./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pt.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pt.ko-main.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 3b154baf348652a9aadd484f41053a90df6581eb3d7346fd488d4cc05040e74b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 03:48:03,146 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 03:48:03,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 03:48:03,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 03:48:03,173 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 03:48:03,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 03:48:03,181 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 03:48:03,182 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 03:48:03,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 03:48:03,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 03:48:03,184 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 03:48:03,188 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 03:48:03,188 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 03:48:03,191 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 03:48:03,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 03:48:03,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 03:48:03,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 03:48:03,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 03:48:03,196 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 03:48:03,199 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 03:48:03,201 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 03:48:03,202 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 03:48:03,203 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 03:48:03,203 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 03:48:03,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 03:48:03,207 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 03:48:03,208 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 03:48:03,208 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 03:48:03,209 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 03:48:03,215 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 03:48:03,215 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 03:48:03,215 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 03:48:03,216 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 03:48:03,217 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 03:48:03,217 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 03:48:03,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 03:48:03,218 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 03:48:03,219 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 03:48:03,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 03:48:03,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 03:48:03,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 03:48:03,221 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-28 03:48:03,241 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 03:48:03,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 03:48:03,242 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 03:48:03,243 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 03:48:03,243 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 03:48:03,243 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 03:48:03,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 03:48:03,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 03:48:03,245 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 03:48:03,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 03:48:03,245 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 03:48:03,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 03:48:03,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 03:48:03,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 03:48:03,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 03:48:03,246 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 03:48:03,246 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 03:48:03,246 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 03:48:03,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 03:48:03,247 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 03:48:03,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 03:48:03,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:48:03,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 03:48:03,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 03:48:03,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 03:48:03,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 03:48:03,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 03:48:03,248 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 03:48:03,248 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 03:48:03,248 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 03:48:03,248 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3b154baf348652a9aadd484f41053a90df6581eb3d7346fd488d4cc05040e74b [2021-12-28 03:48:03,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 03:48:03,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 03:48:03,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 03:48:03,483 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 03:48:03,484 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 03:48:03,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pt.ko-main.cil.out.i [2021-12-28 03:48:03,526 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ac945ac8/e840332c95bf4aa4b505568a75e314d2/FLAG50f7aa06a [2021-12-28 03:48:04,088 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 03:48:04,089 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pt.ko-main.cil.out.i [2021-12-28 03:48:04,120 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ac945ac8/e840332c95bf4aa4b505568a75e314d2/FLAG50f7aa06a [2021-12-28 03:48:04,332 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ac945ac8/e840332c95bf4aa4b505568a75e314d2 [2021-12-28 03:48:04,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 03:48:04,335 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 03:48:04,336 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 03:48:04,337 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 03:48:04,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 03:48:04,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:48:04" (1/1) ... [2021-12-28 03:48:04,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@724c4494 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:48:04, skipping insertion in model container [2021-12-28 03:48:04,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:48:04" (1/1) ... [2021-12-28 03:48:04,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 03:48:04,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 03:48:05,005 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pt.ko-main.cil.out.i[119285,119298] [2021-12-28 03:48:05,074 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:48:05,102 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 03:48:05,249 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pt.ko-main.cil.out.i[119285,119298] [2021-12-28 03:48:05,256 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:48:05,289 INFO L208 MainTranslator]: Completed translation [2021-12-28 03:48:05,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:48:05 WrapperNode [2021-12-28 03:48:05,290 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 03:48:05,291 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 03:48:05,291 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 03:48:05,291 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 03:48:05,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:48:05" (1/1) ... [2021-12-28 03:48:05,350 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:48:05" (1/1) ... [2021-12-28 03:48:05,418 INFO L137 Inliner]: procedures = 144, calls = 800, calls flagged for inlining = 49, calls inlined = 41, statements flattened = 1426 [2021-12-28 03:48:05,419 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 03:48:05,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 03:48:05,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 03:48:05,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 03:48:05,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:48:05" (1/1) ... [2021-12-28 03:48:05,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:48:05" (1/1) ... [2021-12-28 03:48:05,446 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:48:05" (1/1) ... [2021-12-28 03:48:05,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:48:05" (1/1) ... [2021-12-28 03:48:05,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:48:05" (1/1) ... [2021-12-28 03:48:05,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:48:05" (1/1) ... [2021-12-28 03:48:05,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:48:05" (1/1) ... [2021-12-28 03:48:05,543 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 03:48:05,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 03:48:05,545 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 03:48:05,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 03:48:05,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:48:05" (1/1) ... [2021-12-28 03:48:05,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:48:05,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:48:05,580 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 03:48:05,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 03:48:05,635 INFO L130 BoogieDeclarations]: Found specification of procedure pi_release [2021-12-28 03:48:05,637 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_release [2021-12-28 03:48:05,637 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2021-12-28 03:48:05,637 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2021-12-28 03:48:05,637 INFO L130 BoogieDeclarations]: Found specification of procedure pi_disconnect [2021-12-28 03:48:05,638 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_disconnect [2021-12-28 03:48:05,638 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_pt_mutex [2021-12-28 03:48:05,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_pt_mutex [2021-12-28 03:48:05,638 INFO L130 BoogieDeclarations]: Found specification of procedure status_reg [2021-12-28 03:48:05,638 INFO L138 BoogieDeclarations]: Found implementation of procedure status_reg [2021-12-28 03:48:05,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 03:48:05,638 INFO L130 BoogieDeclarations]: Found specification of procedure pi_read_block [2021-12-28 03:48:05,638 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_read_block [2021-12-28 03:48:05,639 INFO L130 BoogieDeclarations]: Found specification of procedure read_reg [2021-12-28 03:48:05,639 INFO L138 BoogieDeclarations]: Found implementation of procedure read_reg [2021-12-28 03:48:05,639 INFO L130 BoogieDeclarations]: Found specification of procedure pt_media_access_cmd [2021-12-28 03:48:05,639 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_media_access_cmd [2021-12-28 03:48:05,639 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-28 03:48:05,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-28 03:48:05,640 INFO L130 BoogieDeclarations]: Found specification of procedure pt_reset [2021-12-28 03:48:05,640 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_reset [2021-12-28 03:48:05,640 INFO L130 BoogieDeclarations]: Found specification of procedure pt_identify [2021-12-28 03:48:05,640 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_identify [2021-12-28 03:48:05,640 INFO L130 BoogieDeclarations]: Found specification of procedure pt_command [2021-12-28 03:48:05,640 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_command [2021-12-28 03:48:05,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 03:48:05,640 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-12-28 03:48:05,641 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-12-28 