./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 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/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_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 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-5e519f3 [2022-11-03 02:26:49,109 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:26:49,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:26:49,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:26:49,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:26:49,162 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:26:49,164 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:26:49,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:26:49,171 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:26:49,177 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:26:49,178 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:26:49,179 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:26:49,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:26:49,186 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:26:49,187 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:26:49,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:26:49,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:26:49,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:26:49,194 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:26:49,196 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:26:49,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:26:49,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:26:49,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:26:49,206 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:26:49,210 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:26:49,210 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:26:49,210 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:26:49,211 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:26:49,212 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:26:49,212 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:26:49,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:26:49,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:26:49,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:26:49,215 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:26:49,216 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:26:49,216 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:26:49,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:26:49,221 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:26:49,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:26:49,223 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:26:49,224 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:26:49,224 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:26:49,271 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:26:49,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:26:49,272 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:26:49,272 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:26:49,273 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:26:49,274 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:26:49,274 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:26:49,274 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:26:49,274 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:26:49,274 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:26:49,275 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:26:49,276 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:26:49,276 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:26:49,276 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:26:49,276 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:26:49,277 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:26:49,277 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:26:49,277 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:26:49,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:26:49,278 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:26:49,278 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:26:49,278 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:26:49,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:26:49,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:26:49,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:26:49,280 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:26:49,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:26:49,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:26:49,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:26:49,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:26:49,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:26:49,282 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:26:49,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:26:49,282 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:26:49,282 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:26:49,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:26:49,283 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:26:49,283 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:26:49,283 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_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 037e795cce503850d2c4452c45fcb076e5748c33e58ba9a275ca2db56216e774 [2022-11-03 02:26:49,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:26:49,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:26:49,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:26:49,643 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:26:49,644 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:26:49,645 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/../../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 [2022-11-03 02:26:49,736 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/data/5e7fabd53/ed39bf6254684860ae22f776638fe57e/FLAG2292f23e2 [2022-11-03 02:26:50,649 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:26:50,649 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/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 [2022-11-03 02:26:50,696 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/data/5e7fabd53/ed39bf6254684860ae22f776638fe57e/FLAG2292f23e2 [2022-11-03 02:26:51,098 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/data/5e7fabd53/ed39bf6254684860ae22f776638fe57e [2022-11-03 02:26:51,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:26:51,102 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:26:51,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:26:51,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:26:51,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:26:51,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:26:51" (1/1) ... [2022-11-03 02:26:51,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2367388d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:51, skipping insertion in model container [2022-11-03 02:26:51,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:26:51" (1/1) ... [2022-11-03 02:26:51,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:26:51,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:26:53,468 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/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] [2022-11-03 02:26:53,721 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:26:53,788 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:26:54,249 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/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] [2022-11-03 02:26:54,265 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:26:54,403 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:26:54,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:54 WrapperNode [2022-11-03 02:26:54,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:26:54,405 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:26:54,405 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:26:54,405 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:26:54,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:54" (1/1) ... [2022-11-03 02:26:54,558 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:54" (1/1) ... [2022-11-03 02:26:54,817 INFO L138 Inliner]: procedures = 308, calls = 2780, calls flagged for inlining = 113, calls inlined = 103, statements flattened = 6360 [2022-11-03 02:26:54,817 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:26:54,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:26:54,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:26:54,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:26:54,832 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:54" (1/1) ... [2022-11-03 02:26:54,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:54" (1/1) ... [2022-11-03 02:26:54,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:54" (1/1) ... [2022-11-03 02:26:54,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:54" (1/1) ... [2022-11-03 02:26:55,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:54" (1/1) ... [2022-11-03 02:26:55,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:54" (1/1) ... [2022-11-03 02:26:55,401 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:54" (1/1) ... [2022-11-03 02:26:55,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:54" (1/1) ... [2022-11-03 02:26:55,496 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:26:55,498 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:26:55,499 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:26:55,499 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:26:55,500 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:54" (1/1) ... [2022-11-03 02:26:55,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:26:55,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:26:55,535 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:26:55,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:26:55,594 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_set_origin [2022-11-03 02:26:55,595 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_set_origin [2022-11-03 02:26:55,595 INFO L130 BoogieDeclarations]: Found specification of procedure con_copy_unimap [2022-11-03 02:26:55,595 INFO L138 BoogieDeclarations]: Found implementation of procedure con_copy_unimap [2022-11-03 02:26:55,595 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_exit [2022-11-03 02:26:55,595 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_exit [2022-11-03 02:26:55,596 INFO L130 BoogieDeclarations]: Found specification of procedure con_is_bound [2022-11-03 02:26:55,596 INFO L138 BoogieDeclarations]: Found implementation of procedure con_is_bound [2022-11-03 02:26:55,596 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_bmove [2022-11-03 02:26:55,596 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_bmove [2022-11-03 02:26:55,596 INFO L130 BoogieDeclarations]: Found specification of procedure var_to_display [2022-11-03 02:26:55,597 INFO L138 BoogieDeclarations]: Found implementation of procedure var_to_display [2022-11-03 02:26:55,597 INFO L130 BoogieDeclarations]: Found specification of procedure do_fbcon_takeover [2022-11-03 02:26:55,597 INFO L138 BoogieDeclarations]: Found implementation of procedure do_fbcon_takeover [2022-11-03 02:26:55,597 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-03 02:26:55,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 02:26:55,598 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 02:26:55,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 02:26:55,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-03 02:26:55,598 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-03 02:26:55,598 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 02:26:55,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 02:26:55,599 INFO L130 BoogieDeclarations]: Found specification of procedure con2fb_release_oldinfo [2022-11-03 02:26:55,599 INFO L138 BoogieDeclarations]: Found implementation of procedure con2fb_release_oldinfo [2022-11-03 02:26:55,599 INFO L130 BoogieDeclarations]: Found specification of procedure scr_memcpyw [2022-11-03 02:26:55,599 INFO L138 BoogieDeclarations]: Found implementation of procedure scr_memcpyw [2022-11-03 02:26:55,599 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_cursor [2022-11-03 02:26:55,600 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_cursor [2022-11-03 02:26:55,600 INFO L130 BoogieDeclarations]: Found specification of procedure get_default_font [2022-11-03 02:26:55,600 INFO L138 BoogieDeclarations]: Found implementation of procedure get_default_font [2022-11-03 02:26:55,600 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2022-11-03 02:26:55,600 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2022-11-03 02:26:55,600 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_putcs [2022-11-03 02:26:55,601 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_putcs [2022-11-03 02:26:55,601 INFO L130 BoogieDeclarations]: Found specification of procedure get_color [2022-11-03 02:26:55,601 INFO L138 BoogieDeclarations]: Found implementation of procedure