./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--video--console--fbcon.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--video--console--fbcon.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 037e795cce503850d2c4452c45fcb076e5748c33e58ba9a275ca2db56216e774 --- 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-8393723 [2022-11-19 08:27:43,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:27:43,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:27:43,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:27:43,208 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:27:43,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:27:43,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:27:43,213 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:27:43,215 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:27:43,216 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:27:43,222 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:27:43,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:27:43,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:27:43,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:27:43,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:27:43,239 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:27:43,240 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:27:43,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:27:43,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:27:43,250 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:27:43,253 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:27:43,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:27:43,262 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:27:43,263 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:27:43,271 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:27:43,271 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:27:43,271 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:27:43,272 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:27:43,273 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:27:43,274 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:27:43,275 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:27:43,276 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:27:43,276 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:27:43,277 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:27:43,278 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:27:43,279 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:27:43,280 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:27:43,280 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:27:43,280 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:27:43,281 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:27:43,282 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:27:43,283 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 08:27:43,317 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:27:43,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:27:43,318 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:27:43,318 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:27:43,319 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:27:43,320 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:27:43,320 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:27:43,320 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:27:43,320 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:27:43,320 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:27:43,322 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:27:43,322 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:27:43,322 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:27:43,322 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:27:43,322 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:27:43,323 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:27:43,323 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:27:43,323 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:27:43,324 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:27:43,324 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:27:43,324 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:27:43,324 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:27:43,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:27:43,326 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:27:43,327 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:27:43,327 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:27:43,327 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:27:43,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:27:43,327 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:27:43,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:27:43,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:27:43,328 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:27:43,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:27:43,329 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:27:43,329 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:27:43,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:27:43,329 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:27:43,329 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:27:43,330 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_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 037e795cce503850d2c4452c45fcb076e5748c33e58ba9a275ca2db56216e774 [2022-11-19 08:27:43,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:27:43,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:27:43,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:27:43,754 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:27:43,755 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:27:43,756 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--video--console--fbcon.ko-entry_point.cil.out.i [2022-11-19 08:27:43,830 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/data/7eb89cce2/295757715a0d4236aa213d86854c2167/FLAGe9b333df3 [2022-11-19 08:27:44,896 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:27:44,897 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--video--console--fbcon.ko-entry_point.cil.out.i [2022-11-19 08:27:44,967 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/data/7eb89cce2/295757715a0d4236aa213d86854c2167/FLAGe9b333df3 [2022-11-19 08:27:45,261 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/data/7eb89cce2/295757715a0d4236aa213d86854c2167 [2022-11-19 08:27:45,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:27:45,269 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:27:45,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:27:45,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:27:45,279 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:27:45,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:27:45" (1/1) ... [2022-11-19 08:27:45,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2890a1df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:45, skipping insertion in model container [2022-11-19 08:27:45,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:27:45" (1/1) ... [2022-11-19 08:27:45,291 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:27:45,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:27:47,807 WARN L234 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_d750fcfd-8f6a-4611-aba9-baad9a988675/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--video--console--fbcon.ko-entry_point.cil.out.i[261739,261752] [2022-11-19 08:27:48,077 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:27:48,162 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:27:48,667 WARN L234 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_d750fcfd-8f6a-4611-aba9-baad9a988675/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--video--console--fbcon.ko-entry_point.cil.out.i[261739,261752] [2022-11-19 08:27:48,685 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:27:48,845 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:27:48,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:48 WrapperNode [2022-11-19 08:27:48,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:27:48,848 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:27:48,848 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:27:48,848 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:27:48,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:48" (1/1) ... [2022-11-19 08:27:49,023 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:48" (1/1) ... [2022-11-19 08:27:49,319 INFO L138 Inliner]: procedures = 308, calls = 2780, calls flagged for inlining = 113, calls inlined = 103, statements flattened = 6304 [2022-11-19 08:27:49,320 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:27:49,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:27:49,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:27:49,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:27:49,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:48" (1/1) ... [2022-11-19 08:27:49,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:48" (1/1) ... [2022-11-19 08:27:49,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:48" (1/1) ... [2022-11-19 08:27:49,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:48" (1/1) ... [2022-11-19 08:27:49,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:48" (1/1) ... [2022-11-19 08:27:49,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:48" (1/1) ... [2022-11-19 08:27:49,835 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:48" (1/1) ... [2022-11-19 08:27:49,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:48" (1/1) ... [2022-11-19 08:27:49,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:27:49,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:27:49,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:27:49,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:27:49,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:48" (1/1) ... [2022-11-19 08:27:49,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:27:49,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:27:49,943 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:27:49,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:27:50,002 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_set_origin [2022-11-19 08:27:50,002 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_set_origin [2022-11-19 08:27:50,003 INFO L130 BoogieDeclarations]: Found specification of procedure con_copy_unimap [2022-11-19 08:27:50,003 INFO L138 BoogieDeclarations]: Found implementation of procedure con_copy_unimap [2022-11-19 08:27:50,003 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_exit [2022-11-19 08:27:50,003 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_exit [2022-11-19 08:27:50,003 INFO L130 BoogieDeclarations]: Found specification of procedure con_is_bound [2022-11-19 08:27:50,004 INFO L138 BoogieDeclarations]: Found implementation of procedure con_is_bound [2022-11-19 08:27:50,004 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_bmove [2022-11-19 08:27:50,004 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_bmove [2022-11-19 08:27:50,004 INFO L130 BoogieDeclarations]: Found specification of procedure var_to_display [2022-11-19 08:27:50,004 INFO L138 BoogieDeclarations]: Found implementation of procedure var_to_display [2022-11-19 08:27:50,004 INFO L130 BoogieDeclarations]: Found specification of procedure do_fbcon_takeover [2022-11-19 08:27:50,005 INFO L138 BoogieDeclarations]: Found implementation of procedure do_fbcon_takeover [2022-11-19 08:27:50,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-19 08:27:50,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-19 08:27:50,005 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-19 08:27:50,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-19 08:27:50,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-19 08:27:50,006 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-19 08:27:50,006 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-19 08:27:50,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-19 08:27:50,006 INFO L130 BoogieDeclarations]: Found specification of procedure con2fb_release_oldinfo [2022-11-19 08:27:50,007 INFO L138 BoogieDeclarations]: Found implementation of procedure con2fb_release_oldinfo [2022-11-19 08:27:50,007 INFO L130 BoogieDeclarations]: Found specification of procedure scr_memcpyw [2022-11-19 08:27:50,007 INFO L138 BoogieDeclarations]: Found implementation of procedure scr_memcpyw [2022-11-19 08:27:50,060 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_cursor [2022-11-19 08:27:50,060 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_cursor [2022-11-19 08:27:50,060 INFO L130 BoogieDeclarations]: Found specification of procedure get_default_font [2022-11-19 08:27:50,060 INFO L138 BoogieDeclarations]: Found implementation of procedure get_default_font [2022-11-19 08:27:50,060 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2022-11-19 08:27:50,061 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2022-11-19 08:27:50,061 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_putcs [2022-11-19 08:27:50,061 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_putcs [2022-11-19 08:27:50,061 INFO L130 BoogieDeclarations]: Found specification of procedure get_color [2022-11-19 08:27:50,061 INFO L138 BoogieDeclarations]: Found implementation of