03:48:05,641 INFO L130 BoogieDeclarations]: Found specification of procedure pt_write [2021-12-28 03:48:05,641 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_write [2021-12-28 03:48:05,641 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-28 03:48:05,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-28 03:48:05,641 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-28 03:48:05,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-28 03:48:05,641 INFO L130 BoogieDeclarations]: Found specification of procedure pt_atapi [2021-12-28 03:48:05,642 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_atapi [2021-12-28 03:48:05,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 03:48:05,642 INFO L130 BoogieDeclarations]: Found specification of procedure pt_poll_dsc [2021-12-28 03:48:05,642 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_poll_dsc [2021-12-28 03:48:05,642 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_pt_mutex [2021-12-28 03:48:05,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_pt_mutex [2021-12-28 03:48:05,643 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-12-28 03:48:05,643 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-12-28 03:48:05,643 INFO L130 BoogieDeclarations]: Found specification of procedure pt_req_sense [2021-12-28 03:48:05,643 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_req_sense [2021-12-28 03:48:05,643 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-12-28 03:48:05,643 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-12-28 03:48:05,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 03:48:05,644 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_17 [2021-12-28 03:48:05,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_17 [2021-12-28 03:48:05,644 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2021-12-28 03:48:05,644 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2021-12-28 03:48:05,644 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-12-28 03:48:05,644 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-12-28 03:48:05,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-28 03:48:05,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 03:48:05,645 INFO L130 BoogieDeclarations]: Found specification of procedure DRIVE [2021-12-28 03:48:05,645 INFO L138 BoogieDeclarations]: Found implementation of procedure DRIVE [2021-12-28 03:48:05,646 INFO L130 BoogieDeclarations]: Found specification of procedure pt_completion [2021-12-28 03:48:05,646 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_completion [2021-12-28 03:48:05,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-28 03:48:05,647 INFO L130 BoogieDeclarations]: Found specification of procedure pt_sleep [2021-12-28 03:48:05,647 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_sleep [2021-12-28 03:48:05,647 INFO L130 BoogieDeclarations]: Found specification of procedure pt_write_fm [2021-12-28 03:48:05,647 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_write_fm [2021-12-28 03:48:05,647 INFO L130 BoogieDeclarations]: Found specification of procedure iminor [2021-12-28 03:48:05,647 INFO L138 BoogieDeclarations]: Found implementation of procedure iminor [2021-12-28 03:48:05,647 INFO L130 BoogieDeclarations]: Found specification of procedure pi_write_block [2021-12-28 03:48:05,648 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_write_block [2021-12-28 03:48:05,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 03:48:05,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-28 03:48:05,648 INFO L130 BoogieDeclarations]: Found specification of procedure pi_init [2021-12-28 03:48:05,648 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_init [2021-12-28 03:48:05,648 INFO L130 BoogieDeclarations]: Found specification of procedure pi_read_regr [2021-12-28 03:48:05,649 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_read_regr [2021-12-28 03:48:05,649 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-12-28 03:48:05,649 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-12-28 03:48:05,649 INFO L130 BoogieDeclarations]: Found specification of procedure pt_wait [2021-12-28 03:48:05,649 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_wait [2021-12-28 03:48:05,649 INFO L130 BoogieDeclarations]: Found specification of procedure pi_connect [2021-12-28 03:48:05,649 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_connect [2021-12-28 03:48:05,649 INFO L130 BoogieDeclarations]: Found specification of procedure device_destroy [2021-12-28 03:48:05,650 INFO L138 BoogieDeclarations]: Found implementation of procedure device_destroy [2021-12-28 03:48:05,650 INFO L130 BoogieDeclarations]: Found specification of procedure pt_probe [2021-12-28 03:48:05,650 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_probe [2021-12-28 03:48:05,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 03:48:05,650 INFO L130 BoogieDeclarations]: Found specification of procedure pt_rewind [2021-12-28 03:48:05,650 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_rewind [2021-12-28 03:48:05,650 INFO L130 BoogieDeclarations]: Found specification of procedure xn [2021-12-28 03:48:05,650 INFO L138 BoogieDeclarations]: Found implementation of procedure xn [2021-12-28 03:48:05,651 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-12-28 03:48:05,651 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-12-28 03:48:05,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 03:48:05,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 03:48:05,651 INFO L130 BoogieDeclarations]: Found specification of procedure xs [2021-12-28 03:48:05,652 INFO L138 BoogieDeclarations]: Found implementation of procedure xs [2021-12-28 03:48:06,018 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 03:48:06,019 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 03:48:11,461 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 03:48:11,470 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 03:48:11,470 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-28 03:48:11,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:48:11 BoogieIcfgContainer [2021-12-28 03:48:11,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 03:48:11,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 03:48:11,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 03:48:11,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 03:48:11,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 03:48:04" (1/3) ... [2021-12-28 03:48:11,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aa5055b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:48:11, skipping insertion in model container [2021-12-28 03:48:11,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:48:05" (2/3) ... [2021-12-28 03:48:11,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aa5055b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:48:11, skipping insertion in model container [2021-12-28 03:48:11,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:48:11" (3/3) ... [2021-12-28 03:48:11,478 INFO L111 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pt.ko-main.cil.out.i [2021-12-28 03:48:11,481 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 03:48:11,481 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 03:48:11,514 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 03:48:11,518 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 03:48:11,518 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 03:48:11,549 INFO L276 IsEmpty]: Start isEmpty. Operand has 674 states, 467 states have (on average 1.3533190578158458) internal successors, (632), 489 states have internal predecessors, (632), 167 states have call successors, (167), 42 states have call predecessors, (167), 42 states have return successors, (167), 167 states have call predecessors, (167), 167 states have call successors, (167) [2021-12-28 03:48:11,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-28 03:48:11,555 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:11,555 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:48:11,556 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:11,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:11,560 INFO L85 PathProgramCache]: Analyzing trace with hash 334168328, now seen corresponding path program 1 times [2021-12-28 03:48:11,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:11,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735119421] [2021-12-28 03:48:11,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:11,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:11,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:11,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-28 03:48:11,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:48:11,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:11,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735119421] [2021-12-28 03:48:11,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735119421] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:11,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:48:11,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 03:48:11,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816449712] [2021-12-28 03:48:11,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:11,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:48:11,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:11,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:48:11,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:48:11,977 INFO L87 Difference]: Start difference. First operand has 674 states, 467 states have (on average 1.3533190578158458) internal successors, (632), 489 states have internal predecessors, (632), 167 states have call successors, (167), 42 states have call predecessors, (167), 42 states have return successors, (167), 167 states have call predecessors, (167), 167 states have call successors, (167) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 03:48:12,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:12,381 INFO L93 Difference]: Finished difference Result 1645 states and 2392 transitions. [2021-12-28 03:48:12,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:48:12,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-12-28 03:48:12,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:12,411 INFO L225 Difference]: With dead ends: 1645 [2021-12-28 03:48:12,411 INFO L226 Difference]: Without dead ends: 966 [2021-12-28 03:48:12,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:48:12,422 INFO L933 BasicCegarLoop]: 1197 mSDtfsCounter, 439 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 2091 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 03:48:12,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 2091 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 03:48:12,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-12-28 03:48:12,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 938. [2021-12-28 03:48:12,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 645 states have (on average 1.3472868217054264) internal successors, (869), 667 states have internal predecessors, (869), 228 states have call successors, (228), 65 states have call predecessors, (228), 64 states have return successors, (222), 222 states have call predecessors, (222), 222 states have call successors, (222) [2021-12-28 03:48:12,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1319 transitions. [2021-12-28 03:48:12,545 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1319 transitions. Word has length 19 [2021-12-28 03:48:12,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:12,545 INFO L470 AbstractCegarLoop]: Abstraction has 938 states and 1319 transitions. [2021-12-28 03:48:12,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 03:48:12,547 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1319 transitions. [2021-12-28 03:48:12,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-28 03:48:12,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:12,550 