get_color [2022-11-03 02:26:55,602 INFO L130 BoogieDeclarations]: Found specification of procedure scr_memsetw [2022-11-03 02:26:55,602 INFO L138 BoogieDeclarations]: Found implementation of procedure scr_memsetw [2022-11-03 02:26:55,602 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-03 02:26:55,602 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-03 02:26:55,602 INFO L130 BoogieDeclarations]: Found specification of procedure do_unregister_con_driver [2022-11-03 02:26:55,603 INFO L138 BoogieDeclarations]: Found implementation of procedure do_unregister_con_driver [2022-11-03 02:26:55,603 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 02:26:55,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 02:26:55,603 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_get_font [2022-11-03 02:26:55,603 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_get_font [2022-11-03 02:26:55,604 INFO L130 BoogieDeclarations]: Found specification of procedure real_y [2022-11-03 02:26:55,604 INFO L138 BoogieDeclarations]: Found implementation of procedure real_y [2022-11-03 02:26:55,605 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_update_softback [2022-11-03 02:26:55,605 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_update_softback [2022-11-03 02:26:55,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 02:26:55,606 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 02:26:55,606 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:26:55,606 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:26:55,606 INFO L130 BoogieDeclarations]: Found specification of procedure update_region [2022-11-03 02:26:55,607 INFO L138 BoogieDeclarations]: Found implementation of procedure update_region [2022-11-03 02:26:55,607 INFO L130 BoogieDeclarations]: Found specification of procedure fb_flashcursor [2022-11-03 02:26:55,607 INFO L138 BoogieDeclarations]: Found implementation of procedure fb_flashcursor [2022-11-03 02:26:55,607 INFO L130 BoogieDeclarations]: Found specification of procedure find_font [2022-11-03 02:26:55,608 INFO L138 BoogieDeclarations]: Found implementation of procedure find_font [2022-11-03 02:26:55,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:26:55,608 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_scrolldelta [2022-11-03 02:26:55,609 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_scrolldelta [2022-11-03 02:26:55,609 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-03 02:26:55,609 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_set_disp [2022-11-03 02:26:55,609 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_set_disp [2022-11-03 02:26:55,609 INFO L130 BoogieDeclarations]: Found specification of procedure module_put [2022-11-03 02:26:55,610 INFO L138 BoogieDeclarations]: Found implementation of procedure module_put [2022-11-03 02:26:55,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:26:55,610 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_clear_margins [2022-11-03 02:26:55,610 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_clear_margins [2022-11-03 02:26:55,611 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-03 02:26:55,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-03 02:26:55,611 INFO L130 BoogieDeclarations]: Found specification of procedure display_to_var [2022-11-03 02:26:55,612 INFO L138 BoogieDeclarations]: Found implementation of procedure display_to_var [2022-11-03 02:26:55,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:26:55,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:26:55,612 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 [2022-11-03 02:26:55,612 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 [2022-11-03 02:26:55,612 INFO L130 BoogieDeclarations]: Found specification of procedure try_module_get [2022-11-03 02:26:55,613 INFO L138 BoogieDeclarations]: Found implementation of procedure try_module_get [2022-11-03 02:26:55,613 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-03 02:26:55,614 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-03 02:26:55,614 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2022-11-03 02:26:55,614 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2022-11-03 02:26:55,614 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-03 02:26:55,614 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-03 02:26:55,615 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_debug_enter [2022-11-03 02:26:55,616 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_debug_enter [2022-11-03 02:26:55,616 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_del_cursor_timer [2022-11-03 02:26:55,616 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_del_cursor_timer [2022-11-03 02:26:55,617 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_redraw_move [2022-11-03 02:26:55,617 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_redraw_move [2022-11-03 02:26:55,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-03 02:26:55,618 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2022-11-03 02:26:55,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2022-11-03 02:26:55,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-03 02:26:55,618 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_is_inactive [2022-11-03 02:26:55,619 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_is_inactive [2022-11-03 02:26:55,619 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_clear [2022-11-03 02:26:55,619 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_clear [2022-11-03 02:26:55,619 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_add_cursor_timer [2022-11-03 02:26:55,619 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_add_cursor_timer [2022-11-03 02:26:55,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:26:55,620 INFO L130 BoogieDeclarations]: Found specification of procedure fb_set_var [2022-11-03 02:26:55,620 INFO L138 BoogieDeclarations]: Found implementation of procedure fb_set_var [2022-11-03 02:26:55,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-03 02:26:55,620 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-03 02:26:55,621 INFO L130 BoogieDeclarations]: Found specification of procedure set_blitting_type [2022-11-03 02:26:55,621 INFO L138 BoogieDeclarations]: Found implementation of procedure set_blitting_type [2022-11-03 02:26:55,622 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_bmove_rec [2022-11-03 02:26:55,624 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_bmove_rec [2022-11-03 02:26:55,625 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 02:26:55,625 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 02:26:55,625 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_set_palette [2022-11-03 02:26:55,625 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_set_palette [2022-11-03 02:26:55,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:26:55,628 INFO L130 BoogieDeclarations]: Found specification of procedure set_con2fb_map [2022-11-03 02:26:55,628 INFO L138 BoogieDeclarations]: Found implementation of procedure set_con2fb_map [2022-11-03 02:26:55,628 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_debug_leave [2022-11-03 02:26:55,635 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_debug_leave [2022-11-03 02:26:55,635 INFO L130 BoogieDeclarations]: Found specification of procedure console_conditional_schedule [2022-11-03 02:26:55,635 INFO L138 BoogieDeclarations]: Found implementation of procedure console_conditional_schedule [2022-11-03 02:26:55,635 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_copy_font [2022-11-03 02:26:55,635 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_copy_font [2022-11-03 02:26:55,636 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_do_set_font [2022-11-03 02:26:55,636 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_do_set_font [2022-11-03 02:26:55,636 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-03 02:26:55,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-03 02:26:55,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:26:55,636 INFO L130 BoogieDeclarations]: Found specification of procedure con2fb_acquire_newinfo [2022-11-03 02:26:55,637 INFO L138 BoogieDeclarations]: Found implementation of procedure con2fb_acquire_newinfo [2022-11-03 02:26:55,637 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-03 02:26:55,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-03 02:26:55,637 INFO L130 BoogieDeclarations]: Found specification of procedure fb_get_color_depth [2022-11-03 02:26:55,637 INFO L138 BoogieDeclarations]: Found implementation of procedure fb_get_color_depth [2022-11-03 02:26:55,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:26:55,638 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_prepare_logo [2022-11-03 02:26:55,638 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_prepare_logo [2022-11-03 02:26:55,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:26:55,638 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_redraw_blit [2022-11-03 02:26:55,638 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_redraw_blit [2022-11-03 02:26:55,638 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_2 [2022-11-03 02:26:55,639 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_2 [2022-11-03 02:26:55,639 INFO L130 BoogieDeclarations]: Found specification of procedure fb_videomode_to_var [2022-11-03 02:26:55,639 INFO L138 BoogieDeclarations]: Found implementation of procedure fb_videomode_to_var [2022-11-03 02:26:55,639 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~int~TO~VOID [2022-11-03 02:26:55,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~int~TO~VOID [2022-11-03 02:26:55,639 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2022-11-03 02:26:55,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2022-11-03 02:26:55,640 INFO L130 BoogieDeclarations]: Found specification of procedure console_lock [2022-11-03 02:26:55,640 INFO L138 BoogieDeclarations]: Found implementation of procedure console_lock [2022-11-03 02:26:55,640 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_modechanged [2022-11-03 02:26:55,640 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_modechanged [2022-11-03 02:26:55,640 INFO L130 BoogieDeclarations]: Found specification of procedure console_unlock [2022-11-03 02:26:55,641 INFO L138 BoogieDeclarations]: Found implementation of procedure console_unlock [2022-11-03 02:26:55,641 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_invert_region [2022-11-03 02:26:55,641 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_invert_region [2022-11-03 02:26:55,641 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_lock_of_fb_info [2022-11-03 02:26:55,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_lock_of_fb_info [2022-11-03 02:26:55,641 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_set_all_vcs [2022-11-03 02:26:55,642 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_set_all_vcs [2022-11-03 02:26:55,642 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_redraw [2022-11-03 02:26:55,642 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_redraw [2022-11-03 02:26:55,642 INFO L130 BoogieDeclarations]: Found specification of procedure updatescrollmode [2022-11-03 02:26:55,642 INFO L138 BoogieDeclarations]: Found implementation of procedure updatescrollmode [2022-11-03 02:26:55,642 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_switch [2022-11-03 02:26:55,643 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_switch [2022-11-03 02:26:55,643 INFO L130 BoogieDeclarations]: Found specification of procedure vc_resize [2022-11-03 02:26:55,643 INFO L138 BoogieDeclarations]: Found implementation of procedure vc_resize [2022-11-03 02:26:55,643 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-03 02:26:55,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-03 02:26:55,643 INFO L130 BoogieDeclarations]: Found specification of procedure redraw_screen [2022-11-03 02:26:55,644 INFO L138 BoogieDeclarations]: Found implementation of procedure redraw_screen [2022-11-03 02:26:55,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:26:55,644 INFO L130 BoogieDeclarations]: Found specification of procedure search_fb_in_map [2022-11-03 02:26:55,644 INFO L138 BoogieDeclarations]: Found implementation of procedure search_fb_in_map [2022-11-03 02:26:55,644 INFO L130 BoogieDeclarations]: Found specification of procedure con_set_default_unimap [2022-11-03 02:26:55,644 INFO L138 BoogieDeclarations]: Found implementation of procedure con_set_default_unimap [2022-11-03 02:26:55,645 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2022-11-03 02:26:55,645 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2022-11-03 02:26:55,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:26:55,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:26:55,645 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-11-03 02:26:55,645 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-11-03 02:26:56,665 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:26:56,668 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:26:59,463 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 02:27:27,328 