procedure get_color [2022-11-19 08:27:50,061 INFO L130 BoogieDeclarations]: Found specification of procedure scr_memsetw [2022-11-19 08:27:50,061 INFO L138 BoogieDeclarations]: Found implementation of procedure scr_memsetw [2022-11-19 08:27:50,061 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-19 08:27:50,061 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-19 08:27:50,061 INFO L130 BoogieDeclarations]: Found specification of procedure do_unregister_con_driver [2022-11-19 08:27:50,062 INFO L138 BoogieDeclarations]: Found implementation of procedure do_unregister_con_driver [2022-11-19 08:27:50,062 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-19 08:27:50,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-19 08:27:50,062 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_get_font [2022-11-19 08:27:50,062 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_get_font [2022-11-19 08:27:50,062 INFO L130 BoogieDeclarations]: Found specification of procedure real_y [2022-11-19 08:27:50,062 INFO L138 BoogieDeclarations]: Found implementation of procedure real_y [2022-11-19 08:27:50,062 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_update_softback [2022-11-19 08:27:50,062 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_update_softback [2022-11-19 08:27:50,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-19 08:27:50,063 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-19 08:27:50,063 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 08:27:50,063 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 08:27:50,063 INFO L130 BoogieDeclarations]: Found specification of procedure update_region [2022-11-19 08:27:50,063 INFO L138 BoogieDeclarations]: Found implementation of procedure update_region [2022-11-19 08:27:50,063 INFO L130 BoogieDeclarations]: Found specification of procedure fb_flashcursor [2022-11-19 08:27:50,063 INFO L138 BoogieDeclarations]: Found implementation of procedure fb_flashcursor [2022-11-19 08:27:50,063 INFO L130 BoogieDeclarations]: Found specification of procedure find_font [2022-11-19 08:27:50,063 INFO L138 BoogieDeclarations]: Found implementation of procedure find_font [2022-11-19 08:27:50,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:27:50,064 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_scrolldelta [2022-11-19 08:27:50,064 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_scrolldelta [2022-11-19 08:27:50,064 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-19 08:27:50,064 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_set_disp [2022-11-19 08:27:50,064 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_set_disp [2022-11-19 08:27:50,064 INFO L130 BoogieDeclarations]: Found specification of procedure module_put [2022-11-19 08:27:50,064 INFO L138 BoogieDeclarations]: Found implementation of procedure module_put [2022-11-19 08:27:50,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 08:27:50,064 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_clear_margins [2022-11-19 08:27:50,064 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_clear_margins [2022-11-19 08:27:50,065 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-19 08:27:50,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-19 08:27:50,065 INFO L130 BoogieDeclarations]: Found specification of procedure display_to_var [2022-11-19 08:27:50,065 INFO L138 BoogieDeclarations]: Found implementation of procedure display_to_var [2022-11-19 08:27:50,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:27:50,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 08:27:50,065 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~int~X~int~X~int~TO~VOID [2022-11-19 08:27:50,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~int~X~int~X~int~TO~VOID [2022-11-19 08:27:50,065 INFO L130 BoogieDeclarations]: Found specification of procedure try_module_get [2022-11-19 08:27:50,065 INFO L138 BoogieDeclarations]: Found implementation of procedure try_module_get [2022-11-19 08:27:50,066 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-19 08:27:50,066 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-19 08:27:50,066 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2022-11-19 08:27:50,066 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2022-11-19 08:27:50,066 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-19 08:27:50,066 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-19 08:27:50,066 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_debug_enter [2022-11-19 08:27:50,066 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_debug_enter [2022-11-19 08:27:50,066 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_del_cursor_timer [2022-11-19 08:27:50,066 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_del_cursor_timer [2022-11-19 08:27:50,067 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_redraw_move [2022-11-19 08:27:50,067 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_redraw_move [2022-11-19 08:27:50,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-19 08:27:50,067 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2022-11-19 08:27:50,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2022-11-19 08:27:50,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-19 08:27:50,067 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_is_inactive [2022-11-19 08:27:50,067 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_is_inactive [2022-11-19 08:27:50,067 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_clear [2022-11-19 08:27:50,067 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_clear [2022-11-19 08:27:50,068 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_add_cursor_timer [2022-11-19 08:27:50,068 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_add_cursor_timer [2022-11-19 08:27:50,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 08:27:50,068 INFO L130 BoogieDeclarations]: Found specification of procedure fb_set_var [2022-11-19 08:27:50,068 INFO L138 BoogieDeclarations]: Found implementation of procedure fb_set_var [2022-11-19 08:27:50,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-19 08:27:50,068 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-19 08:27:50,068 INFO L130 BoogieDeclarations]: Found specification of procedure set_blitting_type [2022-11-19 08:27:50,068 INFO L138 BoogieDeclarations]: Found implementation of procedure set_blitting_type [2022-11-19 08:27:50,068 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_bmove_rec [2022-11-19 08:27:50,069 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_bmove_rec [2022-11-19 08:27:50,069 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-19 08:27:50,069 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-19 08:27:50,069 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_set_palette [2022-11-19 08:27:50,069 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_set_palette [2022-11-19 08:27:50,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 08:27:50,069 INFO L130 BoogieDeclarations]: Found specification of procedure set_con2fb_map [2022-11-19 08:27:50,069 INFO L138 BoogieDeclarations]: Found implementation of procedure set_con2fb_map [2022-11-19 08:27:50,070 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_debug_leave [2022-11-19 08:27:50,070 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_debug_leave [2022-11-19 08:27:50,070 INFO L130 BoogieDeclarations]: Found specification of procedure console_conditional_schedule [2022-11-19 08:27:50,070 INFO L138 BoogieDeclarations]: Found implementation of procedure console_conditional_schedule [2022-11-19 08:27:50,070 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_copy_font [2022-11-19 08:27:50,070 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_copy_font [2022-11-19 08:27:50,070 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_do_set_font [2022-11-19 08:27:50,070 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_do_set_font [2022-11-19 08:27:50,070 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-19 08:27:50,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-19 08:27:50,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 08:27:50,071 INFO L130 BoogieDeclarations]: Found specification of procedure con2fb_acquire_newinfo [2022-11-19 08:27:50,071 INFO L138 BoogieDeclarations]: Found implementation of procedure con2fb_acquire_newinfo [2022-11-19 08:27:50,071 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-19 08:27:50,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-19 08:27:50,071 INFO L130 BoogieDeclarations]: Found specification of procedure fb_get_color_depth [2022-11-19 08:27:50,071 INFO L138 BoogieDeclarations]: Found implementation of procedure fb_get_color_depth [2022-11-19 08:27:50,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:27:50,072 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_prepare_logo [2022-11-19 08:27:50,072 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_prepare_logo [2022-11-19 08:27:50,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 08:27:50,072 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_redraw_blit [2022-11-19 08:27:50,072 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_redraw_blit [2022-11-19 08:27:50,072 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_2 [2022-11-19 08:27:50,072 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_2 [2022-11-19 08:27:50,072 INFO L130 BoogieDeclarations]: Found specification of procedure fb_videomode_to_var [2022-11-19 08:27:50,072 INFO L138 BoogieDeclarations]: Found implementation of procedure fb_videomode_to_var [2022-11-19 08:27:50,073 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~int~TO~VOID [2022-11-19 08:27:50,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~int~TO~VOID [2022-11-19 08:27:50,073 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2022-11-19 08:27:50,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2022-11-19 08:27:50,073 INFO L130 BoogieDeclarations]: Found specification of procedure console_lock [2022-11-19 08:27:50,073 INFO L138 BoogieDeclarations]: Found implementation of procedure console_lock [2022-11-19 08:27:50,073 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_modechanged [2022-11-19 08:27:50,073 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_modechanged [2022-11-19 08:27:50,073 INFO L130 BoogieDeclarations]: Found specification of procedure console_unlock [2022-11-19 08:27:50,073 INFO L138 BoogieDeclarations]: Found implementation of procedure console_unlock [2022-11-19 08:27:50,074 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_invert_region [2022-11-19 08:27:50,074 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_invert_region [2022-11-19 08:27:50,074 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_lock_of_fb_info [2022-11-19 08:27:50,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_lock_of_fb_info [2022-11-19 08:27:50,074 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_set_all_vcs [2022-11-19 08:27:50,074 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_set_all_vcs [2022-11-19 08:27:50,074 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_redraw [2022-11-19 08:27:50,074 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_redraw [2022-11-19 08:27:50,074 INFO L130 BoogieDeclarations]: Found specification of procedure updatescrollmode [2022-11-19 08:27:50,074 INFO L138 BoogieDeclarations]: Found implementation of procedure updatescrollmode [2022-11-19 08:27:50,075 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_switch [2022-11-19 08:27:50,075 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_switch [2022-11-19 08:27:50,075 INFO L130 BoogieDeclarations]: Found specification of procedure vc_resize [2022-11-19 08:27:50,075 INFO L138 BoogieDeclarations]: Found implementation of procedure vc_resize [2022-11-19 08:27:50,075 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-19 08:27:50,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-19 08:27:50,075 INFO L130 BoogieDeclarations]: Found specification of procedure redraw_screen [2022-11-19 08:27:50,075 INFO L138 BoogieDeclarations]: Found implementation of procedure redraw_screen [2022-11-19 08:27:50,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:27:50,076 INFO L130 BoogieDeclarations]: Found specification of procedure search_fb_in_map [2022-11-19 08:27:50,076 INFO L138 BoogieDeclarations]: Found implementation of procedure search_fb_in_map [2022-11-19 08:27:50,076 INFO L130 BoogieDeclarations]: Found specification of procedure con_set_default_unimap [2022-11-19 08:27:50,076 INFO L138 BoogieDeclarations]: Found implementation of procedure con_set_default_unimap [2022-11-19 08:27:50,076 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2022-11-19 08:27:50,076 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2022-11-19 08:27:50,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:27:50,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:27:50,077 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-11-19 08:27:50,077 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-11-19 08:27:51,156 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:27:51,160 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:27:54,530 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-19 08:28:23,640 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:28:26,984 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:28:26,985 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 