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:48:12,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 03:48:12,551 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:12,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:12,553 INFO L85 PathProgramCache]: Analyzing trace with hash -720822466, now seen corresponding path program 1 times [2021-12-28 03:48:12,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:12,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358394168] [2021-12-28 03:48:12,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:12,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:12,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:12,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:48:12,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:12,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358394168] [2021-12-28 03:48:12,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358394168] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:12,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:48:12,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 03:48:12,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457548454] [2021-12-28 03:48:12,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:12,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:48:12,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:12,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:48:12,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:48:12,669 INFO L87 Difference]: Start difference. First operand 938 states and 1319 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:48:12,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:12,725 INFO L93 Difference]: Finished difference Result 1873 states and 2635 transitions. [2021-12-28 03:48:12,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:48:12,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-28 03:48:12,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:12,732 INFO L225 Difference]: With dead ends: 1873 [2021-12-28 03:48:12,732 INFO L226 Difference]: Without dead ends: 938 [2021-12-28 03:48:12,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:48:12,736 INFO L933 BasicCegarLoop]: 927 mSDtfsCounter, 918 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:48:12,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 927 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:48:12,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-12-28 03:48:12,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 938. [2021-12-28 03:48:12,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 645 states have (on average 1.344186046511628) internal successors, (867), 667 states have internal predecessors, (867), 228 states have call successors, (228), 65 states have call predecessors, (228), 64 states have return successors, (222), 222 states have call predecessors, (222), 222 states have call successors, (222) [2021-12-28 03:48:12,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1317 transitions. [2021-12-28 03:48:12,810 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1317 transitions. Word has length 19 [2021-12-28 03:48:12,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:12,810 INFO L470 AbstractCegarLoop]: Abstraction has 938 states and 1317 transitions. [2021-12-28 03:48:12,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:48:12,812 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1317 transitions. [2021-12-28 03:48:12,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-28 03:48:12,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:12,816 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:48:12,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 03:48:12,816 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:12,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:12,818 INFO L85 PathProgramCache]: Analyzing trace with hash 569153980, now seen corresponding path program 1 times [2021-12-28 03:48:12,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:12,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103544208] [2021-12-28 03:48:12,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:12,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:12,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 03:48:12,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:48:12,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:12,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103544208] [2021-12-28 03:48:12,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103544208] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:12,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:48:12,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:48:12,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596546841] [2021-12-28 03:48:12,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:12,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:48:12,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:12,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:48:12,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:48:12,898 INFO L87 Difference]: Start difference. First operand 938 states and 1317 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 03:48:16,400 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:48:18,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:18,238 INFO L93 Difference]: Finished difference Result 2411 states and 3394 transitions. [2021-12-28 03:48:18,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:48:18,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-12-28 03:48:18,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:18,245 INFO L225 Difference]: With dead ends: 2411 [2021-12-28 03:48:18,245 INFO L226 Difference]: Without dead ends: 1476 [2021-12-28 03:48:18,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:48:18,251 INFO L933 BasicCegarLoop]: 1429 mSDtfsCounter, 991 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 467 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1129 SdHoareTripleChecker+Valid, 2066 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 467 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:48:18,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1129 Valid, 2066 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 858 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2021-12-28 03:48:18,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2021-12-28 03:48:18,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 1472. [2021-12-28 03:48:18,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1013 states have (on average 1.3455083909180652) internal successors, (1363), 1043 states have internal predecessors, (1363), 357 states have call successors, (357), 102 states have call predecessors, (357), 101 states have return successors, (351), 351 states have call predecessors, (351), 351 states have call successors, (351) [2021-12-28 03:48:18,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2071 transitions. [2021-12-28 03:48:18,306 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2071 transitions. Word has length 25 [2021-12-28 03:48:18,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:18,307 INFO L470 AbstractCegarLoop]: Abstraction has 1472 states and 2071 transitions. [2021-12-28 03:48:18,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 03:48:18,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2071 transitions. [2021-12-28 03:48:18,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-28 03:48:18,310 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:18,310 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:48:18,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 03:48:18,316 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:18,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:18,316 INFO L85 PathProgramCache]: Analyzing trace with hash 491627987, now seen corresponding path program 1 times [2021-12-28 03:48:18,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:18,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136981489] [2021-12-28 03:48:18,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:18,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:18,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:18,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:48:18,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:18,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136981489] [2021-12-28 03:48:18,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136981489] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:18,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:48:18,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 03:48:18,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62125193] [2021-12-28 03:48:18,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:18,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:48:18,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:18,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:48:18,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:48:18,380 INFO L87 Difference]: Start difference. First operand 1472 states and 2071 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:48:18,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:18,494 INFO L93 Difference]: Finished difference Result 2967 states and 4179 transitions. [2021-12-28 03:48:18,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:48:18,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-28 03:48:18,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:18,502 INFO L225 Difference]: With dead ends: 2967 [2021-12-28 03:48:18,503 INFO L226 Difference]: Without dead ends: 1498 [2021-12-28 03:48:18,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:48:18,508 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 12 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1847 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:48:18,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 1847 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:48:18,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2021-12-28 03:48:18,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1474. [2021-12-28 03:48:18,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1015 states have (on average 1.3448275862068966) internal successors, (1365), 1045 states have internal predecessors, (1365), 357 states have call successors, (357), 102 states have call predecessors, (357), 101 states have return successors, (351), 351 states have call predecessors, (351), 351 states have call successors, (351) [2021-12-28 03:48:18,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 2073 transitions. [2021-12-28 03:48:18,553 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 2073 transitions. Word has length 24 [2021-12-28 03:48:18,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:18,553 INFO L470 AbstractCegarLoop]: Abstraction has 1474 states and 2073 transitions. [2021-12-28 03:48:18,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:48:18,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 2073 transitions. [2021-12-28 03:48:18,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-28 03:48:18,560 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:18,560 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:48:18,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 03:48:18,561 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:18,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:18,561 INFO L85 PathProgramCache]: Analyzing trace with hash 402915506, now seen corresponding path program 1 times [2021-12-28 03:48:18,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:18,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880863046] [2021-12-28 03:48:18,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:18,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:48:18,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:18,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880863046] [2021-12-28 