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:27:32,579 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:27:32,579 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 02:27:32,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:27:32 BoogieIcfgContainer [2022-11-03 02:27:32,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:27:32,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:27:32,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:27:32,593 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:27:32,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:26:51" (1/3) ... [2022-11-03 02:27:32,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75abc330 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:27:32, skipping insertion in model container [2022-11-03 02:27:32,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:54" (2/3) ... [2022-11-03 02:27:32,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75abc330 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:27:32, skipping insertion in model container [2022-11-03 02:27:32,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:27:32" (3/3) ... [2022-11-03 02:27:32,600 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--video--console--fbcon.ko-entry_point.cil.out.i [2022-11-03 02:27:32,633 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:27:32,634 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:27:32,722 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:27:32,728 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;@5a3732d5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:27:32,729 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:27:32,739 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) [2022-11-03 02:27:32,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2022-11-03 02:27:32,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:32,791 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] [2022-11-03 02:27:32,792 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:32,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:32,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1121412808, now seen corresponding path program 1 times [2022-11-03 02:27:32,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:32,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387113757] [2022-11-03 02:27:32,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:32,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:34,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4207 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4207 trivial. 0 not checked. [2022-11-03 02:27:34,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:34,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387113757] [2022-11-03 02:27:34,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387113757] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:34,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:34,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:27:34,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776031460] [2022-11-03 02:27:34,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:34,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:27:34,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:34,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:27:34,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:27:34,557 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) [2022-11-03 02:27:36,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:27:38,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:27:40,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:27:43,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:27:49,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:27:51,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:51,392 INFO L93 Difference]: Finished difference Result 4121 states and 6156 transitions. [2022-11-03 02:27:51,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:27:51,399 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 [2022-11-03 02:27:51,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:51,456 INFO L225 Difference]: With dead ends: 4121 [2022-11-03 02:27:51,457 INFO L226 Difference]: Without dead ends: 2724 [2022-11-03 02:27:51,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:27:51,476 INFO L413 NwaCegarLoop]: 2299 mSDtfsCounter, 1910 mSDsluCounter, 2136 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 3 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1914 SdHoareTripleChecker+Valid, 4209 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:51,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1914 Valid, 4209 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 480 Invalid, 4 Unknown, 0 Unchecked, 16.5s Time] [2022-11-03 02:27:51,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2022-11-03 02:27:51,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 2719. [2022-11-03 02:27:51,746 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) [2022-11-03 02:27:51,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2719 states to 2719 states and 4046 transitions. [2022-11-03 02:27:51,776 INFO L78 Accepts]: Start accepts. Automaton has 2719 states and 4046 transitions. Word has length 433 [2022-11-03 02:27:51,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:51,783 INFO L495 AbstractCegarLoop]: Abstraction has 2719 states and 4046 transitions. [2022-11-03 02:27:51,783 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) [2022-11-03 02:27:51,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2719 states and 4046 transitions. [2022-11-03 02:27:51,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-03 02:27:51,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:51,814 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] [2022-11-03 02:27:51,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:27:51,815 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:51,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:51,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1668106708, now seen corresponding path program 1 times [2022-11-03 02:27:51,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:51,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234001983] [2022-11-03 02:27:51,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:51,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4207 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4207 trivial. 0 not checked. [2022-11-03 02:27:53,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:53,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234001983] [2022-11-03 02:27:53,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234001983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:53,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:53,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:27:53,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919635053] [2022-11-03 02:27:53,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:53,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:27:53,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:53,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:27:53,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:27:53,020 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) [2022-11-03 02:27:55,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:27:57,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:28:00,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:28:02,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:28:06,746 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 [] [2022-11-03 02:28:08,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:08,895 INFO L93 Difference]: Finished difference Result 5350 states and 7963 transitions. [2022-11-03 02:28:08,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:28:08,896 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 [2022-11-03 02:28:08,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:08,916 INFO L225 Difference]: With dead ends: 5350 [2022-11-03 02:28:08,916 INFO L226 Difference]: Without dead ends: 2720 [2022-11-03 02:28:08,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:28:08,929 INFO L413 NwaCegarLoop]: 1942 mSDtfsCounter, 0 mSDsluCounter, 2171 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3881 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:08,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3881 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 467 Invalid, 5 Unknown, 0 Unchecked, 15.7s Time] [2022-11-03 02:28:08,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2720 states. [2022-11-03 02:28:09,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2720 to 2720. [2022-11-03 02:28:09,020 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) [2022-11-03 02:28:09,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2720 states to 2720 states and 4047 transitions. [2022-11-03 02:28:09,037 INFO L78 Accepts]: Start accepts. Automaton has 2720 states and 4047 transitions. Word has length 438 [2022-11-03 02:28:09,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:09,042 INFO L495 AbstractCegarLoop]: Abstraction has 2720 states and 4047 transitions. [2022-11-03 02:28:09,042 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) [2022-11-03 02:28:09,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2720 states and 4047 transitions. [2022-11-03 02:28:09,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2022-11-03 02:28:09,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:09,057 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] [2022-11-03 02:28:09,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:28:09,058 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:09,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:09,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1055585361, now seen corresponding path program 1 times [2022-11-03 02:28:09,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:09,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117220669] [2022-11-03 02:28:09,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:09,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:09,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:10,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4207 trivial. 0 not checked. [2022-11-03 02:28:10,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:10,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117220669] [2022-11-03 02:28:10,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117220669] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:28:10,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658506495] [2022-11-03 02:28:10,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:10,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:10,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:10,013 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:10,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:28:12,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:12,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 4809 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:28:12,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4208 trivial. 