08:28:26,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:28:26 BoogieIcfgContainer [2022-11-19 08:28:26,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:28:26,996 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:28:26,996 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:28:27,001 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:28:27,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:27:45" (1/3) ... [2022-11-19 08:28:27,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ae5c05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:28:27, skipping insertion in model container [2022-11-19 08:28:27,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:27:48" (2/3) ... [2022-11-19 08:28:27,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ae5c05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:28:27, skipping insertion in model container [2022-11-19 08:28:27,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:28:26" (3/3) ... [2022-11-19 08:28:27,005 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--video--console--fbcon.ko-entry_point.cil.out.i [2022-11-19 08:28:27,030 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:28:27,030 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:28:27,157 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:28:27,165 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3382109d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:28:27,166 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:28:27,178 INFO L276 IsEmpty]: Start isEmpty. Operand has 1472 states, 986 states have (on average 1.4219066937119675) internal successors, (1402), 1041 states have internal predecessors, (1402), 401 states have call successors, (401), 84 states have call predecessors, (401), 83 states have return successors, (396), 384 states have call predecessors, (396), 396 states have call successors, (396) [2022-11-19 08:28:27,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2022-11-19 08:28:27,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:27,322 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:27,322 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:27,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:27,333 INFO L85 PathProgramCache]: Analyzing trace with hash -2056681997, now seen corresponding path program 1 times [2022-11-19 08:28:27,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:27,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277604980] [2022-11-19 08:28:27,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:27,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:29,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4207 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4207 trivial. 0 not checked. [2022-11-19 08:28:29,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:29,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277604980] [2022-11-19 08:28:29,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277604980] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:29,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:29,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:29,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968362702] [2022-11-19 08:28:29,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:29,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:29,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:29,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:29,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:29,200 INFO L87 Difference]: Start difference. First operand has 1472 states, 986 states have (on average 1.4219066937119675) internal successors, (1402), 1041 states have internal predecessors, (1402), 401 states have call successors, (401), 84 states have call predecessors, (401), 83 states have return successors, (396), 384 states have call predecessors, (396), 396 states have call successors, (396) Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2022-11-19 08:28:31,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:33,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:28:36,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:28:39,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:45,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:47,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:48,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:49,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:49,064 INFO L93 Difference]: Finished difference Result 4121 states and 6156 transitions. [2022-11-19 08:28:49,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:49,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) Word has length 433 [2022-11-19 08:28:49,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:49,110 INFO L225 Difference]: With dead ends: 4121 [2022-11-19 08:28:49,111 INFO L226 Difference]: Without dead ends: 2724 [2022-11-19 08:28:49,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:49,126 INFO L413 NwaCegarLoop]: 2296 mSDtfsCounter, 1910 mSDsluCounter, 1908 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 3 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1914 SdHoareTripleChecker+Valid, 4204 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:49,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1914 Valid, 4204 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 483 Invalid, 5 Unknown, 0 Unchecked, 19.5s Time] [2022-11-19 08:28:49,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2022-11-19 08:28:49,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 2719. [2022-11-19 08:28:49,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2719 states, 1853 states have (on average 1.42471667566109) internal successors, (2640), 1939 states have internal predecessors, (2640), 706 states have call successors, (706), 162 states have call predecessors, (706), 159 states have return successors, (700), 675 states have call predecessors, (700), 700 states have call successors, (700) [2022-11-19 08:28:49,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2719 states to 2719 states and 4046 transitions. [2022-11-19 08:28:49,372 INFO L78 Accepts]: Start accepts. Automaton has 2719 states and 4046 transitions. Word has length 433 [2022-11-19 08:28:49,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:49,378 INFO L495 AbstractCegarLoop]: Abstraction has 2719 states and 4046 transitions. [2022-11-19 08:28:49,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2022-11-19 08:28:49,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2719 states and 4046 transitions. [2022-11-19 08:28:49,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-19 08:28:49,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:49,402 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:49,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:28:49,403 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:49,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:49,404 INFO L85 PathProgramCache]: Analyzing trace with hash -603701151, now seen corresponding path program 1 times [2022-11-19 08:28:49,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:49,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196137715] [2022-11-19 08:28:49,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:49,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:50,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4207 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4207 trivial. 0 not checked. [2022-11-19 08:28:50,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:50,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196137715] [2022-11-19 08:28:50,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196137715] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:50,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:50,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:50,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431980312] [2022-11-19 08:28:50,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:50,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:50,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:50,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:50,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:50,705 INFO L87 Difference]: Start difference. First operand 2719 states and 4046 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2022-11-19 08:28:52,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:54,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:28:56,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:28:58,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:29:00,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:05,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:08,175 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 [] [2022-11-19 08:29:08,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:29:08,478 INFO L93 Difference]: Finished difference Result 5350 states and 7963 transitions. [2022-11-19 08:29:08,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:29:08,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) Word has length 438 [2022-11-19 08:29:08,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:29:08,500 INFO L225 Difference]: With dead ends: 5350 [2022-11-19 08:29:08,500 INFO L226 Difference]: Without dead ends: 2720 [2022-11-19 08:29:08,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:29:08,515 INFO L413 NwaCegarLoop]: 1940 mSDtfsCounter, 0 mSDsluCounter, 1937 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3877 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:29:08,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3877 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 471 Invalid, 5 Unknown, 0 Unchecked, 17.6s Time] [2022-11-19 08:29:08,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2720 states. [2022-11-19 08:29:08,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2720 to 2720. [2022-11-19 08:29:08,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2720 states, 1854 states have (on average 1.424487594390507) internal successors, (2641), 1940 states have internal predecessors, (2641), 706 states have call successors, (706), 162 states have call predecessors, (706), 159 states have return successors, (700), 675 states have call predecessors, (700), 700 states have call successors, (700) [2022-11-19 08:29:08,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2720 states to 2720 states and 4047 transitions. [2022-11-19 08:29:08,650 INFO L78 Accepts]: Start accepts. Automaton has 2720 states and 4047 transitions. Word has length 438 [2022-11-19 08:29:08,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:29:08,653 INFO L495 AbstractCegarLoop]: Abstraction has 2720 states and 4047 transitions. [2022-11-19 08:29:08,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2022-11-19 08:29:08,654 INFO L276 IsEmpty]: Start isEmpty. Operand 2720 states and 4047 transitions. [2022-11-19 08:29:08,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2022-11-19 08:29:08,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:29:08,669 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:29:08,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:29:08,670 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:29:08,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:29:08,681 INFO L85 PathProgramCache]: Analyzing trace with hash -300025543, now seen corresponding path program 1 times [2022-11-19 08:29:08,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:29:08,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197419580] [2022-11-19 08:29:08,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:29:08,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:29:08,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:29:09,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4207 trivial. 0 not checked. [2022-11-19 08:29:09,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:29:09,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197419580] [2022-11-19 08:29:09,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197419580] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:29:09,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92890428] [2022-11-19 08:29:09,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:29:09,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:29:09,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:29:09,929 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:29:09,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:29:12,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:29:12,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 4812 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:29:12,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:29:13,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4208 trivial. 