03:48:18,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880863046] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:18,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:48:18,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 03:48:18,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552672264] [2021-12-28 03:48:18,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:18,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:48:18,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:18,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:48:18,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:48:18,632 INFO L87 Difference]: Start difference. First operand 1474 states and 2073 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:48:18,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:18,692 INFO L93 Difference]: Finished difference Result 3380 states and 4835 transitions. [2021-12-28 03:48:18,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:48:18,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-28 03:48:18,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:18,701 INFO L225 Difference]: With dead ends: 3380 [2021-12-28 03:48:18,701 INFO L226 Difference]: Without dead ends: 1909 [2021-12-28 03:48:18,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 03:48:18,707 INFO L933 BasicCegarLoop]: 1277 mSDtfsCounter, 246 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 2249 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:48:18,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 2249 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:48:18,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2021-12-28 03:48:18,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1486. [2021-12-28 03:48:18,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1027 states have (on average 1.3446932814021422) internal successors, (1381), 1057 states have internal predecessors, (1381), 357 states have call successors, (357), 102 states have call predecessors, (357), 101 states have return successors, (351), 351 states have call predecessors, (351), 351 states have call successors, (351) [2021-12-28 03:48:18,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 2089 transitions. [2021-12-28 03:48:18,782 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 2089 transitions. Word has length 29 [2021-12-28 03:48:18,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:18,783 INFO L470 AbstractCegarLoop]: Abstraction has 1486 states and 2089 transitions. [2021-12-28 03:48:18,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:48:18,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 2089 transitions. [2021-12-28 03:48:18,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-28 03:48:18,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:18,784 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:48:18,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 03:48:18,784 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:18,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:18,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1038619191, now seen corresponding path program 1 times [2021-12-28 03:48:18,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:18,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953193489] [2021-12-28 03:48:18,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:18,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:18,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 03:48:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:18,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:48:18,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:18,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953193489] [2021-12-28 03:48:18,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953193489] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:48:18,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262115999] [2021-12-28 03:48:18,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:18,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:18,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:48:18,892 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:48:18,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 03:48:19,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:19,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:48:19,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:48:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:48:19,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:48:19,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262115999] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:19,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:48:19,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-28 03:48:19,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168123819] [2021-12-28 03:48:19,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:19,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:48:19,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:19,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:48:19,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:48:19,296 INFO L87 Difference]: Start difference. First operand 1486 states and 2089 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 03:48:19,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:19,380 INFO L93 Difference]: Finished difference Result 3436 states and 4919 transitions. [2021-12-28 03:48:19,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:48:19,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-12-28 03:48:19,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:19,391 INFO L225 Difference]: With dead ends: 3436 [2021-12-28 03:48:19,392 INFO L226 Difference]: Without dead ends: 1953 [2021-12-28 03:48:19,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:48:19,399 INFO L933 BasicCegarLoop]: 1013 mSDtfsCounter, 249 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 1937 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:48:19,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 1937 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:48:19,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-12-28 03:48:19,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1532. [2021-12-28 03:48:19,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1061 states have (on average 1.3468426013195098) internal successors, (1429), 1091 states have internal predecessors, (1429), 369 states have call successors, (369), 102 states have call predecessors, (369), 101 states have return successors, (363), 363 states have call predecessors, (363), 363 states have call successors, (363) [2021-12-28 03:48:19,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 2161 transitions. [2021-12-28 03:48:19,456 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 2161 transitions. Word has length 35 [2021-12-28 03:48:19,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:19,456 INFO L470 AbstractCegarLoop]: Abstraction has 1532 states and 2161 transitions. [2021-12-28 03:48:19,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 03:48:19,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 2161 transitions. [2021-12-28 03:48:19,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-28 03:48:19,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:19,459 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:48:19,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 03:48:19,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-28 03:48:19,680 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:19,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:19,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1739683769, now seen corresponding path program 1 times [2021-12-28 03:48:19,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:19,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196877112] [2021-12-28 03:48:19,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:19,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:19,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 03:48:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:48:19,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:19,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196877112] [2021-12-28 03:48:19,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196877112] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:48:19,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000108439] [2021-12-28 03:48:19,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:19,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:19,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:48:19,780 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:48:19,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 03:48:20,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:20,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:48:20,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:48:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:48:20,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:48:20,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000108439] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:20,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:48:20,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-28 03:48:20,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114973276] [2021-12-28 03:48:20,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:20,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:48:20,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:20,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:48:20,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:48:20,120 INFO L87 Difference]: Start difference. First operand 1532 states and 2161 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 03:48:20,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:20,171 INFO L93 Difference]: Finished difference Result 1554 states and 2187 transitions. [2021-12-28 03:48:20,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:48:20,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-12-28 03:48:20,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:20,178 INFO L225 Difference]: With dead ends: 1554 [2021-12-28 03:48:20,178 INFO L226 Difference]: Without dead ends: 1543 [2021-12-28 03:48:20,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:48:20,180 INFO L933 BasicCegarLoop]: 940 mSDtfsCounter, 923 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:48:20,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [923 Valid, 953 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:48:20,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-12-28 03:48:20,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1532. [2021-12-28 03:48:20,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1061 states have (on average 1.344957587181904) internal successors, (1427), 1091 states have internal predecessors, (1427), 369 states have call successors, (369), 102 states have call predecessors, (369), 101 states have return successors, (363), 363 states have call predecessors, (363), 363 states have call successors, (363) [2021-12-28 03:48:20,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 2159 transitions. [2021-12-28 03:48:20,236 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 2159 transitions. Word has length 35 [2021-12-28 03:48:20,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:20,236 INFO L470 AbstractCegarLoop]: Abstraction has 1532 states and 2159 transitions. [2021-12-28 03:48:20,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 03:48:20,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 2159 transitions. [2021-12-28 03:48:20,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-28 03:48:20,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:20,237 