0 not checked. [2022-11-03 02:28:13,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:28:13,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658506495] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:13,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:28:13,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-03 02:28:13,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257419210] [2022-11-03 02:28:13,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:13,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:28:13,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:13,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:28:13,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:28:13,815 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) [2022-11-03 02:28:15,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:28:17,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:28:18,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:28:21,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:28:25,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:28:27,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:28:29,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:29,268 INFO L93 Difference]: Finished difference Result 5293 states and 7870 transitions. [2022-11-03 02:28:29,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:28:29,269 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 [2022-11-03 02:28:29,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:29,305 INFO L225 Difference]: With dead ends: 5293 [2022-11-03 02:28:29,305 INFO L226 Difference]: Without dead ends: 5290 [2022-11-03 02:28:29,310 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 [2022-11-03 02:28:29,313 INFO L413 NwaCegarLoop]: 2339 mSDtfsCounter, 1911 mSDsluCounter, 2032 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1915 SdHoareTripleChecker+Valid, 4141 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:29,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1915 Valid, 4141 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 478 Invalid, 3 Unknown, 0 Unchecked, 15.3s Time] [2022-11-03 02:28:29,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5290 states. [2022-11-03 02:28:29,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5290 to 5285. [2022-11-03 02:28:29,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5285 states, 3627 states have (on average 1.4295561069754619) internal successors, (5185), 3791 states have internal predecessors, (5185), 1342 states have call successors, (1342), 322 states have call predecessors, (1342), 315 states have return successors, (1336), 1285 states have call predecessors, (1336), 1336 states have call successors, (1336) [2022-11-03 02:28:29,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5285 states to 5285 states and 7863 transitions. [2022-11-03 02:28:29,545 INFO L78 Accepts]: Start accepts. Automaton has 5285 states and 7863 transitions. Word has length 439 [2022-11-03 02:28:29,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:29,547 INFO L495 AbstractCegarLoop]: Abstraction has 5285 states and 7863 transitions. [2022-11-03 02:28:29,547 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) [2022-11-03 02:28:29,548 INFO L276 IsEmpty]: Start isEmpty. Operand 5285 states and 7863 transitions. [2022-11-03 02:28:29,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2022-11-03 02:28:29,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:29,562 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] [2022-11-03 02:28:29,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:29,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:29,778 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:29,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:29,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1636059588, now seen corresponding path program 1 times [2022-11-03 02:28:29,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:29,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489782751] [2022-11-03 02:28:29,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:29,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:30,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:30,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4207 trivial. 0 not checked. [2022-11-03 02:28:30,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:30,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489782751] [2022-11-03 02:28:30,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489782751] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:28:30,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370302211] [2022-11-03 02:28:30,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:30,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:30,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:30,731 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:30,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:28:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:32,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 4811 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:28:32,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:34,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4208 trivial. 0 not checked. [2022-11-03 02:28:34,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:28:34,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370302211] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:34,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:28:34,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-03 02:28:34,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118309965] [2022-11-03 02:28:34,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:34,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:28:34,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:34,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:28:34,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:28:34,270 INFO L87 Difference]: Start difference. First operand 5285 states and 7863 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) [2022-11-03 02:28:36,293 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 [] [2022-11-03 02:28:38,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:28:40,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:28:42,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:28:45,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:28:49,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:28:50,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:28:51,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:51,590 INFO L93 Difference]: Finished difference Result 5294 states and 7871 transitions. [2022-11-03 02:28:51,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:28:51,591 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 [2022-11-03 02:28:51,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:51,624 INFO L225 Difference]: With dead ends: 5294 [2022-11-03 02:28:51,624 INFO L226 Difference]: Without dead ends: 5291 [2022-11-03 02:28:51,628 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 [2022-11-03 02:28:51,632 INFO L413 NwaCegarLoop]: 2343 mSDtfsCounter, 1906 mSDsluCounter, 2034 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 1 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1911 SdHoareTripleChecker+Valid, 4148 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:51,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1911 Valid, 4148 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 473 Invalid, 6 Unknown, 0 Unchecked, 17.2s Time] [2022-11-03 02:28:51,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5291 states. [2022-11-03 02:28:51,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5291 to 5286. [2022-11-03 02:28:51,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5286 states, 3628 states have (on average 1.4294377067254687) internal successors, (5186), 3792 states have internal predecessors, (5186), 1342 states have call successors, (1342), 322 states have call predecessors, (1342), 315 states have return successors, (1336), 1285 states have call predecessors, (1336), 1336 states have call successors, (1336) [2022-11-03 02:28:51,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5286 states to 5286 states and 7864 transitions. [2022-11-03 02:28:51,890 INFO L78 Accepts]: Start accepts. Automaton has 5286 states and 7864 transitions. Word has length 440 [2022-11-03 02:28:51,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:51,891 INFO L495 AbstractCegarLoop]: Abstraction has 5286 states and 7864 transitions. [2022-11-03 02:28:51,892 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) [2022-11-03 02:28:51,892 INFO L276 IsEmpty]: Start isEmpty. Operand 5286 states and 7864 transitions. [2022-11-03 02:28:51,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2022-11-03 02:28:51,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:51,907 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] [2022-11-03 02:28:51,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:52,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:52,134 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:52,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:52,134 INFO L85 PathProgramCache]: Analyzing trace with hash -822288046, now seen corresponding path program 1 times [2022-11-03 02:28:52,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:52,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292972369] [2022-11-03 02:28:52,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:52,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:53,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4207 trivial. 0 not checked. [2022-11-03 02:28:53,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:53,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292972369] [2022-11-03 02:28:53,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292972369] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:28:53,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793157488] [2022-11-03 02:28:53,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:53,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:53,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:53,058 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:53,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:28:55,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:55,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 4813 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:28:55,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4208 trivial. 0 not checked. [2022-11-03 02:28:56,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:28:56,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793157488] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:56,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:28:56,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-03 02:28:56,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491691534] [2022-11-03 02:28:56,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:56,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:28:56,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:56,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:28:56,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:28:56,609 INFO L87 Difference]: Start difference. First operand 5286 states and 7864 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) [2022-11-03 02:28:58,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:29:00,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:29:02,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:29:05,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:29:08,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:29:10,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:29:14,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:29:16,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:29:18,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:29:18,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:29:18,978 INFO L93 Difference]: Finished difference Result 13083 states and 19450 transitions. [2022-11-03 02:29:18,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:29:18,979 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 [2022-11-03 02:29:18,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:29:19,028 INFO L225 Difference]: With dead ends: 13083 [2022-11-03 02:29:19,029 INFO L226 Difference]: Without dead ends: 7886 [2022-11-03 02:29:19,054 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 [2022-11-03 02:29:19,055 INFO L413 NwaCegarLoop]: 2343 mSDtfsCounter, 1872 mSDsluCounter, 2028 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 3 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1881 SdHoareTripleChecker+Valid, 4146 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:29:19,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1881 Valid, 4146 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 471 Invalid, 8 Unknown, 0 Unchecked, 22.1s Time] [2022-11-03 02:29:19,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7886 states. [2022-11-03 02:29:19,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7886 to 7862. [2022-11-03 02:29:19,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7862 states, 5405 states have (on average 1.4308973172987973) internal successors, (7734), 5651 states have internal predecessors, (7734), 1971 states have call successors, (1971), 497 states have call predecessors, (1971), 485 states have return successors, (1974), 1883 states have call predecessors, (1974), 1964 states have call successors, (1974) [2022-11-03 02:29:19,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7862 states to 7862 states and 11679 transitions. [2022-11-03 02:29:19,445 INFO L78 Accepts]: Start accepts. Automaton has 7862 states and 11679 transitions. Word has length 441 [2022-11-03 02:29:19,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:29:19,446 INFO L495 AbstractCegarLoop]: Abstraction has 7862 states and 11679 transitions. [2022-11-03 02:29:19,446 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) [2022-11-03 02:29:19,447 INFO L276 IsEmpty]: Start isEmpty. Operand 7862 states and 11679 transitions. [2022-11-03 02:29:19,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2022-11-03 02:29:19,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:29:19,457 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] [2022-11-03 02:29:19,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:19,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:19,674 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:29:19,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:19,674 INFO L85 PathProgramCache]: Analyzing trace with hash 278351495, now seen corresponding path program 1 times [2022-11-03 02:29:19,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:29:19,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632242008] [2022-11-03 02:29:19,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:19,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:29:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:20,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4207 trivial. 