0 not checked. [2022-11-19 08:29:13,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:29:13,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92890428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:29:13,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:29:13,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-19 08:29:13,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464282081] [2022-11-19 08:29:13,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:29:13,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:29:13,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:29:13,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:29:13,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:29:13,857 INFO L87 Difference]: Start difference. First operand 2720 states and 4047 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2022-11-19 08:29:15,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:17,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:29:19,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:29:21,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:29:23,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:27,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:29:30,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:31,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:32,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:33,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:29:33,238 INFO L93 Difference]: Finished difference Result 5291 states and 7870 transitions. [2022-11-19 08:29:33,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:29:33,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) Word has length 439 [2022-11-19 08:29:33,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:29:33,278 INFO L225 Difference]: With dead ends: 5291 [2022-11-19 08:29:33,279 INFO L226 Difference]: Without dead ends: 5288 [2022-11-19 08:29:33,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:29:33,285 INFO L413 NwaCegarLoop]: 2345 mSDtfsCounter, 1909 mSDsluCounter, 1800 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 1 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1914 SdHoareTripleChecker+Valid, 4145 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:29:33,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1914 Valid, 4145 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 479 Invalid, 6 Unknown, 0 Unchecked, 19.2s Time] [2022-11-19 08:29:33,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5288 states. [2022-11-19 08:29:33,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5288 to 5281. [2022-11-19 08:29:33,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5281 states, 3625 states have (on average 1.4297931034482758) internal successors, (5183), 3789 states have internal predecessors, (5183), 1342 states have call successors, (1342), 320 states have call predecessors, (1342), 313 states have return successors, (1336), 1285 states have call predecessors, (1336), 1336 states have call successors, (1336) [2022-11-19 08:29:33,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5281 states to 5281 states and 7861 transitions. [2022-11-19 08:29:33,531 INFO L78 Accepts]: Start accepts. Automaton has 5281 states and 7861 transitions. Word has length 439 [2022-11-19 08:29:33,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:29:33,532 INFO L495 AbstractCegarLoop]: Abstraction has 5281 states and 7861 transitions. [2022-11-19 08:29:33,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2022-11-19 08:29:33,533 INFO L276 IsEmpty]: Start isEmpty. Operand 5281 states and 7861 transitions. [2022-11-19 08:29:33,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2022-11-19 08:29:33,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:29:33,557 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:29:33,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 08:29:33,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:29:33,774 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:29:33,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:29:33,774 INFO L85 PathProgramCache]: Analyzing trace with hash -711393613, now seen corresponding path program 1 times [2022-11-19 08:29:33,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:29:33,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41871486] [2022-11-19 08:29:33,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:29:33,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:29:34,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:29:35,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4207 trivial. 0 not checked. [2022-11-19 08:29:35,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:29:35,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41871486] [2022-11-19 08:29:35,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41871486] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:29:35,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356513188] [2022-11-19 08:29:35,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:29:35,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:29:35,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:29:35,078 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:29:35,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:29:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:29:37,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 4814 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:29:37,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:29:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4208 trivial. 0 not checked. [2022-11-19 08:29:38,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:29:38,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356513188] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:29:38,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:29:38,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-19 08:29:38,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111030308] [2022-11-19 08:29:38,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:29:38,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:29:38,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:29:38,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:29:38,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:29:38,649 INFO L87 Difference]: Start difference. First operand 5281 states and 7861 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2022-11-19 08:29:40,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:42,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:29:44,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:29:47,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:51,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:53,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:55,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:29:55,091 INFO L93 Difference]: Finished difference Result 5292 states and 7871 transitions. [2022-11-19 08:29:55,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:29:55,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) Word has length 440 [2022-11-19 08:29:55,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:29:55,134 INFO L225 Difference]: With dead ends: 5292 [2022-11-19 08:29:55,135 INFO L226 Difference]: Without dead ends: 5289 [2022-11-19 08:29:55,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:29:55,145 INFO L413 NwaCegarLoop]: 2339 mSDtfsCounter, 1906 mSDsluCounter, 1803 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 1 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1911 SdHoareTripleChecker+Valid, 4142 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:29:55,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1911 Valid, 4142 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 478 Invalid, 5 Unknown, 0 Unchecked, 16.3s Time] [2022-11-19 08:29:55,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5289 states. [2022-11-19 08:29:55,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5289 to 5282. [2022-11-19 08:29:55,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5282 states, 3626 states have (on average 1.4296745725317155) internal successors, (5184), 3790 states have internal predecessors, (5184), 1342 states have call successors, (1342), 320 states have call predecessors, (1342), 313 states have return successors, (1336), 1285 states have call predecessors, (1336), 1336 states have call successors, (1336) [2022-11-19 08:29:55,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5282 states to 5282 states and 7862 transitions. [2022-11-19 08:29:55,429 INFO L78 Accepts]: Start accepts. Automaton has 5282 states and 7862 transitions. Word has length 440 [2022-11-19 08:29:55,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:29:55,431 INFO L495 AbstractCegarLoop]: Abstraction has 5282 states and 7862 transitions. [2022-11-19 08:29:55,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2022-11-19 08:29:55,432 INFO L276 IsEmpty]: Start isEmpty. Operand 5282 states and 7862 transitions. [2022-11-19 08:29:55,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2022-11-19 08:29:55,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:29:55,451 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:29:55,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:29:55,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:29:55,674 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:29:55,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:29:55,674 INFO L85 PathProgramCache]: Analyzing trace with hash -578897028, now seen corresponding path program 1 times [2022-11-19 08:29:55,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:29:55,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838078790] [2022-11-19 08:29:55,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:29:55,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:29:56,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:29:56,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4207 trivial. 0 not checked. [2022-11-19 08:29:56,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:29:56,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838078790] [2022-11-19 08:29:56,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838078790] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:29:56,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005583514] [2022-11-19 08:29:56,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:29:56,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:29:56,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:29:56,821 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:29:56,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:29:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:29:59,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 4816 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:29:59,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:30:00,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4208 trivial. 0 not checked. [2022-11-19 08:30:00,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:30:00,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005583514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:30:00,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:30:00,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-19 08:30:00,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484531717] [2022-11-19 08:30:00,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:30:00,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:30:00,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:30:00,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:30:00,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:30:00,554 INFO L87 Difference]: Start difference. First operand 5282 states and 7862 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2022-11-19 08:30:02,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:30:04,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:30:06,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:30:09,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:30:13,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:30:15,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:30:17,293 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 [] [2022-11-19 08:30:17,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:17,758 INFO L93 Difference]: Finished difference Result 13023 states and 19400 transitions. [2022-11-19 08:30:17,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:30:17,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) Word has length 441 [2022-11-19 08:30:17,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:17,816 INFO L225 Difference]: With dead ends: 13023 [2022-11-19 08:30:17,816 INFO L226 Difference]: Without dead ends: 7830 [2022-11-19 08:30:17,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:30:17,848 INFO L413 NwaCegarLoop]: 2342 mSDtfsCounter, 1905 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 3 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1910 SdHoareTripleChecker+Valid, 4143 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:17,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1910 Valid, 4143 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 477 Invalid, 6 Unknown, 0 Unchecked, 16.9s Time] [2022-11-19 08:30:17,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7830 states. [2022-11-19 08:30:18,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7830 to 7812. [2022-11-19 08:30:18,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7812 states, 5381 states have (on average 1.4324475004645976) internal successors, (7708), 5623 states have internal predecessors, (7708), 1971 states have call successors, (1971), 471 states have call predecessors, (1971), 459 states have return successors, (1964), 1887 states have call predecessors, (1964), 1964 states have call successors, (1964) [2022-11-19 08:30:18,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7812 states to 7812 states and 11643 transitions. [2022-11-19 08:30:18,362 INFO L78 Accepts]: Start accepts. Automaton has 7812 states and 11643 transitions. Word has length 441 [2022-11-19 08:30:18,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:18,363 INFO L495 AbstractCegarLoop]: Abstraction has 7812 states and 11643 transitions. [2022-11-19 08:30:18,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2022-11-19 08:30:18,364 INFO L276 IsEmpty]: Start isEmpty. Operand 7812 states and 11643 transitions. [2022-11-19 08:30:18,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2022-11-19 08:30:18,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:18,375 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:30:18,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:30:18,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:30:18,595 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:30:18,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:18,596 INFO L85 PathProgramCache]: Analyzing trace with hash -766465322, now seen corresponding path program 1 times [2022-11-19 08:30:18,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:30:18,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930576159] [2022-11-19 08:30:18,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:18,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:30:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:19,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4207 trivial. 