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:48:20,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 03:48:20,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-28 03:48:20,447 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:20,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:20,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1796942071, now seen corresponding path program 1 times [2021-12-28 03:48:20,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:20,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048199538] [2021-12-28 03:48:20,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:20,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:20,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:20,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 03:48:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:20,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:48:20,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:20,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048199538] [2021-12-28 03:48:20,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048199538] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:48:20,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300082087] [2021-12-28 03:48:20,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:20,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:20,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:48:20,512 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:48:20,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 03:48:20,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:20,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 1060 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:48:20,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:48:20,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:48:20,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:48:20,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300082087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:20,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:48:20,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-28 03:48:20,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343968017] [2021-12-28 03:48:20,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:20,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:48:20,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:20,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:48:20,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:48:20,936 INFO L87 Difference]: Start difference. First operand 1532 states and 2159 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 03:48:20,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:20,990 INFO L93 Difference]: Finished difference Result 1534 states and 2160 transitions. [2021-12-28 03:48:20,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:48:20,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-12-28 03:48:20,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:20,998 INFO L225 Difference]: With dead ends: 1534 [2021-12-28 03:48:20,999 INFO L226 Difference]: Without dead ends: 1531 [2021-12-28 03:48:21,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:48:21,000 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 894 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:48:21,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [894 Valid, 925 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:48:21,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2021-12-28 03:48:21,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 1531. [2021-12-28 03:48:21,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1061 states have (on average 1.3440150801131008) internal successors, (1426), 1090 states have internal predecessors, (1426), 368 states have call successors, (368), 102 states have call predecessors, (368), 101 states have return successors, (363), 363 states have call predecessors, (363), 363 states have call successors, (363) [2021-12-28 03:48:21,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 2157 transitions. [2021-12-28 03:48:21,044 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 2157 transitions. Word has length 35 [2021-12-28 03:48:21,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:21,045 INFO L470 AbstractCegarLoop]: Abstraction has 1531 states and 2157 transitions. [2021-12-28 03:48:21,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 03:48:21,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 2157 transitions. [2021-12-28 03:48:21,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-28 03:48:21,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:21,046 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:48:21,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 03:48:21,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:21,268 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:21,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:21,268 INFO L85 PathProgramCache]: Analyzing trace with hash -129755051, now seen corresponding path program 1 times [2021-12-28 03:48:21,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:21,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805130585] [2021-12-28 03:48:21,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:21,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:21,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 03:48:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:21,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:48:21,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:21,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805130585] [2021-12-28 03:48:21,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805130585] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:48:21,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936301978] [2021-12-28 03:48:21,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:21,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:21,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:48:21,342 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:48:21,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 03:48:21,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:21,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:48:21,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:48:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:48:21,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:48:21,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936301978] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:21,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:48:21,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-28 03:48:21,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858106392] [2021-12-28 03:48:21,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:21,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:48:21,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:21,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:48:21,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:48:21,751 INFO L87 Difference]: Start difference. First operand 1531 states and 2157 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 03:48:21,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:21,795 INFO L93 Difference]: Finished difference Result 1533 states and 2158 transitions. [2021-12-28 03:48:21,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:48:21,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-12-28 03:48:21,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:21,803 INFO L225 Difference]: With dead ends: 1533 [2021-12-28 03:48:21,803 INFO L226 Difference]: Without dead ends: 1530 [2021-12-28 03:48:21,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:48:21,805 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 891 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:48:21,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [891 Valid, 923 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:48:21,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2021-12-28 03:48:21,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1530. [2021-12-28 03:48:21,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1530 states, 1061 states have (on average 1.3430725730442978) internal successors, (1425), 1089 states have internal predecessors, (1425), 367 states have call successors, (367), 102 states have call predecessors, (367), 101 states have return successors, (363), 363 states have call predecessors, (363), 363 states have call successors, (363) [2021-12-28 03:48:21,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1530 states to 1530 states and 2155 transitions. [2021-12-28 03:48:21,851 INFO L78 Accepts]: Start accepts. Automaton has 1530 states and 2155 transitions. Word has length 36 [2021-12-28 03:48:21,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:21,851 INFO L470 AbstractCegarLoop]: Abstraction has 1530 states and 2155 transitions. [2021-12-28 03:48:21,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 03:48:21,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1530 states and 2155 transitions. [2021-12-28 03:48:21,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-28 03:48:21,852 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:21,852 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:48:21,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 03:48:22,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:22,086 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:22,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:22,087 INFO L85 PathProgramCache]: Analyzing trace with hash 272181178, now seen corresponding path program 1 times [2021-12-28 03:48:22,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:22,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766281078] [2021-12-28 03:48:22,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:22,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:22,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 03:48:22,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:22,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:48:22,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:22,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766281078] [2021-12-28 03:48:22,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766281078] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:48:22,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482032802] [2021-12-28 03:48:22,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:22,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:22,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:48:22,191 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:48:22,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 03:48:22,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:22,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 1064 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:48:22,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:48:22,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:48:22,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:48:22,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482032802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:22,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:48:22,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-28 03:48:22,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615477584] [2021-12-28 03:48:22,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:22,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:48:22,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:22,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:48:22,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:48:22,565 INFO L87 Difference]: Start difference. First operand 1530 states and 2155 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 