0 not checked. [2022-11-03 02:29:20,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:29:20,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632242008] [2022-11-03 02:29:20,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632242008] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:29:20,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365772265] [2022-11-03 02:29:20,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:20,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:20,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:29:20,528 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:29:20,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:29:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:22,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 4815 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:29:22,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:24,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4208 trivial. 0 not checked. [2022-11-03 02:29:24,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:29:24,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365772265] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:29:24,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:29:24,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-03 02:29:24,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450134991] [2022-11-03 02:29:24,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:29:24,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:29:24,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:29:24,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:29:24,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:29:24,129 INFO L87 Difference]: Start difference. First operand 7862 states and 11679 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) [2022-11-03 02:29:26,148 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 [] [2022-11-03 02:29:28,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:29:30,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:29:32,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:29:35,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:29:39,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:29:40,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:29:42,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:29:42,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:29:42,982 INFO L93 Difference]: Finished difference Result 7891 states and 11705 transitions. [2022-11-03 02:29:42,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:29:42,983 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 [2022-11-03 02:29:42,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:29:43,046 INFO L225 Difference]: With dead ends: 7891 [2022-11-03 02:29:43,046 INFO L226 Difference]: Without dead ends: 7888 [2022-11-03 02:29:43,052 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 [2022-11-03 02:29:43,053 INFO L413 NwaCegarLoop]: 2348 mSDtfsCounter, 1888 mSDsluCounter, 2039 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 1 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1896 SdHoareTripleChecker+Valid, 4159 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:29:43,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1896 Valid, 4159 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 471 Invalid, 7 Unknown, 0 Unchecked, 18.7s Time] [2022-11-03 02:29:43,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7888 states. [2022-11-03 02:29:43,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7888 to 7876. [2022-11-03 02:29:43,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7876 states, 5413 states have (on average 1.430260484019952) internal successors, (7742), 5659 states have internal predecessors, (7742), 1971 states have call successors, (1971), 503 states have call predecessors, (1971), 491 states have return successors, (1974), 1883 states have call predecessors, (1974), 1964 states have call successors, (1974) [2022-11-03 02:29:43,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7876 states to 7876 states and 11687 transitions. [2022-11-03 02:29:43,413 INFO L78 Accepts]: Start accepts. Automaton has 7876 states and 11687 transitions. Word has length 442 [2022-11-03 02:29:43,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:29:43,414 INFO L495 AbstractCegarLoop]: Abstraction has 7876 states and 11687 transitions. [2022-11-03 02:29:43,414 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) [2022-11-03 02:29:43,414 INFO L276 IsEmpty]: Start isEmpty. Operand 7876 states and 11687 transitions. [2022-11-03 02:29:43,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2022-11-03 02:29:43,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:29:43,425 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] [2022-11-03 02:29:43,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:43,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 02:29:43,642 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:29:43,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:43,642 INFO L85 PathProgramCache]: Analyzing trace with hash 38443765, now seen corresponding path program 1 times [2022-11-03 02:29:43,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:29:43,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062942114] [2022-11-03 02:29:43,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:43,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:29:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:44,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4207 trivial. 0 not checked. [2022-11-03 02:29:44,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:29:44,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062942114] [2022-11-03 02:29:44,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062942114] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:29:44,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256652729] [2022-11-03 02:29:44,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:44,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:44,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:29:44,399 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:29:44,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:29:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:46,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 4817 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:29:46,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:48,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4208 trivial. 0 not checked. [2022-11-03 02:29:48,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:29:48,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256652729] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:29:48,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:29:48,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-03 02:29:48,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998499368] [2022-11-03 02:29:48,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:29:48,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:29:48,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:29:48,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:29:48,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:29:48,016 INFO L87 Difference]: Start difference. First operand 7876 states and 11687 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) [2022-11-03 02:29:49,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:29:51,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:29:53,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:29:54,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:29:57,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:30:01,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:30:03,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:30:06,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:30:06,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:06,291 INFO L93 Difference]: Finished difference Result 7892 states and 11703 transitions. [2022-11-03 02:30:06,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:30:06,292 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 [2022-11-03 02:30:06,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:06,332 INFO L225 Difference]: With dead ends: 7892 [2022-11-03 02:30:06,332 INFO L226 Difference]: Without dead ends: 7867 [2022-11-03 02:30:06,341 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 [2022-11-03 02:30:06,341 INFO L413 NwaCegarLoop]: 2342 mSDtfsCounter, 1861 mSDsluCounter, 2043 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1868 SdHoareTripleChecker+Valid, 4156 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:06,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1868 Valid, 4156 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 474 Invalid, 5 Unknown, 0 Unchecked, 18.1s Time] [2022-11-03 02:30:06,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7867 states. [2022-11-03 02:30:06,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7867 to 7855. [2022-11-03 02:30:06,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7855 states, 5399 states have (on average 1.4304500833487683) internal successors, (7723), 5645 states have internal predecessors, (7723), 1966 states have call successors, (1966), 501 states have call predecessors, (1966), 489 states have return successors, (1969), 1878 states have call predecessors, (1969), 1959 states have call successors, (1969) [2022-11-03 02:30:06,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7855 states to 7855 states and 11658 transitions. [2022-11-03 02:30:06,697 INFO L78 Accepts]: Start accepts. Automaton has 7855 states and 11658 transitions. Word has length 443 [2022-11-03 02:30:06,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:06,698 INFO L495 AbstractCegarLoop]: Abstraction has 7855 states and 11658 transitions. [2022-11-03 02:30:06,698 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) [2022-11-03 02:30:06,699 INFO L276 IsEmpty]: Start isEmpty. Operand 7855 states and 11658 transitions. [2022-11-03 02:30:06,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2022-11-03 02:30:06,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:06,711 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] [2022-11-03 02:30:06,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:06,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:06,934 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:06,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:06,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1260020647, now seen corresponding path program 1 times [2022-11-03 02:30:06,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:06,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595977897] [2022-11-03 02:30:06,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:06,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:07,207 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:30:07,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940183253] [2022-11-03 02:30:07,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:07,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:07,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:07,209 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:07,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:30:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:09,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 5599 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:30:09,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4209 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4209 trivial. 