0 not checked. [2022-11-19 08:30:19,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:30:19,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930576159] [2022-11-19 08:30:19,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930576159] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:30:19,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217496504] [2022-11-19 08:30:19,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:19,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:30:19,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:30:19,577 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:30:19,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:30:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:21,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 4818 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:30:21,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:30:23,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4208 trivial. 0 not checked. [2022-11-19 08:30:23,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:30:23,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217496504] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:30:23,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:30:23,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-19 08:30:23,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801823460] [2022-11-19 08:30:23,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:30:23,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:30:23,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:30:23,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:30:23,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:30:23,086 INFO L87 Difference]: Start difference. First operand 7812 states and 11643 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2022-11-19 08:30:24,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:30:26,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:30:28,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:30:31,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:30:35,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:30:38,040 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 [] [2022-11-19 08:30:38,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:38,393 INFO L93 Difference]: Finished difference Result 7859 states and 11677 transitions. [2022-11-19 08:30:38,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:30:38,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) Word has length 442 [2022-11-19 08:30:38,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:38,444 INFO L225 Difference]: With dead ends: 7859 [2022-11-19 08:30:38,444 INFO L226 Difference]: Without dead ends: 7856 [2022-11-19 08:30:38,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:30:38,451 INFO L413 NwaCegarLoop]: 2333 mSDtfsCounter, 1863 mSDsluCounter, 1809 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 1 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1870 SdHoareTripleChecker+Valid, 4142 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:38,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1870 Valid, 4142 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 477 Invalid, 5 Unknown, 0 Unchecked, 15.0s Time] [2022-11-19 08:30:38,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7856 states. [2022-11-19 08:30:38,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7856 to 7842. [2022-11-19 08:30:38,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7842 states, 5397 states have (on average 1.431165462293867) internal successors, (7724), 5639 states have internal predecessors, (7724), 1971 states have call successors, (1971), 485 states have call predecessors, (1971), 473 states have return successors, (1964), 1887 states have call predecessors, (1964), 1964 states have call successors, (1964) [2022-11-19 08:30:38,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7842 states to 7842 states and 11659 transitions. [2022-11-19 08:30:38,851 INFO L78 Accepts]: Start accepts. Automaton has 7842 states and 11659 transitions. Word has length 442 [2022-11-19 08:30:38,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:38,852 INFO L495 AbstractCegarLoop]: Abstraction has 7842 states and 11659 transitions. [2022-11-19 08:30:38,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2022-11-19 08:30:38,853 INFO L276 IsEmpty]: Start isEmpty. Operand 7842 states and 11659 transitions. [2022-11-19 08:30:38,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2022-11-19 08:30:38,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:38,865 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:30:38,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:30:39,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:30:39,086 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:30:39,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:39,086 INFO L85 PathProgramCache]: Analyzing trace with hash 2008857023, now seen corresponding path program 1 times [2022-11-19 08:30:39,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:30:39,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999273313] [2022-11-19 08:30:39,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:39,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:30:39,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:39,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4207 trivial. 0 not checked. [2022-11-19 08:30:39,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:30:39,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999273313] [2022-11-19 08:30:39,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999273313] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:30:39,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835041586] [2022-11-19 08:30:39,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:39,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:30:39,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:30:39,944 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:30:39,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:30:42,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:42,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 4820 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:30:42,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:30:43,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4208 trivial. 0 not checked. [2022-11-19 08:30:43,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:30:43,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835041586] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:30:43,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:30:43,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-19 08:30:43,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400202236] [2022-11-19 08:30:43,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:30:43,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:30:43,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:30:43,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:30:43,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:30:43,652 INFO L87 Difference]: Start difference. First operand 7842 states and 11659 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2022-11-19 08:30:46,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:30:48,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:30:51,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:30:56,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:30:58,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:30:59,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:31:00,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:31:00,091 INFO L93 Difference]: Finished difference Result 7856 states and 11671 transitions. [2022-11-19 08:31:00,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:31:00,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) Word has length 443 [2022-11-19 08:31:00,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:31:00,133 INFO L225 Difference]: With dead ends: 7856 [2022-11-19 08:31:00,134 INFO L226 Difference]: Without dead ends: 7831 [2022-11-19 08:31:00,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:31:00,143 INFO L413 NwaCegarLoop]: 2340 mSDtfsCounter, 1891 mSDsluCounter, 1812 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1896 SdHoareTripleChecker+Valid, 4152 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:31:00,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1896 Valid, 4152 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 478 Invalid, 4 Unknown, 0 Unchecked, 16.2s Time] [2022-11-19 08:31:00,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7831 states. [2022-11-19 08:31:00,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7831 to 7821. [2022-11-19 08:31:00,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7821 states, 5383 states have (on average 1.4313579788222182) internal successors, (7705), 5625 states have internal predecessors, (7705), 1966 states have call successors, (1966), 483 states have call predecessors, (1966), 471 states have return successors, (1959), 1882 states have call predecessors, (1959), 1959 states have call successors, (1959) [2022-11-19 08:31:00,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7821 states to 7821 states and 11630 transitions. [2022-11-19 08:31:00,536 INFO L78 Accepts]: Start accepts. Automaton has 7821 states and 11630 transitions. Word has length 443 [2022-11-19 08:31:00,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:31:00,537 INFO L495 AbstractCegarLoop]: Abstraction has 7821 states and 11630 transitions. [2022-11-19 08:31:00,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2022-11-19 08:31:00,537 INFO L276 IsEmpty]: Start isEmpty. Operand 7821 states and 11630 transitions. [2022-11-19 08:31:00,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2022-11-19 08:31:00,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:31:00,548 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2022-11-19 08:31:00,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:31:00,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:31:00,768 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:31:00,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:31:00,768 INFO L85 PathProgramCache]: Analyzing trace with hash 294511034, now seen corresponding path program 1 times [2022-11-19 08:31:00,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:31:00,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699044486] [2022-11-19 08:31:00,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:00,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:31:01,097 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:31:01,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347838690] [2022-11-19 08:31:01,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:01,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:31:01,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:31:01,099 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:31:01,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:31:03,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:31:03,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 5597 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:31:03,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:31:03,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4209 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4209 trivial. 0 not checked. [2022-11-19 08:31:03,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:31:03,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:31:03,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699044486] [2022-11-19 08:31:03,823 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:31:03,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347838690] [2022-11-19 08:31:03,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347838690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:31:03,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:31:03,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:31:03,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686096875] [2022-11-19 08:31:03,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:31:03,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:31:03,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:31:03,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:31:03,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:31:03,826 INFO L87 Difference]: Start difference. First operand 7821 states and 11630 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (51), 3 states have call predecessors, (51), 3 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) [2022-11-19 08:31:06,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:31:09,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:31:13,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:31:14,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:31:17,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:31:18,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:31:18,510 INFO L93 Difference]: Finished difference Result 12277 states and 18131 transitions. [2022-11-19 08:31:18,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:31:18,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (51), 3 states have call predecessors, (51), 3 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) Word has length 446 [2022-11-19 08:31:18,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:31:18,581 INFO L225 Difference]: With dead ends: 12277 [2022-11-19 08:31:18,581 INFO L226 Difference]: Without dead ends: 11564 [2022-11-19 08:31:18,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:31:18,597 INFO L413 NwaCegarLoop]: 2254 mSDtfsCounter, 2022 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 3 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2029 SdHoareTripleChecker+Valid, 4023 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:31:18,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2029 Valid, 4023 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 472 Invalid, 4 Unknown, 0 Unchecked, 14.3s Time] [2022-11-19 08:31:18,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11564 states. [2022-11-19 08:31:19,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11564 to 11550. [2022-11-19 08:31:19,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11550 states, 7964 states have (on average 1.4330738322451029) internal successors, (11413), 8317 states have internal predecessors, (11413), 2879 states have call successors, (2879), 724 states have call predecessors, (2879), 706 states have return successors, (2878), 2756 states have call predecessors, (2878), 2872 states have call successors, (2878) [2022-11-19 08:31:19,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11550 states to 11550 states and 17170 transitions. [2022-11-19 08:31:19,356 INFO L78 Accepts]: Start accepts. Automaton has 11550 states and 17170 transitions. Word has length 446 [2022-11-19 08:31:19,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:31:19,357 INFO L495 AbstractCegarLoop]: Abstraction has 11550 states and 17170 transitions. [2022-11-19 08:31:19,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (51), 3 states have call predecessors, (51), 3 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) [2022-11-19 08:31:19,357 INFO L276 IsEmpty]: Start isEmpty. Operand 11550 states and 17170 transitions. [2022-11-19 08:31:19,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2022-11-19 08:31:19,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:31:19,371 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2022-11-19 08:31:19,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:31:19,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-19 08:31:19,590 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:31:19,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:31:19,592 INFO L85 PathProgramCache]: Analyzing trace with hash -984996928, now seen corresponding path program 1 times [2022-11-19 08:31:19,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:31:19,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754017179] [2022-11-19 08:31:19,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:19,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:31:19,896 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:31:19,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [388141646] [2022-11-19 08:31:19,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:19,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:31:19,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:31:19,898 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:31:19,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:31:22,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:31:22,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 5576 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:31:22,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:31:22,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4210 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4208 trivial. 0 not checked. [2022-11-19 08:31:22,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:31:22,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:31:22,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754017179] [2022-11-19 08:31:22,619 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:31:22,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388141646] [2022-11-19 08:31:22,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388141646] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:31:22,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:31:22,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:31:22,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322306477] [2022-11-19 08:31:22,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:31:22,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:31:22,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:31:22,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:31:22,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:31:22,622 INFO L87 Difference]: Start difference. First operand 11550 states and 17170 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2022-11-19 08:31:24,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:31:27,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:31:29,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:31:31,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:31:34,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:31:37,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:31:39,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:31:39,548 INFO L93 Difference]: Finished difference Result 29041 states and 43043 transitions. [2022-11-19 08:31:39,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:31:39,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) Word has length 452 [2022-11-19 08:31:39,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:31:39,649 INFO L225 Difference]: With dead ends: 29041 [2022-11-19 08:31:39,650 INFO L226 Difference]: Without dead ends: 17588 [2022-11-19 08:31:39,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:31:39,715 INFO L413 NwaCegarLoop]: 2141 mSDtfsCounter, 1037 mSDsluCounter, 1875 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 24 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1043 SdHoareTripleChecker+Valid, 4016 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:31:39,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1043 Valid, 4016 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 562 Invalid, 6 Unknown, 0 Unchecked, 16.2s Time] [2022-11-19 08:31:39,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17588 states. [2022-11-19 08:31:40,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17588 to 17532. [2022-11-19 08:31:40,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17532 states, 12222 states have (on average 1.434135166093929) internal successors, (17528), 12736 states have internal predecessors, (17528), 4104 states have call successors, (4104), 1241 states have call predecessors, (4104), 1205 states have return successors, (4121), 3925 states have call predecessors, (4121), 4097 states have call successors, (4121) [2022-11-19 08:31:40,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17532 states to 17532 states and 25753 transitions. [2022-11-19 08:31:40,577 INFO L78 Accepts]: Start accepts. Automaton has 17532 states and 25753 transitions. Word has length 452 [2022-11-19 08:31:40,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:31:40,578 INFO L495 AbstractCegarLoop]: Abstraction has 17532 states and 25753 transitions. [2022-11-19 08:31:40,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2022-11-19 08:31:40,579 INFO L276 IsEmpty]: Start isEmpty. Operand 17532 states and 25753 transitions. [2022-11-19 08:31:40,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2022-11-19 08:31:40,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:31:40,604 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:31:40,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 08:31:40,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:31:40,818 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:31:40,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:31:40,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1195338870, now seen corresponding path program 1 times [2022-11-19 08:31:40,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:31:40,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748508102] [2022-11-19 08:31:40,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:40,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:31:41,254 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:31:41,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534990358] [2022-11-19 08:31:41,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:41,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:31:41,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:31:41,261 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:31:41,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 08:31:44,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:31:44,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 5882 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:31:44,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:31:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4392 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4392 trivial. 0 not checked. [2022-11-19 08:31:45,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:31:45,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:31:45,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748508102] [2022-11-19 08:31:45,871 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:31:45,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534990358] [2022-11-19 08:31:45,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534990358] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:31:45,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:31:45,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:31:45,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449370443] [2022-11-19 08:31:45,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:31:45,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:31:45,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:31:45,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:31:45,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:31:45,874 INFO L87 Difference]: Start difference. First operand 17532 states and 25753 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2022-11-19 08:31:47,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:31:50,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:31:52,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:31:54,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:31:57,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:31:59,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:32:00,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:00,903 INFO L93 Difference]: Finished difference Result 17830 states and 26123 transitions. [2022-11-19 08:32:00,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:32:00,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 502 [2022-11-19 08:32:00,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:00,986 INFO L225 Difference]: With dead ends: 17830 [2022-11-19 08:32:00,986 INFO L226 Difference]: Without dead ends: 17827 [2022-11-19 08:32:00,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:32:00,996 INFO L413 NwaCegarLoop]: 2042 mSDtfsCounter, 1871 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1878 SdHoareTripleChecker+Valid, 2409 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:00,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1878 Valid, 2409 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 302 Invalid, 6 Unknown, 0 Unchecked, 14.4s Time] [2022-11-19 08:32:01,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17827 states. [2022-11-19 08:32:01,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17827 to 17825. [2022-11-19 08:32:01,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17825 states, 12410 states have (on average 1.431829170024174) internal successors, (17769), 12933 states have internal predecessors, (17769), 4159 states have call successors, (4159), 1287 states have call predecessors, (4159), 1255 states have return successors, (4189), 3978 states have call predecessors, (4189), 4153 states have call successors, (4189) [2022-11-19 08:32:01,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17825 states to 17825 states and 26117 transitions. [2022-11-19 08:32:01,864 INFO L78 Accepts]: Start accepts. Automaton has 17825 states and 26117 transitions. Word has length 502 [2022-11-19 08:32:01,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:01,865 INFO L495 AbstractCegarLoop]: Abstraction has 17825 states and 26117 transitions. [2022-11-19 08:32:01,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2022-11-19 08:32:01,865 INFO L276 IsEmpty]: Start isEmpty. Operand 17825 states and 26117 transitions. [2022-11-19 08:32:01,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2022-11-19 08:32:01,888 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:01,888 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:01,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:32:02,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:32:02,102 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:32:02,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:02,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1598664322, now seen corresponding path program 1 times [2022-11-19 08:32:02,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:02,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527292889] [2022-11-19 08:32:02,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:02,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:02,397 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:32:02,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728780168] [2022-11-19 08:32:02,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:02,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:32:02,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:32:02,399 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:32:02,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 08:32:05,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:05,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 5884 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:32:05,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4392 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4392 trivial. 0 not checked. [2022-11-19 08:32:07,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:32:07,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:07,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527292889] [2022-11-19 08:32:07,023 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:32:07,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728780168] [2022-11-19 08:32:07,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728780168] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:07,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:07,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:32:07,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691555587] [2022-11-19 08:32:07,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:07,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:32:07,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:07,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:32:07,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:32:07,026 INFO L87 Difference]: Start difference. First operand 17825 states and 26117 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2022-11-19 08:32:09,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:32:11,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:32:13,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:32:16,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:32:18,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:32:20,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:32:22,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:22,139 INFO L93 Difference]: Finished difference Result 17829 states and 26120 transitions. [2022-11-19 08:32:22,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:32:22,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 503 [2022-11-19 08:32:22,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:22,229 INFO L225 Difference]: With dead ends: 17829 [2022-11-19 08:32:22,230 INFO L226 Difference]: Without dead ends: 17826 [2022-11-19 08:32:22,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:32:22,240 INFO L413 NwaCegarLoop]: 2040 mSDtfsCounter, 1868 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1875 SdHoareTripleChecker+Valid, 2407 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:22,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1875 Valid, 2407 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 302 Invalid, 6 Unknown, 0 Unchecked, 14.5s Time] [2022-11-19 08:32:22,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17826 states. [2022-11-19 08:32:23,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17826 to 17824. [2022-11-19 08:32:23,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17824 states, 12410 states have (on average 1.4316680096696213) internal successors, (17767), 12932 states have internal predecessors, (17767), 4158 states have call successors, (4158), 1287 states have call predecessors, (4158), 1255 states have return successors, (4189), 3978 states have call predecessors, (4189), 4153 states have call successors, (4189) [2022-11-19 08:32:23,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17824 states to 17824 states and 26114 transitions. [2022-11-19 08:32:23,155 INFO L78 Accepts]: Start accepts. Automaton has 17824 states and 26114 transitions. Word has length 503 [2022-11-19 08:32:23,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:23,156 INFO L495 AbstractCegarLoop]: Abstraction has 17824 states and 26114 transitions. [2022-11-19 08:32:23,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2022-11-19 08:32:23,157 INFO L276 IsEmpty]: Start isEmpty. Operand 17824 states and 26114 transitions. [2022-11-19 08:32:23,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2022-11-19 08:32:23,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:23,183 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:23,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 08:32:23,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:32:23,394 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:32:23,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:23,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1981545075, now seen corresponding path program 1 times [2022-11-19 08:32:23,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:23,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630707215] [2022-11-19 08:32:23,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:23,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:23,695 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:32:23,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [363789068] [2022-11-19 08:32:23,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:23,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:32:23,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:32:23,697 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:32:23,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 08:32:26,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:26,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 5886 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:32:26,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:28,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4392 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4392 trivial. 0 not checked. [2022-11-19 08:32:28,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:32:28,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:28,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630707215] [2022-11-19 08:32:28,059 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:32:28,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363789068] [2022-11-19 08:32:28,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363789068] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:28,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:28,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:32:28,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647297321] [2022-11-19 08:32:28,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:28,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:32:28,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:28,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:32:28,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:32:28,062 INFO L87 Difference]: Start difference. First operand 17824 states and 26114 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2022-11-19 08:32:29,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:32:32,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:32:34,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:32:37,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:32:39,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:32:42,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:32:43,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:43,542 INFO L93 Difference]: Finished difference Result 23985 states and 35119 transitions. [2022-11-19 08:32:43,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:32:43,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 504 [2022-11-19 08:32:43,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:43,610 INFO L225 Difference]: With dead ends: 23985 [2022-11-19 08:32:43,610 INFO L226 Difference]: Without dead ends: 12001 [2022-11-19 08:32:43,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:32:43,661 INFO L413 NwaCegarLoop]: 2033 mSDtfsCounter, 1858 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 1 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1865 SdHoareTripleChecker+Valid, 2400 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:43,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1865 Valid, 2400 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 301 Invalid, 5 Unknown, 0 Unchecked, 14.8s Time] [2022-11-19 08:32:43,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12001 states. [2022-11-19 08:32:44,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12001 to 11990. [2022-11-19 08:32:44,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11990 states, 8339 states have (on average 1.430147499700204) internal successors, (11926), 8689 states have internal predecessors, (11926), 2806 states have call successors, (2806), 866 states have call predecessors, (2806), 844 states have return successors, (2826), 2685 states have call predecessors, (2826), 2802 states have call successors, (2826) [2022-11-19 08:32:44,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11990 states to 11990 states and 17558 transitions. [2022-11-19 08:32:44,391 INFO L78 Accepts]: Start accepts. Automaton has 11990 states and 17558 transitions. Word has length 504 [2022-11-19 08:32:44,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:44,391 INFO L495 AbstractCegarLoop]: Abstraction has 11990 states and 17558 transitions. [2022-11-19 08:32:44,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2022-11-19 08:32:44,391 INFO L276 IsEmpty]: Start isEmpty. Operand 11990 states and 17558 transitions. [2022-11-19 08:32:44,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2022-11-19 08:32:44,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:44,516 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:44,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 08:32:44,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 08:32:44,730 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:32:44,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:44,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1298881819, now seen corresponding path program 1 times [2022-11-19 08:32:44,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:44,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745418442] [2022-11-19 08:32:44,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:44,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:45,072 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:32:45,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369971518] [2022-11-19 08:32:45,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:45,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:32:45,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:32:45,074 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:32:45,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 08:32:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:48,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 5888 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:32:48,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:50,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4392 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4392 trivial. 0 not checked. [2022-11-19 08:32:50,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:32:50,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:50,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745418442] [2022-11-19 08:32:50,012 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:32:50,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369971518] [2022-11-19 08:32:50,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369971518] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:50,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:50,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:32:50,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589185650] [2022-11-19 08:32:50,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:50,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:32:50,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:50,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:32:50,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:32:50,014 INFO L87 Difference]: Start difference. First operand 11990 states and 17558 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2022-11-19 08:32:53,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:32:56,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:32:58,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:33:01,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:33:03,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:33:05,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:33:05,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:05,705 INFO L93 Difference]: Finished difference Result 11994 states and 17561 transitions. [2022-11-19 08:33:05,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:33:05,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 505 [2022-11-19 08:33:05,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:05,762 INFO L225 Difference]: With dead ends: 11994 [2022-11-19 08:33:05,762 INFO L226 Difference]: Without dead ends: 11991 [2022-11-19 08:33:05,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 503 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:33:05,770 INFO L413 NwaCegarLoop]: 2032 mSDtfsCounter, 1855 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1862 SdHoareTripleChecker+Valid, 2399 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:05,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1862 Valid, 2399 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 301 Invalid, 5 Unknown, 0 Unchecked, 15.1s Time] [2022-11-19 08:33:05,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11991 states. [2022-11-19 08:33:06,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11991 to 11989. [2022-11-19 08:33:06,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11989 states, 8339 states have (on average 1.4300275812447536) internal successors, (11925), 8688 states have internal predecessors, (11925), 2805 states have call successors, (2805), 866 states have call predecessors, (2805), 844 states have return successors, (2826), 2685 states have call predecessors, (2826), 2802 states have call successors, (2826) [2022-11-19 08:33:06,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11989 states to 11989 states and 17556 transitions. [2022-11-19 08:33:06,424 INFO L78 Accepts]: Start accepts. Automaton has 11989 states and 17556 transitions. Word has length 505 [2022-11-19 08:33:06,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:06,425 INFO L495 AbstractCegarLoop]: Abstraction has 11989 states and 17556 transitions. [2022-11-19 08:33:06,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2022-11-19 08:33:06,425 INFO L276 IsEmpty]: Start isEmpty. Operand 11989 states and 17556 transitions. [2022-11-19 08:33:06,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2022-11-19 08:33:06,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:06,445 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:06,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-19 08:33:06,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 08:33:06,646 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:33:06,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:06,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1611152496, now seen corresponding path program 1 times [2022-11-19 08:33:06,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:33:06,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624973338] [2022-11-19 08:33:06,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:06,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:33:07,072 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:33:07,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730404460] [2022-11-19 08:33:07,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:07,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:07,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:33:07,074 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:33:07,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 08:33:10,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:10,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 5890 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:33:10,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:12,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4392 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4392 trivial. 0 not checked. [2022-11-19 08:33:12,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:33:12,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:33:12,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624973338] [2022-11-19 08:33:12,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:33:12,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730404460] [2022-11-19 08:33:12,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730404460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:12,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:33:12,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:33:12,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229682012] [2022-11-19 08:33:12,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:12,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:33:12,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:33:12,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:33:12,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:33:12,228 INFO L87 Difference]: Start difference. First operand 11989 states and 17556 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2022-11-19 08:33:14,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:33:16,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:33:18,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:33:21,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:33:23,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:33:26,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:33:27,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:27,795 INFO L93 Difference]: Finished difference Result 11993 states and 17559 transitions. [2022-11-19 08:33:27,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:33:27,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 506 [2022-11-19 08:33:27,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:27,857 INFO L225 Difference]: With dead ends: 11993 [2022-11-19 08:33:27,857 INFO L226 Difference]: Without dead ends: 11925 [2022-11-19 08:33:27,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:33:27,865 INFO L413 NwaCegarLoop]: 2031 mSDtfsCounter, 1852 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1859 SdHoareTripleChecker+Valid, 2398 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:27,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1859 Valid, 2398 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 298 Invalid, 6 Unknown, 0 Unchecked, 15.0s Time] [2022-11-19 08:33:27,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11925 states. [2022-11-19 08:33:28,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11925 to 11923. [2022-11-19 08:33:28,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11923 states, 8296 states have (on average 1.4302073288331727) internal successors, (11865), 8643 states have internal predecessors, (11865), 2787 states have call successors, (2787), 861 states have call predecessors, (2787), 839 states have return successors, (2809), 2669 states have call predecessors, (2809), 2785 states have call successors, (2809) [2022-11-19 08:33:28,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11923 states to 11923 states and 17461 transitions. [2022-11-19 08:33:28,609 INFO L78 Accepts]: Start accepts. Automaton has 11923 states and 17461 transitions. Word has length 506 [2022-11-19 08:33:28,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:28,610 INFO L495 AbstractCegarLoop]: Abstraction has 11923 states and 17461 transitions. [2022-11-19 08:33:28,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2022-11-19 08:33:28,610 INFO L276 IsEmpty]: Start isEmpty. Operand 11923 states and 17461 transitions. [2022-11-19 08:33:28,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2022-11-19 08:33:28,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:28,638 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:28,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:28,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:28,842 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:33:28,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:28,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1514579965, now seen corresponding path program 1 times [2022-11-19 08:33:28,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:33:28,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494477768] [2022-11-19 08:33:28,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:28,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:33:29,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:29,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4382 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4379 trivial. 0 not checked. [2022-11-19 08:33:29,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:33:29,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494477768] [2022-11-19 08:33:29,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494477768] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:33:29,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231386485] [2022-11-19 08:33:29,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:29,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:29,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:33:29,990 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:33:29,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d750fcfd-8f6a-4611-aba9-baad9a988675/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 08:33:33,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:33,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 5388 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:33:33,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:33,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4382 backedges. 162 proven. 1 refuted. 0 times theorem prover too weak. 4219 trivial. 0 not checked. [2022-11-19 08:33:33,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:33:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4382 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4379 trivial. 0 not checked. [2022-11-19 08:33:33,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231386485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:33:33,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [824009478] [2022-11-19 08:33:33,840 INFO L159 IcfgInterpreter]: Started Sifa with 185 locations of interest [2022-11-19 08:33:33,841 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:33:33,845 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:33:33,852 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:33:33,852 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:33:38,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:38,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:39,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:39,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:39,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:39,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:39,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:40,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:40,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:40,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:40,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:40,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:41,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:41,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:41,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:41,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:41,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:41,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:41,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:42,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:42,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:42,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:42,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:42,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:42,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:42,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:42,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:42,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:42,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:42,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:42,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:42,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:42,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:42,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:42,801 INFO L217 Elim1Store]: Index analysis took 4356 ms