03:48:22,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:22,606 INFO L93 Difference]: Finished difference Result 1532 states and 2156 transitions. [2021-12-28 03:48:22,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:48:22,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-12-28 03:48:22,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:22,614 INFO L225 Difference]: With dead ends: 1532 [2021-12-28 03:48:22,614 INFO L226 Difference]: Without dead ends: 1529 [2021-12-28 03:48:22,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:48:22,616 INFO L933 BasicCegarLoop]: 921 mSDtfsCounter, 888 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:48:22,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 921 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:48:22,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2021-12-28 03:48:22,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1529. [2021-12-28 03:48:22,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1061 states have (on average 1.342130065975495) internal successors, (1424), 1088 states have internal predecessors, (1424), 366 states have call successors, (366), 102 states have call predecessors, (366), 101 states have return successors, (363), 363 states have call predecessors, (363), 363 states have call successors, (363) [2021-12-28 03:48:22,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 2153 transitions. [2021-12-28 03:48:22,683 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 2153 transitions. Word has length 37 [2021-12-28 03:48:22,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:22,683 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 2153 transitions. [2021-12-28 03:48:22,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 03:48:22,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 2153 transitions. [2021-12-28 03:48:22,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-28 03:48:22,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:22,684 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:48:22,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 03:48:22,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-28 03:48:22,891 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:22,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:22,892 INFO L85 PathProgramCache]: Analyzing trace with hash -152692744, now seen corresponding path program 1 times [2021-12-28 03:48:22,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:22,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941016659] [2021-12-28 03:48:22,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:22,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:22,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:22,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 03:48:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:48:22,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:22,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941016659] [2021-12-28 03:48:22,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941016659] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:48:22,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619474523] [2021-12-28 03:48:22,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:22,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:22,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:48:22,954 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:48:22,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 03:48:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:23,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 1066 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:48:23,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:48:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:48:23,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:48:23,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619474523] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:23,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:48:23,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-28 03:48:23,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287902683] [2021-12-28 03:48:23,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:23,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:48:23,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:23,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:48:23,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:48:23,351 INFO L87 Difference]: Start difference. First operand 1529 states and 2153 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 03:48:23,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:23,434 INFO L93 Difference]: Finished difference Result 1953 states and 2700 transitions. [2021-12-28 03:48:23,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:48:23,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-12-28 03:48:23,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:23,442 INFO L225 Difference]: With dead ends: 1953 [2021-12-28 03:48:23,443 INFO L226 Difference]: Without dead ends: 1916 [2021-12-28 03:48:23,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:48:23,444 INFO L933 BasicCegarLoop]: 1046 mSDtfsCounter, 818 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:48:23,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [818 Valid, 1423 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:48:23,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2021-12-28 03:48:23,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1916. [2021-12-28 03:48:23,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1300 states have (on average 1.32) internal successors, (1716), 1335 states have internal predecessors, (1716), 469 states have call successors, (469), 147 states have call predecessors, (469), 146 states have return successors, (468), 468 states have call predecessors, (468), 468 states have call successors, (468) [2021-12-28 03:48:23,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2653 transitions. [2021-12-28 03:48:23,515 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2653 transitions. Word has length 38 [2021-12-28 03:48:23,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:23,516 INFO L470 AbstractCegarLoop]: Abstraction has 1916 states and 2653 transitions. [2021-12-28 03:48:23,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 03:48:23,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2653 transitions. [2021-12-28 03:48:23,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 03:48:23,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:23,518 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 03:48:23,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 03:48:23,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:23,743 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:23,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:23,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1937560449, now seen corresponding path program 1 times [2021-12-28 03:48:23,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:23,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058825740] [2021-12-28 03:48:23,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:23,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:23,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 03:48:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:23,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 03:48:23,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:23,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 03:48:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:23,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 03:48:23,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:48:23,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:23,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058825740] [2021-12-28 03:48:23,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058825740] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:48:23,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129963196] [2021-12-28 03:48:23,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:23,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:23,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:48:23,847 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:48:23,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 03:48:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:24,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 03:48:24,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:48:24,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:48:24,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:48:24,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129963196] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:24,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:48:24,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-28 03:48:24,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094871836] [2021-12-28 03:48:24,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:24,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:48:24,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:24,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:48:24,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:48:24,252 INFO L87 Difference]: Start difference. First operand 1916 states and 2653 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-28 03:48:24,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:24,344 INFO L93 Difference]: Finished difference Result 3839 states and 5318 transitions. [2021-12-28 03:48:24,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:48:24,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2021-12-28 03:48:24,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:24,353 INFO L225 Difference]: With dead ends: 3839 [2021-12-28 03:48:24,353 INFO L226 Difference]: Without dead ends: 1926 [2021-12-28 03:48:24,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:48:24,361 INFO L933 BasicCegarLoop]: 879 mSDtfsCounter, 9 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1752 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:48:24,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1752 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:48:24,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-12-28 03:48:24,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1918. [2021-12-28 03:48:24,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1302 states have (on average 1.3195084485407067) internal successors, (1718), 1337 states have internal predecessors, (1718), 469 states have call successors, (469), 147 states have call predecessors, (469), 146 states have return successors, (468), 468 states have call predecessors, (468), 468 states have call successors, (468) [2021-12-28 03:48:24,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 2655 transitions. [2021-12-28 03:48:24,439 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 2655 transitions. Word has length 65 [2021-12-28 03:48:24,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:24,440 INFO L470 AbstractCegarLoop]: Abstraction has 1918 states and 2655 transitions. [2021-12-28 03:48:24,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-28 03:48:24,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 2655 transitions. [2021-12-28 03:48:24,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-28 03:48:24,443 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:24,443 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 03:48:24,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 03:48:24,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:24,663 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:24,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:24,664 INFO L85 PathProgramCache]: Analyzing trace with hash 175478772, now seen corresponding path program 1 times [2021-12-28 