0 not checked. [2022-11-03 02:30:09,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:09,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:09,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595977897] [2022-11-03 02:30:09,937 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:30:09,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940183253] [2022-11-03 02:30:09,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940183253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:09,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:09,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:30:09,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976906386] [2022-11-03 02:30:09,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:09,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:30:09,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:09,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:30:09,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:30:09,940 INFO L87 Difference]: Start difference. First operand 7855 states and 11658 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) [2022-11-03 02:30:11,964 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 [] [2022-11-03 02:30:14,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:30:16,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:30:18,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:30:21,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:30:23,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:30:26,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:30:27,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:30:28,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:28,046 INFO L93 Difference]: Finished difference Result 12352 states and 18233 transitions. [2022-11-03 02:30:28,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:30:28,047 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 [2022-11-03 02:30:28,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:28,115 INFO L225 Difference]: With dead ends: 12352 [2022-11-03 02:30:28,115 INFO L226 Difference]: Without dead ends: 11641 [2022-11-03 02:30:28,129 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 [2022-11-03 02:30:28,130 INFO L413 NwaCegarLoop]: 2263 mSDtfsCounter, 1910 mSDsluCounter, 2121 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 2 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1918 SdHoareTripleChecker+Valid, 4161 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:28,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1918 Valid, 4161 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 468 Invalid, 6 Unknown, 0 Unchecked, 17.8s Time] [2022-11-03 02:30:28,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11641 states. [2022-11-03 02:30:28,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11641 to 11631. [2022-11-03 02:30:28,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11631 states, 8007 states have (on average 1.4321218933433246) internal successors, (11467), 8370 states have internal predecessors, (11467), 2898 states have call successors, (2898), 742 states have call predecessors, (2898), 725 states have return successors, (2915), 2770 states have call predecessors, (2915), 2891 states have call successors, (2915) [2022-11-03 02:30:28,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11631 states to 11631 states and 17280 transitions. [2022-11-03 02:30:28,668 INFO L78 Accepts]: Start accepts. Automaton has 11631 states and 17280 transitions. Word has length 446 [2022-11-03 02:30:28,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:28,668 INFO L495 AbstractCegarLoop]: Abstraction has 11631 states and 17280 transitions. [2022-11-03 02:30:28,669 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) [2022-11-03 02:30:28,669 INFO L276 IsEmpty]: Start isEmpty. Operand 11631 states and 17280 transitions. [2022-11-03 02:30:28,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2022-11-03 02:30:28,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:28,686 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] [2022-11-03 02:30:28,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:28,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:28,914 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:28,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:28,914 INFO L85 PathProgramCache]: Analyzing trace with hash -254081314, now seen corresponding path program 1 times [2022-11-03 02:30:28,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:28,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565025066] [2022-11-03 02:30:28,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:28,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:29,218 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:30:29,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335768205] [2022-11-03 02:30:29,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:29,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:29,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:29,220 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:29,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:30:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:31,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 5578 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:30:31,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4210 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4208 trivial. 0 not checked. [2022-11-03 02:30:32,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:32,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:32,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565025066] [2022-11-03 02:30:32,006 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:30:32,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335768205] [2022-11-03 02:30:32,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335768205] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:32,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:32,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:30:32,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271406078] [2022-11-03 02:30:32,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:32,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:30:32,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:32,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:30:32,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:30:32,009 INFO L87 Difference]: Start difference. First operand 11631 states and 17280 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) [2022-11-03 02:30:34,034 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 [] [2022-11-03 02:30:36,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:30:38,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:30:41,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:30:42,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:30:44,846 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 [] [2022-11-03 02:30:47,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:47,622 INFO L93 Difference]: Finished difference Result 29470 states and 43573 transitions. [2022-11-03 02:30:47,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:30:47,622 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 [2022-11-03 02:30:47,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:47,720 INFO L225 Difference]: With dead ends: 29470 [2022-11-03 02:30:47,720 INFO L226 Difference]: Without dead ends: 17928 [2022-11-03 02:30:47,784 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 [2022-11-03 02:30:47,785 INFO L413 NwaCegarLoop]: 2145 mSDtfsCounter, 1069 mSDsluCounter, 2103 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 24 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 4021 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:47,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1073 Valid, 4021 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 562 Invalid, 5 Unknown, 0 Unchecked, 15.1s Time] [2022-11-03 02:30:47,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17928 states. [2022-11-03 02:30:48,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17928 to 17878. [2022-11-03 02:30:48,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17878 states, 12412 states have (on average 1.4311956171446987) internal successors, (17764), 12952 states have internal predecessors, (17764), 4189 states have call successors, (4189), 1310 states have call predecessors, (4189), 1276 states have return successors, (4218), 4000 states have call predecessors, (4218), 4182 states have call successors, (4218) [2022-11-03 02:30:48,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17878 states to 17878 states and 26171 transitions. [2022-11-03 02:30:48,649 INFO L78 Accepts]: Start accepts. Automaton has 17878 states and 26171 transitions. Word has length 452 [2022-11-03 02:30:48,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:48,650 INFO L495 AbstractCegarLoop]: Abstraction has 17878 states and 26171 transitions. [2022-11-03 02:30:48,650 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) [2022-11-03 02:30:48,650 INFO L276 IsEmpty]: Start isEmpty. Operand 17878 states and 26171 transitions. [2022-11-03 02:30:48,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2022-11-03 02:30:48,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:48,677 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] [2022-11-03 02:30:48,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:48,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:48,906 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:48,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:48,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1855843335, now seen corresponding path program 1 times [2022-11-03 02:30:48,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:48,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395628351] [2022-11-03 02:30:48,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:48,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:49,209 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:30:49,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [123625403] [2022-11-03 02:30:49,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:49,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:49,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:49,211 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:49,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:30:52,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:52,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 5884 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:30:52,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4392 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4392 trivial. 0 not checked. [2022-11-03 02:30:53,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:53,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:53,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395628351] [2022-11-03 02:30:53,639 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:30:53,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123625403] [2022-11-03 02:30:53,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123625403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:53,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:53,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:30:53,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365764697] [2022-11-03 02:30:53,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:53,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:30:53,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:53,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:30:53,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:30:53,643 INFO L87 Difference]: Start difference. First operand 17878 states and 26171 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) [2022-11-03 02:30:55,670 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 [] [2022-11-03 02:30:58,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:31:00,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:31:02,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:31:05,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:31:07,610 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 [] [2022-11-03 02:31:08,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:08,907 INFO L93 Difference]: Finished difference Result 18232 states and 26581 transitions. [2022-11-03 02:31:08,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:31:08,908 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 [2022-11-03 02:31:08,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:09,010 INFO L225 Difference]: With dead ends: 18232 [2022-11-03 02:31:09,010 INFO L226 Difference]: Without dead ends: 18229 [2022-11-03 02:31:09,025 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 [2022-11-03 02:31:09,026 INFO L413 NwaCegarLoop]: 2047 mSDtfsCounter, 1871 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1878 SdHoareTripleChecker+Valid, 2415 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:09,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1878 Valid, 2415 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 300 Invalid, 6 Unknown, 0 Unchecked, 14.8s Time] [2022-11-03 02:31:09,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18229 states. [2022-11-03 02:31:10,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18229 to 18203. [2022-11-03 02:31:10,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18203 states, 12616 states have (on average 1.428424223208624) internal successors, (18021), 13165 states have internal predecessors, (18021), 4241 states have call successors, (4241), 1375 states have call predecessors, (4241), 1345 states have return successors, (4283), 4050 states have call predecessors, (4283), 4235 states have call successors, (4283) [2022-11-03 02:31:10,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18203 states to 18203 states and 26545 transitions. [2022-11-03 02:31:10,125 INFO L78 Accepts]: Start accepts. Automaton has 18203 states and 26545 transitions. Word has length 502 [2022-11-03 02:31:10,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:10,126 INFO L495 AbstractCegarLoop]: Abstraction has 18203 states and 26545 transitions. [2022-11-03 02:31:10,126 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) [2022-11-03 02:31:10,127 INFO L276 IsEmpty]: Start isEmpty. Operand 18203 states and 26545 transitions. [2022-11-03 02:31:10,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2022-11-03 02:31:10,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:10,152 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] [2022-11-03 02:31:10,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:10,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:31:10,366 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:10,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:10,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1696035948, now seen corresponding path program 1 times [2022-11-03 02:31:10,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:10,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156288802] [2022-11-03 02:31:10,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:10,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:10,844 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:31:10,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269319616] [2022-11-03 02:31:10,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:10,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:10,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:10,846 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:31:10,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:31:13,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:13,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 5886 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:31:13,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:15,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4392 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4392 trivial. 0 not checked. [2022-11-03 02:31:15,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:15,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:31:15,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156288802] [2022-11-03 02:31:15,313 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:31:15,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269319616] [2022-11-03 02:31:15,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269319616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:15,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:15,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:31:15,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548233840] [2022-11-03 02:31:15,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:15,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:31:15,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:15,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:31:15,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:31:15,317 INFO L87 Difference]: Start difference. First operand 18203 states and 26545 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) [2022-11-03 02:31:18,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:31:20,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:31:22,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:31:24,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:31:27,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:31:29,463 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 [] [2022-11-03 02:31:30,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:30,575 INFO L93 Difference]: Finished difference Result 18219 states and 26566 transitions. [2022-11-03 02:31:30,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:31:30,576 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 [2022-11-03 02:31:30,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:30,660 INFO L225 Difference]: With dead ends: 18219 [2022-11-03 02:31:30,660 INFO L226 Difference]: Without dead ends: 18216 [2022-11-03 02:31:30,671 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 [2022-11-03 02:31:30,672 INFO L413 NwaCegarLoop]: 2045 mSDtfsCounter, 1868 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1875 SdHoareTripleChecker+Valid, 2413 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:30,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1875 Valid, 2413 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 302 Invalid, 5 Unknown, 0 Unchecked, 14.7s Time] [2022-11-03 02:31:30,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18216 states. [2022-11-03 02:31:31,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18216 to 18202. [2022-11-03 02:31:31,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18202 states, 12616 states have (on average 1.428265694356373) internal successors, (18019), 13164 states have internal predecessors, (18019), 4240 states have call successors, (4240), 1375 states have call predecessors, (4240), 1345 states have return successors, (4283), 4050 states have call predecessors, (4283), 4235 states have call successors, (4283) [2022-11-03 02:31:31,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18202 states to 18202 states and 26542 transitions. [2022-11-03 02:31:31,717 INFO L78 Accepts]: Start accepts. Automaton has 18202 states and 26542 transitions. Word has length 503 [2022-11-03 02:31:31,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:31,718 INFO L495 AbstractCegarLoop]: Abstraction has 18202 states and 26542 transitions. [2022-11-03 02:31:31,718 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) [2022-11-03 02:31:31,718 INFO L276 IsEmpty]: Start isEmpty. Operand 18202 states and 26542 transitions. [2022-11-03 02:31:31,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2022-11-03 02:31:31,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:31,745 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] [2022-11-03 02:31:31,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:31,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:31,962 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:31,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:31,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1036979114, now seen corresponding path program 1 times [2022-11-03 02:31:31,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:31,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538539702] [2022-11-03 02:31:31,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:31,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:32,292 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:31:32,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1690538844] [2022-11-03 02:31:32,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:32,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:32,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:32,294 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:31:32,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:31:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:35,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 5888 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:31:35,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:36,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4392 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4392 trivial. 0 not checked. [2022-11-03 02:31:36,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:36,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:31:36,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538539702] [2022-11-03 02:31:36,869 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:31:36,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690538844] [2022-11-03 02:31:36,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690538844] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:36,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:36,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:31:36,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890026103] [2022-11-03 02:31:36,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:36,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:31:36,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:36,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:31:36,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:31:36,872 INFO L87 Difference]: Start difference. First operand 18202 states and 26542 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) [2022-11-03 02:31:37,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:31:40,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:31:41,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:31:43,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:31:45,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:31:48,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:31:50,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:31:52,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:31:55,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:31:56,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:56,129 INFO L93 Difference]: Finished difference Result 24997 states and 36311 transitions. [2022-11-03 02:31:56,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:31:56,129 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 [2022-11-03 02:31:56,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:56,172 INFO L225 Difference]: With dead ends: 24997 [2022-11-03 02:31:56,172 INFO L226 Difference]: Without dead ends: 12885 [2022-11-03 02:31:56,204 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 [2022-11-03 02:31:56,204 INFO L413 NwaCegarLoop]: 2056 mSDtfsCounter, 1850 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 1 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1860 SdHoareTripleChecker+Valid, 2446 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:56,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1860 Valid, 2446 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 308 Invalid, 7 Unknown, 0 Unchecked, 18.8s Time] [2022-11-03 02:31:56,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12885 states. [2022-11-03 02:31:56,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12885 to 12632. [2022-11-03 02:31:56,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12632 states, 8702 states have (on average 1.42461503102735) internal successors, (12397), 9096 states have internal predecessors, (12397), 2944 states have call successors, (2944), 1007 states have call predecessors, (2944), 985 states have return successors, (2956), 2803 states have call predecessors, (2956), 2940 states have call successors, (2956) [2022-11-03 02:31:56,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12632 states to 12632 states and 18297 transitions. [2022-11-03 02:31:56,866 INFO L78 Accepts]: Start accepts. Automaton has 12632 states and 18297 transitions. Word has length 504 [2022-11-03 02:31:56,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:56,867 INFO L495 AbstractCegarLoop]: Abstraction has 12632 states and 18297 transitions. [2022-11-03 02:31:56,867 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) [2022-11-03 02:31:56,867 INFO L276 IsEmpty]: Start isEmpty. Operand 12632 states and 18297 transitions. [2022-11-03 02:31:56,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2022-11-03 02:31:56,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:56,894 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] [2022-11-03 02:31:56,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:57,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:57,110 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:57,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:57,110 INFO L85 PathProgramCache]: Analyzing trace with hash 2081058607, now seen corresponding path program 1 times [2022-11-03 02:31:57,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:57,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210372539] [2022-11-03 02:31:57,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:57,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:57,396 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:31:57,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [404098103] [2022-11-03 02:31:57,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:57,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:57,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:57,398 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:31:57,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:32:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:00,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 5890 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:32:00,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4392 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4392 trivial. 0 not checked. [2022-11-03 02:32:02,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:32:02,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:32:02,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210372539] [2022-11-03 02:32:02,177 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:32:02,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404098103] [2022-11-03 02:32:02,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404098103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:32:02,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:32:02,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:32:02,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812191354] [2022-11-03 02:32:02,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:32:02,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:32:02,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:32:02,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:32:02,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:32:02,180 INFO L87 Difference]: Start difference. First operand 12632 states and 18297 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) [2022-11-03 02:32:03,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:32:05,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:32:07,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:32:10,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:32:13,886 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 [] [2022-11-03 02:32:15,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:32:15,025 INFO L93 Difference]: Finished difference Result 12642 states and 18303 transitions. [2022-11-03 02:32:15,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:32:15,026 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 [2022-11-03 02:32:15,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:32:15,074 INFO L225 Difference]: With dead ends: 12642 [2022-11-03 02:32:15,074 INFO L226 Difference]: Without dead ends: 12639 [2022-11-03 02:32:15,080 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 [2022-11-03 02:32:15,080 INFO L413 NwaCegarLoop]: 2037 mSDtfsCounter, 1885 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1890 SdHoareTripleChecker+Valid, 2377 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:32:15,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1890 Valid, 2377 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 291 Invalid, 4 Unknown, 0 Unchecked, 12.3s Time] [2022-11-03 02:32:15,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12639 states. [2022-11-03 02:32:15,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12639 to 12633. [2022-11-03 02:32:15,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12633 states, 8703 states have (on average 1.424451338618867) internal successors, (12397), 9096 states have internal predecessors, (12397), 2942 states have call successors, (2942), 1009 states have call predecessors, (2942), 987 states have return successors, (2955), 2802 states have call predecessors, (2955), 2939 states have call successors, (2955) [2022-11-03 02:32:15,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12633 states to 12633 states and 18294 transitions. [2022-11-03 02:32:15,646 INFO L78 Accepts]: Start accepts. Automaton has 12633 states and 18294 transitions. Word has length 505 [2022-11-03 02:32:15,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:32:15,647 INFO L495 AbstractCegarLoop]: Abstraction has 12633 states and 18294 transitions. [2022-11-03 02:32:15,647 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) [2022-11-03 02:32:15,647 INFO L276 IsEmpty]: Start isEmpty. Operand 12633 states and 18294 transitions. [2022-11-03 02:32:15,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2022-11-03 02:32:15,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:32:15,663 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] [2022-11-03 02:32:15,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:15,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 02:32:15,864 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:32:15,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:32:15,865 INFO L85 PathProgramCache]: Analyzing trace with hash 87789389, now seen corresponding path program 1 times [2022-11-03 02:32:15,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:32:15,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708073797] [2022-11-03 02:32:15,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:15,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:32:16,232 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:32:16,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812762202] [2022-11-03 02:32:16,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:16,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:32:16,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:32:16,234 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:32:16,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:32:19,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:19,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 5892 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:32:19,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:20,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4392 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4392 trivial. 0 not checked. [2022-11-03 02:32:20,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:32:20,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:32:20,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708073797] [2022-11-03 02:32:20,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:32:20,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812762202] [2022-11-03 02:32:20,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812762202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:32:20,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:32:20,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:32:20,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765627583] [2022-11-03 02:32:20,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:32:20,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:32:20,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:32:20,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:32:20,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:32:20,803 INFO L87 Difference]: Start difference. First operand 12633 states and 18294 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) [2022-11-03 02:32:22,825 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 [] [2022-11-03 02:32:25,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:32:27,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:32:29,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:32:33,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:32:34,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:32:34,530 INFO L93 Difference]: Finished difference Result 12641 states and 18301 transitions. [2022-11-03 02:32:34,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:32:34,531 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 [2022-11-03 02:32:34,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:32:34,584 INFO L225 Difference]: With dead ends: 12641 [2022-11-03 02:32:34,584 INFO L226 Difference]: Without dead ends: 12573 [2022-11-03 02:32:34,591 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 [2022-11-03 02:32:34,592 INFO L413 NwaCegarLoop]: 2036 mSDtfsCounter, 1882 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1887 SdHoareTripleChecker+Valid, 2376 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:32:34,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1887 Valid, 2376 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 289 Invalid, 5 Unknown, 0 Unchecked, 13.1s Time] [2022-11-03 02:32:34,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12573 states. [2022-11-03 02:32:35,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12573 to 12567. [2022-11-03 02:32:35,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12567 states, 8660 states have (on average 1.42459584295612) internal successors, (12337), 9051 states have internal predecessors, (12337), 2924 states have call successors, (2924), 1004 states have call predecessors, (2924), 982 states have return successors, (2938), 2786 states have call predecessors, (2938), 2922 states have call successors, (2938) [2022-11-03 02:32:35,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12567 states to 12567 states and 18199 transitions. [2022-11-03 02:32:35,331 INFO L78 Accepts]: Start accepts. Automaton has 12567 states and 18199 transitions. Word has length 506 [2022-11-03 02:32:35,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:32:35,332 INFO L495 AbstractCegarLoop]: Abstraction has 12567 states and 18199 transitions. [2022-11-03 02:32:35,332 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) [2022-11-03 02:32:35,332 INFO L276 IsEmpty]: Start isEmpty. Operand 12567 states and 18199 transitions. [2022-11-03 02:32:35,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2022-11-03 02:32:35,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:32:35,348 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] [2022-11-03 02:32:35,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:35,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 02:32:35,550 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:32:35,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:32:35,550 INFO L85 PathProgramCache]: Analyzing trace with hash 929029384, now seen corresponding path program 1 times [2022-11-03 02:32:35,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:32:35,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68824918] [2022-11-03 02:32:35,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:35,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:32:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:36,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4382 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4379 trivial. 0 not checked. [2022-11-03 02:32:36,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:32:36,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68824918] [2022-11-03 02:32:36,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68824918] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:32:36,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178728085] [2022-11-03 02:32:36,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:36,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:32:36,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:32:36,394 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:32:36,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8edfd281-af80-40c6-9b25-72d021aacf9e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:32:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:39,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 5388 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:32:39,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4382 backedges. 162 proven. 1 refuted. 0 times theorem prover too weak. 4219 trivial. 0 not checked. [2022-11-03 02:32:39,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:40,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4382 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4379 trivial. 0 not checked. [2022-11-03 02:32:40,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178728085] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:40,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1138294146] [2022-11-03 02:32:40,233 INFO L159 IcfgInterpreter]: Started Sifa with 185 locations of interest [2022-11-03 02:32:40,234 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:32:40,238 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:32:40,244 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:32:40,244 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:32:44,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:44,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:45,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:45,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:45,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:45,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:45,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:46,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:46,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:46,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:46,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:46,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:46,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:46,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:46,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:47,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:47,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:47,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:47,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:47,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:47,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:47,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:47,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:47,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:47,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:47,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:47,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:47,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:48,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:48,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:48,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:48,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:48,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:48,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:48,185 INFO L244 Elim1Store]: Index analysis took 3670 ms