03:48:24,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:24,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290946244] [2021-12-28 03:48:24,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:24,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:24,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:24,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 03:48:24,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:24,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 03:48:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:24,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 03:48:24,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:24,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-28 03:48:24,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:48:24,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:24,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290946244] [2021-12-28 03:48:24,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290946244] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:48:24,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177266294] [2021-12-28 03:48:24,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:24,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:48:24,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:48:24,756 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:48:24,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 03:48:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:25,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:48:25,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:48:25,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:48:25,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:48:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:48:25,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177266294] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:48:25,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:48:25,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2021-12-28 03:48:25,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358452841] [2021-12-28 03:48:25,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:48:25,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 03:48:25,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:25,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 03:48:25,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:48:25,393 INFO L87 Difference]: Start difference. First operand 1918 states and 2655 transitions. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 7 states have internal predecessors, (83), 1 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-28 03:48:30,418 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:48:32,428 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:48:34,453 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:48:37,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:37,144 INFO L93 Difference]: Finished difference Result 3991 states and 5547 transitions. [2021-12-28 03:48:37,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:48:37,144 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 7 states have internal predecessors, (83), 1 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 69 [2021-12-28 03:48:37,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:37,152 INFO L225 Difference]: With dead ends: 3991 [2021-12-28 03:48:37,152 INFO L226 Difference]: Without dead ends: 2076 [2021-12-28 03:48:37,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:48:37,157 INFO L933 BasicCegarLoop]: 789 mSDtfsCounter, 391 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 1929 mSolverCounterSat, 169 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 1946 SdHoareTripleChecker+Invalid, 2101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 1929 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2021-12-28 03:48:37,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 1946 Invalid, 2101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 1929 Invalid, 3 Unknown, 0 Unchecked, 11.6s Time] [2021-12-28 03:48:37,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2021-12-28 03:48:37,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 2076. [2021-12-28 03:48:37,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 1430 states have (on average 1.3146853146853146) internal successors, (1880), 1465 states have internal predecessors, (1880), 499 states have call successors, (499), 147 states have call predecessors, (499), 146 states have return successors, (498), 498 states have call predecessors, (498), 498 states have call successors, (498) [2021-12-28 03:48:37,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 2877 transitions. [2021-12-28 03:48:37,220 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 2877 transitions. Word has length 69 [2021-12-28 03:48:37,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:37,220 INFO L470 AbstractCegarLoop]: Abstraction has 2076 states and 2877 transitions. [2021-12-28 03:48:37,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 7 states have internal predecessors, (83), 1 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-28 03:48:37,221 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 2877 transitions. [2021-12-28 03:48:37,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-28 03:48:37,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:37,223 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2021-12-28 03:48:37,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-28 03:48:37,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-28 03:48:37,440 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:37,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:37,440 INFO L85 PathProgramCache]: Analyzing trace with hash -834193707, now seen corresponding path program 2 times [2021-12-28 03:48:37,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:37,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807223501] [2021-12-28 03:48:37,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:37,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:37,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:37,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:48:37,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:37,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-28 03:48:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:37,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-28 03:48:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:37,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-28 03:48:37,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-28 03:48:37,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:37,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807223501] [2021-12-28 03:48:37,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807223501] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:37,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:48:37,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:48:37,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740344498] [2021-12-28 03:48:37,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:37,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:48:37,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:37,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:48:37,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:48:37,585 INFO L87 Difference]: Start difference. First operand 2076 states and 2877 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-28 03:48:41,581 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:48:43,596 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:48:45,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:45,487 INFO L93 Difference]: Finished difference Result 4521 states and 6345 transitions. [2021-12-28 03:48:45,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:48:45,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 84 [2021-12-28 03:48:45,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:45,498 INFO L225 Difference]: With dead ends: 4521 [2021-12-28 03:48:45,498 INFO L226 Difference]: Without dead ends: 2448 [2021-12-28 03:48:45,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:48:45,505 INFO L933 BasicCegarLoop]: 1048 mSDtfsCounter, 700 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 247 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 2175 SdHoareTripleChecker+Invalid, 1602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-12-28 03:48:45,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [797 Valid, 2175 Invalid, 1602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1353 Invalid, 2 Unknown, 0 Unchecked, 7.8s Time] [2021-12-28 03:48:45,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2021-12-28 03:48:45,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 2080. [2021-12-28 03:48:45,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 1434 states have (on average 1.3138075313807531) internal successors, (1884), 1469 states have internal predecessors, (1884), 499 states have call successors, (499), 147 states have call predecessors, (499), 146 states have return successors, (498), 498 states have call predecessors, (498), 498 states have call successors, (498) [2021-12-28 03:48:45,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 2881 transitions. [2021-12-28 03:48:45,616 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 2881 transitions. Word has length 84 [2021-12-28 03:48:45,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:45,616 INFO L470 AbstractCegarLoop]: Abstraction has 2080 states and 2881 transitions. [2021-12-28 03:48:45,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-28 03:48:45,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 2881 transitions. [2021-12-28 03:48:45,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-28 03:48:45,622 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:45,622 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2021-12-28 03:48:45,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 03:48:45,623 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:45,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:45,623 INFO L85 PathProgramCache]: Analyzing trace with hash 2145382468, now seen corresponding path program 1 times [2021-12-28 03:48:45,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:45,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493968713] [2021-12-28 03:48:45,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:45,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:45,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:45,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:48:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:45,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 03:48:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:45,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 03:48:45,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:45,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 03:48:45,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:45,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-28 03:48:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:45,788 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-28 03:48:45,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:45,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493968713] [2021-12-28 03:48:45,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493968713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:45,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:48:45,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 03:48:45,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795332778] [2021-12-28 03:48:45,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:45,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 03:48:45,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:45,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 03:48:45,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:48:45,790 INFO L87 Difference]: Start difference. First operand 2080 states and 2881 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 03:48:52,335 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:48:55,605 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:48:56,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:48:56,980 INFO L93 Difference]: Finished difference Result 4651 states and 6557 transitions. [2021-12-28 03:48:56,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 03:48:56,983 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 94 [2021-12-28 03:48:56,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:48:57,004 INFO L225 Difference]: With dead ends: 4651 [2021-12-28 03:48:57,004 INFO L226 Difference]: Without dead ends: 2574 [2021-12-28 03:48:57,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:48:57,017 INFO L933 BasicCegarLoop]: 1079 mSDtfsCounter, 729 mSDsluCounter, 2249 mSDsCounter, 0 mSdLazyCounter, 2559 mSolverCounterSat, 423 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 3328 SdHoareTripleChecker+Invalid, 2983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 2559 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:48:57,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 3328 Invalid, 2983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 2559 Invalid, 1 Unknown, 0 Unchecked, 11.0s Time] [2021-12-28 03:48:57,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2021-12-28 03:48:57,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 2092. [2021-12-28 03:48:57,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 1444 states have (on average 1.311634349030471) internal successors, (1894), 1477 states have internal predecessors, (1894), 499 states have call successors, (499), 147 states have call predecessors, (499), 148 states have return successors, (516), 502 states have call predecessors, (516), 498 states have call successors, (516) [2021-12-28 03:48:57,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 2909 transitions. [2021-12-28 03:48:57,134 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 2909 transitions. Word has length 94 [2021-12-28 03:48:57,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:48:57,134 INFO L470 AbstractCegarLoop]: Abstraction has 2092 states and 2909 transitions. [2021-12-28 03:48:57,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 03:48:57,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 2909 transitions. [2021-12-28 03:48:57,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-28 03:48:57,137 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:48:57,137 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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] [2021-12-28 03:48:57,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 03:48:57,138 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:48:57,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:48:57,138 INFO L85 PathProgramCache]: Analyzing trace with hash 923753966, now seen corresponding path program 1 times [2021-12-28 03:48:57,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:48:57,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601599730] [2021-12-28 03:48:57,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:48:57,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:48:57,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:57,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 03:48:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:57,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-28 03:48:57,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:57,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 03:48:57,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:57,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 03:48:57,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:57,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-28 03:48:57,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:48:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-28 03:48:57,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:48:57,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601599730] [2021-12-28 03:48:57,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601599730] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:48:57,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:48:57,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 03:48:57,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70190772] [2021-12-28 03:48:57,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:48:57,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 03:48:57,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:48:57,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 03:48:57,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:48:57,305 INFO L87 Difference]: Start difference. First operand 2092 states and 2909 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 03:48:59,705 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:49:07,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:49:07,745 INFO L93 Difference]: Finished difference Result 4873 states and 6897 transitions. [2021-12-28 03:49:07,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:49:07,746 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 94 [2021-12-28 03:49:07,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:49:07,757 INFO L225 Difference]: With dead ends: 4873 [2021-12-28 03:49:07,758 INFO L226 Difference]: Without dead ends: 2784 [2021-12-28 03:49:07,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:49:07,763 INFO L933 BasicCegarLoop]: 1024 mSDtfsCounter, 748 mSDsluCounter, 2028 mSDsCounter, 0 mSdLazyCounter, 2580 mSolverCounterSat, 461 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 3052 SdHoareTripleChecker+Invalid, 3042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 2580 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2021-12-28 03:49:07,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 3052 Invalid, 3042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [461 Valid, 2580 Invalid, 1 Unknown, 0 Unchecked, 10.3s Time] [2021-12-28 03:49:07,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2021-12-28 03:49:07,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2120. [2021-12-28 03:49:07,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 1472 states have (on average 1.3057065217391304) internal successors, (1922), 1491 states have internal predecessors, (1922), 499 states have call successors, (499), 147 states have call predecessors, (499), 148 states have return successors, (516), 516 states have call predecessors, (516), 498 states have call successors, (516) [2021-12-28 03:49:07,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 2937 transitions. [2021-12-28 03:49:07,844 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 2937 transitions. Word has length 94 [2021-12-28 03:49:07,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:49:07,844 INFO L470 AbstractCegarLoop]: Abstraction has 2120 states and 2937 transitions. [2021-12-28 03:49:07,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 03:49:07,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 2937 transitions. [2021-12-28 03:49:07,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-28 03:49:07,847 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:49:07,848 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:49:07,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 03:49:07,848 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:49:07,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:49:07,848 INFO L85 PathProgramCache]: Analyzing trace with hash -651205810, now seen corresponding path program 1 times [2021-12-28 03:49:07,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:49:07,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078550906] [2021-12-28 03:49:07,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:49:07,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:49:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:49:08,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:49:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:49:08,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 03:49:08,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:49:08,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 03:49:08,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:49:08,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:49:08,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:49:08,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 03:49:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:49:08,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 03:49:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:49:08,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:49:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:49:08,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:49:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:49:08,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-28 03:49:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:49:08,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 03:49:08,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:49:08,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:49:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:49:08,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:49:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:49:08,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:49:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:49:08,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 03:49:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:49:08,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 03:49:08,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:49:08,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-28 03:49:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:49:08,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:49:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:49:08,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:49:08,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:49:08,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 03:49:08,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:49:08,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 03:49:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:49:08,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-12-28 03:49:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:49:08,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-28 03:49:08,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:49:08,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-28 03:49:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:49:08,262 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-28 03:49:08,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:49:08,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078550906] [2021-12-28 03:49:08,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078550906] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:49:08,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:49:08,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 03:49:08,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312471521] [2021-12-28 03:49:08,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:49:08,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:49:08,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:49:08,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:49:08,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:49:08,264 INFO L87 Difference]: Start difference. First operand 2120 states and 2937 transitions. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (25), 4 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-12-28 03:49:10,566 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []