./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/dll2c_insert_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 791161d1 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-simple/dll2c_insert_unequal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1b81f923e96224472f8219a473f794261ff02356a47c6b09b527f0fc600725a8 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 06:27:54,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 06:27:54,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 06:27:54,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 06:27:54,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 06:27:54,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 06:27:54,494 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 06:27:54,496 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 06:27:54,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 06:27:54,502 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 06:27:54,503 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 06:27:54,505 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 06:27:54,506 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 06:27:54,508 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 06:27:54,509 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 06:27:54,512 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 06:27:54,512 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 06:27:54,514 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 06:27:54,515 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 06:27:54,521 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 06:27:54,523 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 06:27:54,524 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 06:27:54,525 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 06:27:54,526 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 06:27:54,531 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 06:27:54,538 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 06:27:54,538 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 06:27:54,539 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 06:27:54,540 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 06:27:54,540 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 06:27:54,541 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 06:27:54,542 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 06:27:54,543 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 06:27:54,544 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 06:27:54,545 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 06:27:54,546 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 06:27:54,546 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 06:27:54,547 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 06:27:54,547 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 06:27:54,548 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 06:27:54,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 06:27:54,550 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 06:27:54,550 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-23 06:27:54,578 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 06:27:54,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 06:27:54,579 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 06:27:54,579 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 06:27:54,579 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 06:27:54,580 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 06:27:54,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 06:27:54,580 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 06:27:54,581 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 06:27:54,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 06:27:54,582 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 06:27:54,582 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 06:27:54,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 06:27:54,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 06:27:54,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 06:27:54,583 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 06:27:54,583 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 06:27:54,583 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 06:27:54,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 06:27:54,583 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 06:27:54,584 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 06:27:54,584 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 06:27:54,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 06:27:54,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 06:27:54,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 06:27:54,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:27:54,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 06:27:54,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 06:27:54,585 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 06:27:54,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-23 06:27:54,586 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b81f923e96224472f8219a473f794261ff02356a47c6b09b527f0fc600725a8 [2022-07-23 06:27:54,792 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 06:27:54,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 06:27:54,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 06:27:54,810 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 06:27:54,810 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 06:27:54,811 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2c_insert_unequal.i [2022-07-23 06:27:54,876 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddfca85a6/15487fbf036248708a089fc0dd781a1e/FLAGc6cddd277 [2022-07-23 06:27:55,238 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 06:27:55,239 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_insert_unequal.i [2022-07-23 06:27:55,254 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddfca85a6/15487fbf036248708a089fc0dd781a1e/FLAGc6cddd277 [2022-07-23 06:27:55,606 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddfca85a6/15487fbf036248708a089fc0dd781a1e [2022-07-23 06:27:55,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 06:27:55,610 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 06:27:55,613 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 06:27:55,613 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 06:27:55,616 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 06:27:55,616 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:27:55" (1/1) ... [2022-07-23 06:27:55,617 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f320421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:27:55, skipping insertion in model container [2022-07-23 06:27:55,618 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:27:55" (1/1) ... [2022-07-23 06:27:55,623 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 06:27:55,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 06:27:55,947 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/list-simple/dll2c_insert_unequal.i[25148,25161] [2022-07-23 06:27:55,951 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:27:55,962 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 06:27:56,005 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/list-simple/dll2c_insert_unequal.i[25148,25161] [2022-07-23 06:27:56,007 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:27:56,030 INFO L208 MainTranslator]: Completed translation [2022-07-23 06:27:56,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:27:56 WrapperNode [2022-07-23 06:27:56,032 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 06:27:56,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 06:27:56,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 06:27:56,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 06:27:56,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:27:56" (1/1) ... [2022-07-23 06:27:56,068 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:27:56" (1/1) ... [2022-07-23 06:27:56,095 INFO L137 Inliner]: procedures = 127, calls = 58, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 191 [2022-07-23 06:27:56,098 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 06:27:56,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 06:27:56,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 06:27:56,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 06:27:56,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:27:56" (1/1) ... [2022-07-23 06:27:56,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:27:56" (1/1) ... [2022-07-23 06:27:56,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:27:56" (1/1) ... [2022-07-23 06:27:56,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:27:56" (1/1) ... [2022-07-23 06:27:56,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:27:56" (1/1) ... [2022-07-23 06:27:56,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:27:56" (1/1) ... [2022-07-23 06:27:56,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:27:56" (1/1) ... [2022-07-23 06:27:56,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 06:27:56,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 06:27:56,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 06:27:56,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 06:27:56,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:27:56" (1/1) ... [2022-07-23 06:27:56,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:27:56,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:27:56,184 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) [2022-07-23 06:27:56,187 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 [2022-07-23 06:27:56,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-23 06:27:56,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-23 06:27:56,213 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-07-23 06:27:56,213 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-07-23 06:27:56,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-23 06:27:56,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-23 06:27:56,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-23 06:27:56,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-23 06:27:56,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-23 06:27:56,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 06:27:56,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-23 06:27:56,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-23 06:27:56,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 06:27:56,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 06:27:56,311 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 06:27:56,313 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 06:27:56,856 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 06:27:56,864 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 06:27:56,864 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-23 06:27:56,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 06:27:56 BoogieIcfgContainer [2022-07-23 06:27:56,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 06:27:56,870 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 06:27:56,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 06:27:56,874 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 06:27:56,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 06:27:55" (1/3) ... [2022-07-23 06:27:56,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bfe2962 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 06:27:56, skipping insertion in model container [2022-07-23 06:27:56,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:27:56" (2/3) ... [2022-07-23 06:27:56,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bfe2962 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 06:27:56, skipping insertion in model container [2022-07-23 06:27:56,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 06:27:56" (3/3) ... [2022-07-23 06:27:56,876 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_insert_unequal.i [2022-07-23 06:27:56,886 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 06:27:56,886 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 82 error locations. [2022-07-23 06:27:56,924 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 06:27:56,929 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@30a63147, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@eaef19f [2022-07-23 06:27:56,930 INFO L358 AbstractCegarLoop]: Starting to check reachability of 82 error locations. [2022-07-23 06:27:56,934 INFO L276 IsEmpty]: Start isEmpty. Operand has 174 states, 87 states have (on average 2.160919540229885) internal successors, (188), 169 states have internal predecessors, (188), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:27:56,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-23 06:27:56,940 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:27:56,941 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-23 06:27:56,941 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:27:56,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:27:56,946 INFO L85 PathProgramCache]: Analyzing trace with hash 897735090, now seen corresponding path program 1 times [2022-07-23 06:27:56,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:27:56,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812829117] [2022-07-23 06:27:56,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:27:56,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:27:57,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:27:57,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:27:57,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:27:57,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812829117] [2022-07-23 06:27:57,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812829117] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:27:57,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:27:57,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:27:57,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989446249] [2022-07-23 06:27:57,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:27:57,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 06:27:57,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:27:57,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 06:27:57,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:27:57,164 INFO L87 Difference]: Start difference. First operand has 174 states, 87 states have (on average 2.160919540229885) internal successors, (188), 169 states have internal predecessors, (188), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-07-23 06:27:57,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:27:57,356 INFO L93 Difference]: Finished difference Result 171 states and 185 transitions. [2022-07-23 06:27:57,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 06:27:57,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2022-07-23 06:27:57,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:27:57,373 INFO L225 Difference]: With dead ends: 171 [2022-07-23 06:27:57,374 INFO L226 Difference]: Without dead ends: 168 [2022-07-23 06:27:57,376 INFO L412 NwaCegarLoop]: 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 [2022-07-23 06:27:57,382 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:27:57,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 269 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:27:57,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-23 06:27:57,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-07-23 06:27:57,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 163 states have internal predecessors, (175), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:27:57,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 181 transitions. [2022-07-23 06:27:57,434 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 181 transitions. Word has length 6 [2022-07-23 06:27:57,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:27:57,434 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 181 transitions. [2022-07-23 06:27:57,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-07-23 06:27:57,434 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 181 transitions. [2022-07-23 06:27:57,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-23 06:27:57,435 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:27:57,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-23 06:27:57,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-23 06:27:57,435 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:27:57,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:27:57,436 INFO L85 PathProgramCache]: Analyzing trace with hash 897735091, now seen corresponding path program 1 times [2022-07-23 06:27:57,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:27:57,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637890162] [2022-07-23 06:27:57,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:27:57,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:27:57,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:27:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:27:57,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:27:57,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637890162] [2022-07-23 06:27:57,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637890162] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:27:57,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:27:57,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:27:57,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013481909] [2022-07-23 06:27:57,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:27:57,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 06:27:57,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:27:57,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 06:27:57,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:27:57,496 INFO L87 Difference]: Start difference. First operand 168 states and 181 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-07-23 06:27:57,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:27:57,616 INFO L93 Difference]: Finished difference Result 165 states and 178 transitions. [2022-07-23 06:27:57,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 06:27:57,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2022-07-23 06:27:57,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:27:57,619 INFO L225 Difference]: With dead ends: 165 [2022-07-23 06:27:57,619 INFO L226 Difference]: Without dead ends: 165 [2022-07-23 06:27:57,619 INFO L412 NwaCegarLoop]: 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 [2022-07-23 06:27:57,620 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 5 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:27:57,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 271 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:27:57,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-23 06:27:57,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-07-23 06:27:57,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 85 states have (on average 2.023529411764706) internal successors, (172), 160 states have internal predecessors, (172), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:27:57,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 178 transitions. [2022-07-23 06:27:57,630 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 178 transitions. Word has length 6 [2022-07-23 06:27:57,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:27:57,631 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 178 transitions. [2022-07-23 06:27:57,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-07-23 06:27:57,631 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 178 transitions. [2022-07-23 06:27:57,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 06:27:57,632 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:27:57,632 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:27:57,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-23 06:27:57,633 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:27:57,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:27:57,633 INFO L85 PathProgramCache]: Analyzing trace with hash 165946077, now seen corresponding path program 1 times [2022-07-23 06:27:57,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:27:57,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478459185] [2022-07-23 06:27:57,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:27:57,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:27:57,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:27:57,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:27:57,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:27:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:27:57,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:27:57,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478459185] [2022-07-23 06:27:57,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478459185] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:27:57,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:27:57,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 06:27:57,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466163864] [2022-07-23 06:27:57,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:27:57,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:27:57,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:27:57,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:27:57,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:27:57,743 INFO L87 Difference]: Start difference. First operand 165 states and 178 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:27:57,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:27:57,910 INFO L93 Difference]: Finished difference Result 176 states and 191 transitions. [2022-07-23 06:27:57,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:27:57,911 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-07-23 06:27:57,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:27:57,912 INFO L225 Difference]: With dead ends: 176 [2022-07-23 06:27:57,912 INFO L226 Difference]: Without dead ends: 176 [2022-07-23 06:27:57,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:27:57,914 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 10 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:27:57,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 406 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:27:57,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-07-23 06:27:57,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 166. [2022-07-23 06:27:57,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 86 states have (on average 2.011627906976744) internal successors, (173), 161 states have internal predecessors, (173), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:27:57,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 179 transitions. [2022-07-23 06:27:57,925 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 179 transitions. Word has length 14 [2022-07-23 06:27:57,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:27:57,925 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 179 transitions. [2022-07-23 06:27:57,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:27:57,925 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 179 transitions. [2022-07-23 06:27:57,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-23 06:27:57,926 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:27:57,926 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:27:57,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-23 06:27:57,927 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:27:57,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:27:57,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1886331456, now seen corresponding path program 1 times [2022-07-23 06:27:57,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:27:57,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266900530] [2022-07-23 06:27:57,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:27:57,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:27:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:27:58,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:27:58,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:27:58,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-23 06:27:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:27:58,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-23 06:27:58,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:27:58,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266900530] [2022-07-23 06:27:58,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266900530] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:27:58,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:27:58,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 06:27:58,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505202344] [2022-07-23 06:27:58,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:27:58,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 06:27:58,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:27:58,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 06:27:58,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:27:58,070 INFO L87 Difference]: Start difference. First operand 166 states and 179 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:27:58,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:27:58,379 INFO L93 Difference]: Finished difference Result 166 states and 180 transitions. [2022-07-23 06:27:58,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 06:27:58,380 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-07-23 06:27:58,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:27:58,382 INFO L225 Difference]: With dead ends: 166 [2022-07-23 06:27:58,382 INFO L226 Difference]: Without dead ends: 166 [2022-07-23 06:27:58,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:27:58,384 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 21 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:27:58,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 567 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 06:27:58,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-23 06:27:58,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2022-07-23 06:27:58,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 86 states have (on average 2.0) internal successors, (172), 160 states have internal predecessors, (172), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:27:58,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 178 transitions. [2022-07-23 06:27:58,391 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 178 transitions. Word has length 24 [2022-07-23 06:27:58,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:27:58,392 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 178 transitions. [2022-07-23 06:27:58,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:27:58,392 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 178 transitions. [2022-07-23 06:27:58,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-23 06:27:58,393 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:27:58,393 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:27:58,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-23 06:27:58,394 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:27:58,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:27:58,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1886331457, now seen corresponding path program 1 times [2022-07-23 06:27:58,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:27:58,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097130993] [2022-07-23 06:27:58,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:27:58,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:27:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:27:58,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:27:58,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:27:58,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-23 06:27:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:27:58,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:27:58,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:27:58,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097130993] [2022-07-23 06:27:58,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097130993] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:27:58,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:27:58,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 06:27:58,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946857394] [2022-07-23 06:27:58,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:27:58,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 06:27:58,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:27:58,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 06:27:58,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:27:58,562 INFO L87 Difference]: Start difference. First operand 165 states and 178 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:27:58,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:27:58,849 INFO L93 Difference]: Finished difference Result 165 states and 179 transitions. [2022-07-23 06:27:58,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 06:27:58,852 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-07-23 06:27:58,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:27:58,853 INFO L225 Difference]: With dead ends: 165 [2022-07-23 06:27:58,854 INFO L226 Difference]: Without dead ends: 165 [2022-07-23 06:27:58,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:27:58,855 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 19 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:27:58,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 591 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 06:27:58,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-23 06:27:58,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2022-07-23 06:27:58,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 86 states have (on average 1.9883720930232558) internal successors, (171), 159 states have internal predecessors, (171), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:27:58,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 177 transitions. [2022-07-23 06:27:58,875 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 177 transitions. Word has length 24 [2022-07-23 06:27:58,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:27:58,875 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 177 transitions. [2022-07-23 06:27:58,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:27:58,876 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 177 transitions. [2022-07-23 06:27:58,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-23 06:27:58,876 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:27:58,877 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:27:58,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-23 06:27:58,877 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:27:58,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:27:58,878 INFO L85 PathProgramCache]: Analyzing trace with hash 288330017, now seen corresponding path program 1 times [2022-07-23 06:27:58,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:27:58,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350737321] [2022-07-23 06:27:58,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:27:58,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:27:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:27:58,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:27:58,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:27:58,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-23 06:27:58,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:27:59,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:27:59,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:27:59,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350737321] [2022-07-23 06:27:59,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350737321] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:27:59,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296617563] [2022-07-23 06:27:59,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:27:59,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:27:59,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:27:59,051 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) [2022-07-23 06:27:59,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-23 06:27:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:27:59,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-23 06:27:59,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:27:59,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:27:59,411 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-23 06:27:59,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-23 06:27:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:27:59,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:27:59,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296617563] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:27:59,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:27:59,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2022-07-23 06:27:59,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713012458] [2022-07-23 06:27:59,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:27:59,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 06:27:59,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:27:59,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 06:27:59,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-23 06:27:59,478 INFO L87 Difference]: Start difference. First operand 164 states and 177 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:27:59,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:27:59,873 INFO L93 Difference]: Finished difference Result 189 states and 205 transitions. [2022-07-23 06:27:59,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 06:27:59,874 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-07-23 06:27:59,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:27:59,876 INFO L225 Difference]: With dead ends: 189 [2022-07-23 06:27:59,876 INFO L226 Difference]: Without dead ends: 189 [2022-07-23 06:27:59,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-07-23 06:27:59,880 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 151 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 06:27:59,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 536 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 561 Invalid, 0 Unknown, 3 Unchecked, 0.4s Time] [2022-07-23 06:27:59,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-07-23 06:27:59,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 169. [2022-07-23 06:27:59,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 90 states have (on average 1.9666666666666666) internal successors, (177), 163 states have internal predecessors, (177), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:27:59,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 185 transitions. [2022-07-23 06:27:59,898 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 185 transitions. Word has length 26 [2022-07-23 06:27:59,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:27:59,898 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 185 transitions. [2022-07-23 06:27:59,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:27:59,899 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 185 transitions. [2022-07-23 06:27:59,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-23 06:27:59,900 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:27:59,900 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:27:59,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:00,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-23 06:28:00,115 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:28:00,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:00,116 INFO L85 PathProgramCache]: Analyzing trace with hash 288330018, now seen corresponding path program 1 times [2022-07-23 06:28:00,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:28:00,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846713621] [2022-07-23 06:28:00,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:00,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:28:00,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:00,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:28:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:00,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-23 06:28:00,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:00,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:28:00,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:28:00,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846713621] [2022-07-23 06:28:00,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846713621] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:28:00,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938079951] [2022-07-23 06:28:00,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:00,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:28:00,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:28:00,442 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) [2022-07-23 06:28:00,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-23 06:28:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:00,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-23 06:28:00,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:00,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:28:00,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:28:00,890 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-23 06:28:00,909 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:28:00,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-23 06:28:00,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:28:00,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:28:07,158 WARN L233 SmtUtils]: Spent 6.11s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-23 06:28:07,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938079951] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:28:07,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:28:07,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2022-07-23 06:28:07,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423901257] [2022-07-23 06:28:07,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:28:07,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-23 06:28:07,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:28:07,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-23 06:28:07,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-07-23 06:28:07,162 INFO L87 Difference]: Start difference. First operand 169 states and 185 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-23 06:28:07,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:07,847 INFO L93 Difference]: Finished difference Result 171 states and 186 transitions. [2022-07-23 06:28:07,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 06:28:07,848 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2022-07-23 06:28:07,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:07,849 INFO L225 Difference]: With dead ends: 171 [2022-07-23 06:28:07,849 INFO L226 Difference]: Without dead ends: 171 [2022-07-23 06:28:07,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-07-23 06:28:07,851 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 27 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:07,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 1020 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1076 Invalid, 0 Unknown, 4 Unchecked, 0.6s Time] [2022-07-23 06:28:07,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-23 06:28:07,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2022-07-23 06:28:07,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 90 states have (on average 1.9555555555555555) internal successors, (176), 163 states have internal predecessors, (176), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:28:07,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 184 transitions. [2022-07-23 06:28:07,855 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 184 transitions. Word has length 26 [2022-07-23 06:28:07,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:07,855 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 184 transitions. [2022-07-23 06:28:07,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-23 06:28:07,856 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 184 transitions. [2022-07-23 06:28:07,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-23 06:28:07,856 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:07,856 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:07,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:08,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-07-23 06:28:08,084 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:28:08,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:08,084 INFO L85 PathProgramCache]: Analyzing trace with hash -2087573769, now seen corresponding path program 1 times [2022-07-23 06:28:08,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:28:08,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943521773] [2022-07-23 06:28:08,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:08,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:28:08,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:08,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:28:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:08,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-23 06:28:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:28:08,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:28:08,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943521773] [2022-07-23 06:28:08,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943521773] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:28:08,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764419361] [2022-07-23 06:28:08,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:08,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:28:08,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:28:08,161 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) [2022-07-23 06:28:08,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-23 06:28:08,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:08,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-23 06:28:08,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:08,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:28:08,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:28:08,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:28:08,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764419361] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:28:08,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 06:28:08,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-07-23 06:28:08,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053681329] [2022-07-23 06:28:08,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 06:28:08,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 06:28:08,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:28:08,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 06:28:08,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:28:08,362 INFO L87 Difference]: Start difference. First operand 169 states and 184 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:28:08,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:08,521 INFO L93 Difference]: Finished difference Result 170 states and 184 transitions. [2022-07-23 06:28:08,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 06:28:08,521 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-07-23 06:28:08,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:08,522 INFO L225 Difference]: With dead ends: 170 [2022-07-23 06:28:08,522 INFO L226 Difference]: Without dead ends: 170 [2022-07-23 06:28:08,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:28:08,522 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 4 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:08,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 873 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:28:08,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-23 06:28:08,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2022-07-23 06:28:08,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 90 states have (on average 1.9444444444444444) internal successors, (175), 163 states have internal predecessors, (175), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:28:08,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 183 transitions. [2022-07-23 06:28:08,527 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 183 transitions. Word has length 28 [2022-07-23 06:28:08,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:08,527 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 183 transitions. [2022-07-23 06:28:08,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:28:08,527 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 183 transitions. [2022-07-23 06:28:08,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-23 06:28:08,527 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:08,528 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:08,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-23 06:28:08,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:28:08,739 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:28:08,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:08,739 INFO L85 PathProgramCache]: Analyzing trace with hash -295058062, now seen corresponding path program 1 times [2022-07-23 06:28:08,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:28:08,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104918427] [2022-07-23 06:28:08,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:08,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:28:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:08,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:28:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:08,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-23 06:28:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:08,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 06:28:08,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:28:08,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104918427] [2022-07-23 06:28:08,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104918427] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:28:08,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525586145] [2022-07-23 06:28:08,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:08,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:28:08,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:28:08,831 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) [2022-07-23 06:28:08,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-23 06:28:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:08,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 06:28:08,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:08,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 06:28:08,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:28:08,981 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-23 06:28:08,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-07-23 06:28:09,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 06:28:09,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525586145] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:28:09,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 06:28:09,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 5 [2022-07-23 06:28:09,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861854829] [2022-07-23 06:28:09,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 06:28:09,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 06:28:09,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:28:09,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 06:28:09,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:28:09,004 INFO L87 Difference]: Start difference. First operand 169 states and 183 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:28:09,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:09,227 INFO L93 Difference]: Finished difference Result 174 states and 190 transitions. [2022-07-23 06:28:09,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 06:28:09,227 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-07-23 06:28:09,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:09,228 INFO L225 Difference]: With dead ends: 174 [2022-07-23 06:28:09,228 INFO L226 Difference]: Without dead ends: 174 [2022-07-23 06:28:09,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:28:09,229 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 13 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:09,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 408 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 06:28:09,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-07-23 06:28:09,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2022-07-23 06:28:09,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 93 states have (on average 1.935483870967742) internal successors, (180), 166 states have internal predecessors, (180), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:28:09,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 188 transitions. [2022-07-23 06:28:09,237 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 188 transitions. Word has length 29 [2022-07-23 06:28:09,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:09,237 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 188 transitions. [2022-07-23 06:28:09,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:28:09,237 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 188 transitions. [2022-07-23 06:28:09,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-23 06:28:09,240 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:09,240 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:09,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:09,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:28:09,452 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:28:09,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:09,452 INFO L85 PathProgramCache]: Analyzing trace with hash -295058061, now seen corresponding path program 1 times [2022-07-23 06:28:09,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:28:09,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416674966] [2022-07-23 06:28:09,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:09,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:28:09,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:09,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:28:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:09,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-23 06:28:09,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:09,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:28:09,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:28:09,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416674966] [2022-07-23 06:28:09,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416674966] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:28:09,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562286401] [2022-07-23 06:28:09,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:09,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:28:09,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:28:09,620 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) [2022-07-23 06:28:09,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-23 06:28:09,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:09,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-23 06:28:09,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:28:09,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:28:09,901 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:28:09,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-07-23 06:28:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:28:10,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562286401] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:28:10,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 06:28:10,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2022-07-23 06:28:10,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200907578] [2022-07-23 06:28:10,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 06:28:10,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-23 06:28:10,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:28:10,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-23 06:28:10,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-07-23 06:28:10,004 INFO L87 Difference]: Start difference. First operand 172 states and 188 transitions. Second operand has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-23 06:28:10,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:10,339 INFO L93 Difference]: Finished difference Result 179 states and 196 transitions. [2022-07-23 06:28:10,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 06:28:10,343 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-07-23 06:28:10,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:10,344 INFO L225 Difference]: With dead ends: 179 [2022-07-23 06:28:10,344 INFO L226 Difference]: Without dead ends: 179 [2022-07-23 06:28:10,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-07-23 06:28:10,345 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 26 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:10,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 1477 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 06:28:10,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-23 06:28:10,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 172. [2022-07-23 06:28:10,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 93 states have (on average 1.924731182795699) internal successors, (179), 166 states have internal predecessors, (179), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:28:10,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 187 transitions. [2022-07-23 06:28:10,350 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 187 transitions. Word has length 29 [2022-07-23 06:28:10,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:10,350 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 187 transitions. [2022-07-23 06:28:10,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-23 06:28:10,350 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 187 transitions. [2022-07-23 06:28:10,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-23 06:28:10,351 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:10,351 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:10,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:10,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-23 06:28:10,564 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:28:10,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:10,564 INFO L85 PathProgramCache]: Analyzing trace with hash -556865325, now seen corresponding path program 1 times [2022-07-23 06:28:10,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:28:10,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674055301] [2022-07-23 06:28:10,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:10,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:28:10,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:10,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:28:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:10,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-23 06:28:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-23 06:28:10,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:28:10,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674055301] [2022-07-23 06:28:10,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674055301] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:28:10,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:28:10,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-23 06:28:10,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999379303] [2022-07-23 06:28:10,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:28:10,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 06:28:10,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:28:10,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 06:28:10,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:28:10,662 INFO L87 Difference]: Start difference. First operand 172 states and 187 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:28:10,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:10,982 INFO L93 Difference]: Finished difference Result 172 states and 187 transitions. [2022-07-23 06:28:10,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 06:28:10,982 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-07-23 06:28:10,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:10,984 INFO L225 Difference]: With dead ends: 172 [2022-07-23 06:28:10,984 INFO L226 Difference]: Without dead ends: 172 [2022-07-23 06:28:10,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-23 06:28:10,984 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 23 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:10,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 638 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 06:28:10,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-07-23 06:28:10,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2022-07-23 06:28:10,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 93 states have (on average 1.913978494623656) internal successors, (178), 165 states have internal predecessors, (178), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:28:10,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 186 transitions. [2022-07-23 06:28:10,988 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 186 transitions. Word has length 30 [2022-07-23 06:28:10,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:10,988 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 186 transitions. [2022-07-23 06:28:10,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:28:10,989 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 186 transitions. [2022-07-23 06:28:10,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-23 06:28:10,989 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:10,989 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:10,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-23 06:28:10,989 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:28:10,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:10,990 INFO L85 PathProgramCache]: Analyzing trace with hash -556865324, now seen corresponding path program 1 times [2022-07-23 06:28:10,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:28:10,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788501881] [2022-07-23 06:28:10,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:10,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:28:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:11,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:28:11,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:11,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-23 06:28:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:11,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:28:11,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:28:11,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788501881] [2022-07-23 06:28:11,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788501881] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:28:11,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:28:11,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-23 06:28:11,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605832717] [2022-07-23 06:28:11,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:28:11,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 06:28:11,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:28:11,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 06:28:11,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:28:11,128 INFO L87 Difference]: Start difference. First operand 171 states and 186 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:28:11,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:11,460 INFO L93 Difference]: Finished difference Result 170 states and 185 transitions. [2022-07-23 06:28:11,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 06:28:11,461 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-07-23 06:28:11,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:11,462 INFO L225 Difference]: With dead ends: 170 [2022-07-23 06:28:11,462 INFO L226 Difference]: Without dead ends: 170 [2022-07-23 06:28:11,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-23 06:28:11,463 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 20 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:11,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 668 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 06:28:11,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-23 06:28:11,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-07-23 06:28:11,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 93 states have (on average 1.903225806451613) internal successors, (177), 164 states have internal predecessors, (177), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:28:11,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 185 transitions. [2022-07-23 06:28:11,467 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 185 transitions. Word has length 30 [2022-07-23 06:28:11,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:11,469 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 185 transitions. [2022-07-23 06:28:11,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:28:11,469 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 185 transitions. [2022-07-23 06:28:11,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-23 06:28:11,472 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:11,472 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:11,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-23 06:28:11,472 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:28:11,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:11,473 INFO L85 PathProgramCache]: Analyzing trace with hash 311753782, now seen corresponding path program 1 times [2022-07-23 06:28:11,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:28:11,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111547421] [2022-07-23 06:28:11,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:11,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:28:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:11,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:28:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:11,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-23 06:28:11,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:11,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-23 06:28:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-23 06:28:11,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:28:11,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111547421] [2022-07-23 06:28:11,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111547421] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:28:11,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770559673] [2022-07-23 06:28:11,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:11,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:28:11,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:28:11,578 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) [2022-07-23 06:28:11,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-23 06:28:11,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:11,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 06:28:11,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 06:28:11,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:28:11,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770559673] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:28:11,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 06:28:11,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-07-23 06:28:11,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230799771] [2022-07-23 06:28:11,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:28:11,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:28:11,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:28:11,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:28:11,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:28:11,773 INFO L87 Difference]: Start difference. First operand 170 states and 185 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:28:11,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:11,786 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2022-07-23 06:28:11,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:28:11,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-07-23 06:28:11,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:11,787 INFO L225 Difference]: With dead ends: 158 [2022-07-23 06:28:11,787 INFO L226 Difference]: Without dead ends: 158 [2022-07-23 06:28:11,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:28:11,789 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 294 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:11,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 182 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:28:11,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-07-23 06:28:11,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2022-07-23 06:28:11,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 86 states have (on average 1.8953488372093024) internal successors, (163), 153 states have internal predecessors, (163), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:28:11,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 169 transitions. [2022-07-23 06:28:11,794 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 169 transitions. Word has length 41 [2022-07-23 06:28:11,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:11,795 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 169 transitions. [2022-07-23 06:28:11,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:28:11,795 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 169 transitions. [2022-07-23 06:28:11,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-23 06:28:11,798 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:11,798 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:11,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:12,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:28:12,023 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:28:12,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:12,023 INFO L85 PathProgramCache]: Analyzing trace with hash -670127466, now seen corresponding path program 1 times [2022-07-23 06:28:12,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:28:12,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455119366] [2022-07-23 06:28:12,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:12,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:28:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:12,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:28:12,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:12,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-23 06:28:12,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:12,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-23 06:28:12,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-23 06:28:12,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:28:12,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455119366] [2022-07-23 06:28:12,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455119366] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:28:12,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926481507] [2022-07-23 06:28:12,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:12,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:28:12,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:28:12,252 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) [2022-07-23 06:28:12,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-23 06:28:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:12,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-23 06:28:12,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:12,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:28:12,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 06:28:12,551 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:28:12,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-23 06:28:12,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-23 06:28:12,791 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 06:28:12,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:28:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-23 06:28:12,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:28:15,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926481507] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:28:15,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:28:15,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 16 [2022-07-23 06:28:15,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543698721] [2022-07-23 06:28:15,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:28:15,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-23 06:28:15,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:28:15,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-23 06:28:15,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=312, Unknown=1, NotChecked=0, Total=380 [2022-07-23 06:28:15,018 INFO L87 Difference]: Start difference. First operand 158 states and 169 transitions. Second operand has 17 states, 16 states have (on average 3.6875) internal successors, (59), 14 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-23 06:28:15,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:15,373 INFO L93 Difference]: Finished difference Result 166 states and 178 transitions. [2022-07-23 06:28:15,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 06:28:15,373 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.6875) internal successors, (59), 14 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2022-07-23 06:28:15,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:15,374 INFO L225 Difference]: With dead ends: 166 [2022-07-23 06:28:15,374 INFO L226 Difference]: Without dead ends: 166 [2022-07-23 06:28:15,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=89, Invalid=416, Unknown=1, NotChecked=0, Total=506 [2022-07-23 06:28:15,375 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 266 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:15,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 723 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 440 Invalid, 0 Unknown, 237 Unchecked, 0.3s Time] [2022-07-23 06:28:15,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-23 06:28:15,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 148. [2022-07-23 06:28:15,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 86 states have (on average 1.7790697674418605) internal successors, (153), 143 states have internal predecessors, (153), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:28:15,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 159 transitions. [2022-07-23 06:28:15,392 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 159 transitions. Word has length 43 [2022-07-23 06:28:15,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:15,392 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 159 transitions. [2022-07-23 06:28:15,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.6875) internal successors, (59), 14 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-23 06:28:15,393 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 159 transitions. [2022-07-23 06:28:15,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-23 06:28:15,393 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:15,393 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:15,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:15,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:28:15,607 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:28:15,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:15,608 INFO L85 PathProgramCache]: Analyzing trace with hash -670127465, now seen corresponding path program 1 times [2022-07-23 06:28:15,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:28:15,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970325787] [2022-07-23 06:28:15,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:15,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:28:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:15,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:28:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:15,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-23 06:28:15,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:15,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-23 06:28:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-23 06:28:15,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:28:15,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970325787] [2022-07-23 06:28:15,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970325787] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:28:15,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188599701] [2022-07-23 06:28:15,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:15,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:28:15,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:28:15,880 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) [2022-07-23 06:28:15,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-23 06:28:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:16,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-23 06:28:16,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:16,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:28:16,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 06:28:16,237 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-23 06:28:16,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:16,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-23 06:28:16,448 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: line 120027 column 46: unknown constant v_#length_BEFORE_CALL_4 at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1458) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.assertTerm(Scriptor.java:147) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript$DiffTransformer.checkOrAddAxiom(DiffWrapperScript.java:161) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript$DiffTransformer.convertApplicationTerm(DiffWrapperScript.java:171) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:352) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:285) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.assertTerm(DiffWrapperScript.java:109) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.assertTerm(WrapperScript.java:158) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.assertTerm(ManagedScript.java:134) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:824) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:768) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:582) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:300) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:152) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-07-23 06:28:16,453 INFO L158 Benchmark]: Toolchain (without parser) took 20843.03ms. Allocated memory was 98.6MB in the beginning and 176.2MB in the end (delta: 77.6MB). Free memory was 69.0MB in the beginning and 78.3MB in the end (delta: -9.3MB). Peak memory consumption was 68.3MB. Max. memory is 16.1GB. [2022-07-23 06:28:16,453 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 98.6MB. Free memory is still 53.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-23 06:28:16,454 INFO L158 Benchmark]: CACSL2BoogieTranslator took 419.67ms. Allocated memory is still 98.6MB. Free memory was 68.8MB in the beginning and 64.1MB in the end (delta: 4.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-23 06:28:16,454 INFO L158 Benchmark]: Boogie Procedure Inliner took 64.39ms. Allocated memory is still 98.6MB. Free memory was 64.1MB in the beginning and 61.6MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-23 06:28:16,454 INFO L158 Benchmark]: Boogie Preprocessor took 54.77ms. Allocated memory is still 98.6MB. Free memory was 61.6MB in the beginning and 59.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-23 06:28:16,454 INFO L158 Benchmark]: RCFGBuilder took 713.60ms. Allocated memory was 98.6MB in the beginning and 119.5MB in the end (delta: 21.0MB). Free memory was 59.5MB in the beginning and 83.4MB in the end (delta: -23.8MB). Peak memory consumption was 19.0MB. Max. memory is 16.1GB. [2022-07-23 06:28:16,454 INFO L158 Benchmark]: TraceAbstraction took 19583.02ms. Allocated memory was 119.5MB in the beginning and 176.2MB in the end (delta: 56.6MB). Free memory was 83.4MB in the beginning and 78.3MB in the end (delta: 5.0MB). Peak memory consumption was 61.1MB. Max. memory is 16.1GB. [2022-07-23 06:28:16,456 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 98.6MB. Free memory is still 53.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 419.67ms. Allocated memory is still 98.6MB. Free memory was 68.8MB in the beginning and 64.1MB in the end (delta: 4.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 64.39ms. Allocated memory is still 98.6MB. Free memory was 64.1MB in the beginning and 61.6MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 54.77ms. Allocated memory is still 98.6MB. Free memory was 61.6MB in the beginning and 59.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 713.60ms. Allocated memory was 98.6MB in the beginning and 119.5MB in the end (delta: 21.0MB). Free memory was 59.5MB in the beginning and 83.4MB in the end (delta: -23.8MB). Peak memory consumption was 19.0MB. Max. memory is 16.1GB. * TraceAbstraction took 19583.02ms. Allocated memory was 119.5MB in the beginning and 176.2MB in the end (delta: 56.6MB). Free memory was 83.4MB in the beginning and 78.3MB in the end (delta: 5.0MB). Peak memory consumption was 61.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: line 120027 column 46: unknown constant v_#length_BEFORE_CALL_4 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: line 120027 column 46: unknown constant v_#length_BEFORE_CALL_4: de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1458) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-23 06:28:16,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 1 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-simple/dll2c_insert_unequal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1b81f923e96224472f8219a473f794261ff02356a47c6b09b527f0fc600725a8 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 06:28:18,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 06:28:18,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 06:28:18,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 06:28:18,500 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 06:28:18,501 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 06:28:18,505 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 06:28:18,507 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 06:28:18,509 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 06:28:18,514 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 06:28:18,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 06:28:18,517 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 06:28:18,517 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 06:28:18,519 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 06:28:18,520 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 06:28:18,525 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 06:28:18,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 06:28:18,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 06:28:18,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 06:28:18,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 06:28:18,535 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 06:28:18,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 06:28:18,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 06:28:18,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 06:28:18,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 06:28:18,546 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 06:28:18,547 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 06:28:18,547 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 06:28:18,548 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 06:28:18,548 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 06:28:18,549 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 06:28:18,549 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 06:28:18,551 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 06:28:18,551 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 06:28:18,553 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 06:28:18,553 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 06:28:18,554 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 06:28:18,554 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 06:28:18,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 06:28:18,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 06:28:18,556 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 06:28:18,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 06:28:18,568 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-23 06:28:18,602 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 06:28:18,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 06:28:18,603 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 06:28:18,603 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 06:28:18,604 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 06:28:18,604 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 06:28:18,605 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 06:28:18,605 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 06:28:18,605 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 06:28:18,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 06:28:18,606 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 06:28:18,606 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 06:28:18,606 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 06:28:18,607 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 06:28:18,607 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 06:28:18,607 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 06:28:18,607 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 06:28:18,607 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 06:28:18,608 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 06:28:18,608 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 06:28:18,608 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-23 06:28:18,608 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-23 06:28:18,608 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 06:28:18,609 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 06:28:18,609 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 06:28:18,609 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 06:28:18,609 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 06:28:18,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:28:18,610 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 06:28:18,610 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 06:28:18,610 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-23 06:28:18,610 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-23 06:28:18,610 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-23 06:28:18,611 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b81f923e96224472f8219a473f794261ff02356a47c6b09b527f0fc600725a8 [2022-07-23 06:28:18,921 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 06:28:18,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 06:28:18,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 06:28:18,941 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 06:28:18,942 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 06:28:18,943 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2c_insert_unequal.i [2022-07-23 06:28:18,992 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/368af2674/2d4a952f97c94cd0b8618ff7b9bbaf2b/FLAGa94fad01e [2022-07-23 06:28:19,439 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 06:28:19,440 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_insert_unequal.i [2022-07-23 06:28:19,450 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/368af2674/2d4a952f97c94cd0b8618ff7b9bbaf2b/FLAGa94fad01e [2022-07-23 06:28:19,967 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/368af2674/2d4a952f97c94cd0b8618ff7b9bbaf2b [2022-07-23 06:28:19,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 06:28:19,971 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 06:28:19,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 06:28:19,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 06:28:19,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 06:28:19,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:28:19" (1/1) ... [2022-07-23 06:28:19,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f227d1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:28:19, skipping insertion in model container [2022-07-23 06:28:19,978 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:28:19" (1/1) ... [2022-07-23 06:28:19,984 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 06:28:20,011 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 06:28:20,306 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/list-simple/dll2c_insert_unequal.i[25148,25161] [2022-07-23 06:28:20,308 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:28:20,316 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 06:28:20,361 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/list-simple/dll2c_insert_unequal.i[25148,25161] [2022-07-23 06:28:20,361 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:28:20,400 INFO L208 MainTranslator]: Completed translation [2022-07-23 06:28:20,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:28:20 WrapperNode [2022-07-23 06:28:20,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 06:28:20,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 06:28:20,403 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 06:28:20,403 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 06:28:20,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:28:20" (1/1) ... [2022-07-23 06:28:20,445 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:28:20" (1/1) ... [2022-07-23 06:28:20,486 INFO L137 Inliner]: procedures = 130, calls = 58, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 192 [2022-07-23 06:28:20,486 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 06:28:20,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 06:28:20,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 06:28:20,488 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 06:28:20,495 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:28:20" (1/1) ... [2022-07-23 06:28:20,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:28:20" (1/1) ... [2022-07-23 06:28:20,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:28:20" (1/1) ... [2022-07-23 06:28:20,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:28:20" (1/1) ... [2022-07-23 06:28:20,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:28:20" (1/1) ... [2022-07-23 06:28:20,536 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:28:20" (1/1) ... [2022-07-23 06:28:20,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:28:20" (1/1) ... [2022-07-23 06:28:20,555 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 06:28:20,556 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 06:28:20,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 06:28:20,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 06:28:20,560 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:28:20" (1/1) ... [2022-07-23 06:28:20,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:28:20,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:28:20,591 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) [2022-07-23 06:28:20,594 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 [2022-07-23 06:28:20,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-23 06:28:20,621 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-07-23 06:28:20,621 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-07-23 06:28:20,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-23 06:28:20,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-23 06:28:20,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-23 06:28:20,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-23 06:28:20,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-23 06:28:20,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 06:28:20,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-23 06:28:20,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-23 06:28:20,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-23 06:28:20,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 06:28:20,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 06:28:20,747 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 06:28:20,749 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 06:28:21,590 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 06:28:21,600 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 06:28:21,600 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-23 06:28:21,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 06:28:21 BoogieIcfgContainer [2022-07-23 06:28:21,603 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 06:28:21,604 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 06:28:21,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 06:28:21,607 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 06:28:21,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 06:28:19" (1/3) ... [2022-07-23 06:28:21,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ca145d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 06:28:21, skipping insertion in model container [2022-07-23 06:28:21,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:28:20" (2/3) ... [2022-07-23 06:28:21,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ca145d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 06:28:21, skipping insertion in model container [2022-07-23 06:28:21,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 06:28:21" (3/3) ... [2022-07-23 06:28:21,612 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_insert_unequal.i [2022-07-23 06:28:21,624 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 06:28:21,624 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 82 error locations. [2022-07-23 06:28:21,671 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 06:28:21,676 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@e138ceb, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@487202ac [2022-07-23 06:28:21,677 INFO L358 AbstractCegarLoop]: Starting to check reachability of 82 error locations. [2022-07-23 06:28:21,681 INFO L276 IsEmpty]: Start isEmpty. Operand has 174 states, 87 states have (on average 2.160919540229885) internal successors, (188), 169 states have internal predecessors, (188), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:28:21,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-23 06:28:21,688 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:21,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-23 06:28:21,690 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:28:21,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:21,694 INFO L85 PathProgramCache]: Analyzing trace with hash 897735090, now seen corresponding path program 1 times [2022-07-23 06:28:21,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:28:21,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211363181] [2022-07-23 06:28:21,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:21,705 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:28:21,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:28:21,708 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:28:21,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-23 06:28:21,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:21,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 06:28:21,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:21,884 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:28:21,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:28:21,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:28:21,899 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:28:21,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211363181] [2022-07-23 06:28:21,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211363181] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:28:21,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:28:21,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:28:21,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958056714] [2022-07-23 06:28:21,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:28:21,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 06:28:21,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:28:21,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 06:28:21,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:28:21,945 INFO L87 Difference]: Start difference. First operand has 174 states, 87 states have (on average 2.160919540229885) internal successors, (188), 169 states have internal predecessors, (188), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-07-23 06:28:22,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:22,260 INFO L93 Difference]: Finished difference Result 171 states and 185 transitions. [2022-07-23 06:28:22,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 06:28:22,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2022-07-23 06:28:22,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:22,274 INFO L225 Difference]: With dead ends: 171 [2022-07-23 06:28:22,274 INFO L226 Difference]: Without dead ends: 168 [2022-07-23 06:28:22,276 INFO L412 NwaCegarLoop]: 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 [2022-07-23 06:28:22,279 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:22,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 269 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 06:28:22,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-23 06:28:22,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-07-23 06:28:22,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 163 states have internal predecessors, (175), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:28:22,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 181 transitions. [2022-07-23 06:28:22,338 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 181 transitions. Word has length 6 [2022-07-23 06:28:22,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:22,339 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 181 transitions. [2022-07-23 06:28:22,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-07-23 06:28:22,339 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 181 transitions. [2022-07-23 06:28:22,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-23 06:28:22,340 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:22,340 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-23 06:28:22,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:22,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:28:22,551 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:28:22,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:22,552 INFO L85 PathProgramCache]: Analyzing trace with hash 897735091, now seen corresponding path program 1 times [2022-07-23 06:28:22,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:28:22,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591104634] [2022-07-23 06:28:22,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:22,555 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:28:22,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:28:22,556 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:28:22,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-23 06:28:22,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:22,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:28:22,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:22,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:28:22,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:28:22,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:28:22,659 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:28:22,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1591104634] [2022-07-23 06:28:22,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1591104634] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:28:22,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:28:22,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:28:22,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858530613] [2022-07-23 06:28:22,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:28:22,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 06:28:22,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:28:22,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 06:28:22,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:28:22,668 INFO L87 Difference]: Start difference. First operand 168 states and 181 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-07-23 06:28:23,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:23,008 INFO L93 Difference]: Finished difference Result 165 states and 178 transitions. [2022-07-23 06:28:23,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 06:28:23,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2022-07-23 06:28:23,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:23,010 INFO L225 Difference]: With dead ends: 165 [2022-07-23 06:28:23,011 INFO L226 Difference]: Without dead ends: 165 [2022-07-23 06:28:23,011 INFO L412 NwaCegarLoop]: 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 [2022-07-23 06:28:23,012 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 5 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:23,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 271 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 06:28:23,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-23 06:28:23,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-07-23 06:28:23,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 85 states have (on average 2.023529411764706) internal successors, (172), 160 states have internal predecessors, (172), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:28:23,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 178 transitions. [2022-07-23 06:28:23,027 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 178 transitions. Word has length 6 [2022-07-23 06:28:23,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:23,027 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 178 transitions. [2022-07-23 06:28:23,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-07-23 06:28:23,028 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 178 transitions. [2022-07-23 06:28:23,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 06:28:23,029 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:23,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:23,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:23,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:28:23,239 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:28:23,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:23,240 INFO L85 PathProgramCache]: Analyzing trace with hash 165946077, now seen corresponding path program 1 times [2022-07-23 06:28:23,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:28:23,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [263764902] [2022-07-23 06:28:23,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:23,241 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:28:23,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:28:23,242 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:28:23,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-23 06:28:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:23,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:28:23,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:28:23,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:28:23,376 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:28:23,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [263764902] [2022-07-23 06:28:23,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [263764902] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:28:23,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:28:23,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 06:28:23,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853937471] [2022-07-23 06:28:23,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:28:23,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 06:28:23,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:28:23,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 06:28:23,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:28:23,381 INFO L87 Difference]: Start difference. First operand 165 states and 178 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:28:23,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:23,398 INFO L93 Difference]: Finished difference Result 176 states and 191 transitions. [2022-07-23 06:28:23,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 06:28:23,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-07-23 06:28:23,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:23,402 INFO L225 Difference]: With dead ends: 176 [2022-07-23 06:28:23,402 INFO L226 Difference]: Without dead ends: 176 [2022-07-23 06:28:23,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:28:23,403 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 10 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:23,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 349 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:28:23,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-07-23 06:28:23,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 166. [2022-07-23 06:28:23,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 86 states have (on average 2.011627906976744) internal successors, (173), 161 states have internal predecessors, (173), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:28:23,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 179 transitions. [2022-07-23 06:28:23,414 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 179 transitions. Word has length 14 [2022-07-23 06:28:23,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:23,414 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 179 transitions. [2022-07-23 06:28:23,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:28:23,414 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 179 transitions. [2022-07-23 06:28:23,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-23 06:28:23,415 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:23,415 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:23,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:23,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:28:23,625 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:28:23,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:23,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1886331456, now seen corresponding path program 1 times [2022-07-23 06:28:23,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:28:23,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1344495442] [2022-07-23 06:28:23,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:23,627 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:28:23,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:28:23,628 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:28:23,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-23 06:28:23,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:23,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 06:28:23,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:23,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:28:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:28:23,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:28:23,794 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:28:23,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1344495442] [2022-07-23 06:28:23,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1344495442] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:28:23,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:28:23,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:28:23,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190647180] [2022-07-23 06:28:23,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:28:23,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 06:28:23,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:28:23,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 06:28:23,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:28:23,797 INFO L87 Difference]: Start difference. First operand 166 states and 179 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:28:24,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:24,366 INFO L93 Difference]: Finished difference Result 166 states and 180 transitions. [2022-07-23 06:28:24,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:28:24,366 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-07-23 06:28:24,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:24,369 INFO L225 Difference]: With dead ends: 166 [2022-07-23 06:28:24,369 INFO L226 Difference]: Without dead ends: 166 [2022-07-23 06:28:24,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:28:24,370 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 20 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:24,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 514 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-23 06:28:24,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-23 06:28:24,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2022-07-23 06:28:24,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 86 states have (on average 2.0) internal successors, (172), 160 states have internal predecessors, (172), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:28:24,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 178 transitions. [2022-07-23 06:28:24,378 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 178 transitions. Word has length 24 [2022-07-23 06:28:24,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:24,378 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 178 transitions. [2022-07-23 06:28:24,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:28:24,379 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 178 transitions. [2022-07-23 06:28:24,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-23 06:28:24,379 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:24,380 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:24,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:24,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:28:24,590 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:28:24,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:24,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1886331457, now seen corresponding path program 1 times [2022-07-23 06:28:24,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:28:24,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141977039] [2022-07-23 06:28:24,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:24,591 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:28:24,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:28:24,593 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:28:24,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-23 06:28:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:24,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 06:28:24,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:24,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:28:24,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:28:24,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:28:24,828 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:28:24,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141977039] [2022-07-23 06:28:24,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141977039] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:28:24,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:28:24,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:28:24,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343625340] [2022-07-23 06:28:24,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:28:24,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 06:28:24,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:28:24,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 06:28:24,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:28:24,831 INFO L87 Difference]: Start difference. First operand 165 states and 178 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:28:25,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:25,456 INFO L93 Difference]: Finished difference Result 165 states and 179 transitions. [2022-07-23 06:28:25,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:28:25,456 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-07-23 06:28:25,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:25,458 INFO L225 Difference]: With dead ends: 165 [2022-07-23 06:28:25,458 INFO L226 Difference]: Without dead ends: 165 [2022-07-23 06:28:25,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:28:25,459 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 19 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:25,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 538 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-23 06:28:25,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-23 06:28:25,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2022-07-23 06:28:25,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 86 states have (on average 1.9883720930232558) internal successors, (171), 159 states have internal predecessors, (171), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:28:25,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 177 transitions. [2022-07-23 06:28:25,465 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 177 transitions. Word has length 24 [2022-07-23 06:28:25,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:25,466 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 177 transitions. [2022-07-23 06:28:25,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:28:25,466 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 177 transitions. [2022-07-23 06:28:25,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-23 06:28:25,467 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:25,467 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:25,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-07-23 06:28:25,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:28:25,678 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:28:25,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:25,679 INFO L85 PathProgramCache]: Analyzing trace with hash 288330017, now seen corresponding path program 1 times [2022-07-23 06:28:25,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:28:25,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1254622386] [2022-07-23 06:28:25,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:25,680 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:28:25,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:28:25,686 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:28:25,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-23 06:28:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:25,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 06:28:25,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:25,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:28:26,061 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:28:26,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-23 06:28:26,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:28:26,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:28:26,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:28:26,290 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:28:26,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1254622386] [2022-07-23 06:28:26,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1254622386] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:28:26,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:28:26,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2022-07-23 06:28:26,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745375726] [2022-07-23 06:28:26,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:28:26,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 06:28:26,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:28:26,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 06:28:26,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-23 06:28:26,292 INFO L87 Difference]: Start difference. First operand 164 states and 177 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:28:26,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:26,875 INFO L93 Difference]: Finished difference Result 171 states and 186 transitions. [2022-07-23 06:28:26,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 06:28:26,875 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-07-23 06:28:26,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:26,876 INFO L225 Difference]: With dead ends: 171 [2022-07-23 06:28:26,876 INFO L226 Difference]: Without dead ends: 171 [2022-07-23 06:28:26,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-23 06:28:26,877 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 5 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:26,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 668 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 418 Invalid, 0 Unknown, 104 Unchecked, 0.5s Time] [2022-07-23 06:28:26,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-23 06:28:26,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2022-07-23 06:28:26,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 90 states have (on average 1.9666666666666666) internal successors, (177), 163 states have internal predecessors, (177), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:28:26,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 185 transitions. [2022-07-23 06:28:26,884 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 185 transitions. Word has length 26 [2022-07-23 06:28:26,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:26,885 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 185 transitions. [2022-07-23 06:28:26,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:28:26,885 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 185 transitions. [2022-07-23 06:28:26,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-23 06:28:26,886 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:26,886 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:26,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:27,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:28:27,096 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:28:27,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:27,096 INFO L85 PathProgramCache]: Analyzing trace with hash 288330018, now seen corresponding path program 1 times [2022-07-23 06:28:27,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:28:27,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1676999506] [2022-07-23 06:28:27,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:27,097 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:28:27,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:28:27,098 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:28:27,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-23 06:28:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:27,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-23 06:28:27,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:27,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:28:27,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:28:29,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:28:29,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:28:29,495 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:28:29,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-23 06:28:29,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:28:29,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:28:31,835 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:28:31,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1676999506] [2022-07-23 06:28:31,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1676999506] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:28:31,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1653325442] [2022-07-23 06:28:31,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:31,836 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:28:31,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:28:31,841 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:28:31,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-07-23 06:28:32,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:32,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-23 06:28:32,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:32,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:28:32,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:28:32,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:28:32,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:28:32,270 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:28:32,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-23 06:28:32,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:28:32,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:28:32,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1653325442] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:28:32,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:28:32,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-23 06:28:32,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210907771] [2022-07-23 06:28:32,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:28:32,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 06:28:32,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:28:32,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 06:28:32,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=86, Unknown=1, NotChecked=0, Total=110 [2022-07-23 06:28:32,442 INFO L87 Difference]: Start difference. First operand 169 states and 185 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:28:33,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:33,343 INFO L93 Difference]: Finished difference Result 171 states and 186 transitions. [2022-07-23 06:28:33,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 06:28:33,344 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-07-23 06:28:33,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:33,345 INFO L225 Difference]: With dead ends: 171 [2022-07-23 06:28:33,345 INFO L226 Difference]: Without dead ends: 171 [2022-07-23 06:28:33,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=31, Invalid=124, Unknown=1, NotChecked=0, Total=156 [2022-07-23 06:28:33,346 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 3 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:33,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 572 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 537 Invalid, 0 Unknown, 100 Unchecked, 0.8s Time] [2022-07-23 06:28:33,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-23 06:28:33,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2022-07-23 06:28:33,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 90 states have (on average 1.9555555555555555) internal successors, (176), 163 states have internal predecessors, (176), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:28:33,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 184 transitions. [2022-07-23 06:28:33,352 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 184 transitions. Word has length 26 [2022-07-23 06:28:33,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:33,353 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 184 transitions. [2022-07-23 06:28:33,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:28:33,353 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 184 transitions. [2022-07-23 06:28:33,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-23 06:28:33,354 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:33,354 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:33,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:33,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:33,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:28:33,755 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:28:33,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:33,755 INFO L85 PathProgramCache]: Analyzing trace with hash -2087573769, now seen corresponding path program 1 times [2022-07-23 06:28:33,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:28:33,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [277968642] [2022-07-23 06:28:33,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:33,756 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:28:33,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:28:33,757 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:28:33,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-23 06:28:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:33,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 06:28:33,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:33,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:28:33,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:28:33,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:28:33,962 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:28:33,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [277968642] [2022-07-23 06:28:33,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [277968642] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:28:33,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:28:33,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-07-23 06:28:33,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910658251] [2022-07-23 06:28:33,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:28:33,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 06:28:33,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:28:33,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 06:28:33,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:28:33,964 INFO L87 Difference]: Start difference. First operand 169 states and 184 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:28:34,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:34,108 INFO L93 Difference]: Finished difference Result 170 states and 184 transitions. [2022-07-23 06:28:34,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:28:34,109 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-07-23 06:28:34,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:34,110 INFO L225 Difference]: With dead ends: 170 [2022-07-23 06:28:34,110 INFO L226 Difference]: Without dead ends: 170 [2022-07-23 06:28:34,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:28:34,111 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 4 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:34,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 820 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:28:34,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-23 06:28:34,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2022-07-23 06:28:34,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 90 states have (on average 1.9444444444444444) internal successors, (175), 163 states have internal predecessors, (175), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:28:34,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 183 transitions. [2022-07-23 06:28:34,115 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 183 transitions. Word has length 28 [2022-07-23 06:28:34,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:34,115 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 183 transitions. [2022-07-23 06:28:34,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:28:34,116 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 183 transitions. [2022-07-23 06:28:34,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-23 06:28:34,116 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:34,116 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:34,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:34,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:28:34,327 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:28:34,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:34,327 INFO L85 PathProgramCache]: Analyzing trace with hash -295058062, now seen corresponding path program 1 times [2022-07-23 06:28:34,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:28:34,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1149831623] [2022-07-23 06:28:34,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:34,328 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:28:34,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:28:34,329 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:28:34,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-23 06:28:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:34,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 06:28:34,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 06:28:34,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:28:34,501 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-23 06:28:34,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-07-23 06:28:34,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 06:28:34,519 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:28:34,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1149831623] [2022-07-23 06:28:34,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1149831623] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:28:34,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:28:34,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2022-07-23 06:28:34,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718594575] [2022-07-23 06:28:34,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:28:34,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:28:34,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:28:34,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:28:34,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:28:34,520 INFO L87 Difference]: Start difference. First operand 169 states and 183 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:28:34,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:34,742 INFO L93 Difference]: Finished difference Result 174 states and 190 transitions. [2022-07-23 06:28:34,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:28:34,742 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-07-23 06:28:34,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:34,743 INFO L225 Difference]: With dead ends: 174 [2022-07-23 06:28:34,743 INFO L226 Difference]: Without dead ends: 174 [2022-07-23 06:28:34,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:28:34,744 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 9 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:34,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 422 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 06:28:34,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-07-23 06:28:34,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2022-07-23 06:28:34,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 93 states have (on average 1.935483870967742) internal successors, (180), 166 states have internal predecessors, (180), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:28:34,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 188 transitions. [2022-07-23 06:28:34,748 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 188 transitions. Word has length 29 [2022-07-23 06:28:34,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:34,749 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 188 transitions. [2022-07-23 06:28:34,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:28:34,749 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 188 transitions. [2022-07-23 06:28:34,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-23 06:28:34,751 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:34,751 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:34,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:34,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:28:34,964 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:28:34,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:34,964 INFO L85 PathProgramCache]: Analyzing trace with hash -295058061, now seen corresponding path program 1 times [2022-07-23 06:28:34,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:28:34,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784168432] [2022-07-23 06:28:34,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:34,965 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:28:34,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:28:34,966 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:28:34,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-23 06:28:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:35,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 06:28:35,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:35,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:28:35,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:28:35,297 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:28:35,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-07-23 06:28:35,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:28:35,669 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:28:35,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784168432] [2022-07-23 06:28:35,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784168432] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:28:35,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:28:35,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-07-23 06:28:35,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458351474] [2022-07-23 06:28:35,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:28:35,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-23 06:28:35,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:28:35,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 06:28:35,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-23 06:28:35,671 INFO L87 Difference]: Start difference. First operand 172 states and 188 transitions. Second operand has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-23 06:28:36,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:36,472 INFO L93 Difference]: Finished difference Result 179 states and 196 transitions. [2022-07-23 06:28:36,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 06:28:36,473 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2022-07-23 06:28:36,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:36,474 INFO L225 Difference]: With dead ends: 179 [2022-07-23 06:28:36,474 INFO L226 Difference]: Without dead ends: 179 [2022-07-23 06:28:36,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-07-23 06:28:36,474 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 16 mSDsluCounter, 1336 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1505 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:36,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1505 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-23 06:28:36,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-23 06:28:36,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 172. [2022-07-23 06:28:36,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 93 states have (on average 1.924731182795699) internal successors, (179), 166 states have internal predecessors, (179), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:28:36,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 187 transitions. [2022-07-23 06:28:36,479 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 187 transitions. Word has length 29 [2022-07-23 06:28:36,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:36,479 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 187 transitions. [2022-07-23 06:28:36,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-23 06:28:36,479 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 187 transitions. [2022-07-23 06:28:36,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-23 06:28:36,480 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:36,480 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:36,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:36,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:28:36,690 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:28:36,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:36,690 INFO L85 PathProgramCache]: Analyzing trace with hash -556865325, now seen corresponding path program 1 times [2022-07-23 06:28:36,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:28:36,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110017067] [2022-07-23 06:28:36,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:36,691 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:28:36,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:28:36,692 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:28:36,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-23 06:28:36,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:36,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 06:28:36,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:36,829 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:28:36,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:28:36,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:28:36,883 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:28:36,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1110017067] [2022-07-23 06:28:36,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1110017067] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:28:36,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:28:36,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 06:28:36,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431467460] [2022-07-23 06:28:36,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:28:36,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 06:28:36,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:28:36,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 06:28:36,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:28:36,885 INFO L87 Difference]: Start difference. First operand 172 states and 187 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:28:37,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:37,561 INFO L93 Difference]: Finished difference Result 172 states and 187 transitions. [2022-07-23 06:28:37,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 06:28:37,561 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-07-23 06:28:37,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:37,562 INFO L225 Difference]: With dead ends: 172 [2022-07-23 06:28:37,562 INFO L226 Difference]: Without dead ends: 172 [2022-07-23 06:28:37,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-23 06:28:37,563 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 22 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:37,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 586 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-23 06:28:37,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-07-23 06:28:37,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2022-07-23 06:28:37,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 93 states have (on average 1.913978494623656) internal successors, (178), 165 states have internal predecessors, (178), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:28:37,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 186 transitions. [2022-07-23 06:28:37,567 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 186 transitions. Word has length 30 [2022-07-23 06:28:37,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:37,568 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 186 transitions. [2022-07-23 06:28:37,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:28:37,568 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 186 transitions. [2022-07-23 06:28:37,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-23 06:28:37,568 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:37,569 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:37,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:37,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:28:37,781 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:28:37,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:37,782 INFO L85 PathProgramCache]: Analyzing trace with hash -556865324, now seen corresponding path program 1 times [2022-07-23 06:28:37,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:28:37,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [272763862] [2022-07-23 06:28:37,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:37,783 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:28:37,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:28:37,784 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:28:37,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-23 06:28:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:37,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 06:28:37,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:37,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:28:38,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:28:38,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:28:38,035 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:28:38,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [272763862] [2022-07-23 06:28:38,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [272763862] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:28:38,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:28:38,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 06:28:38,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369409174] [2022-07-23 06:28:38,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:28:38,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 06:28:38,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:28:38,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 06:28:38,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:28:38,036 INFO L87 Difference]: Start difference. First operand 171 states and 186 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:28:38,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:38,672 INFO L93 Difference]: Finished difference Result 170 states and 185 transitions. [2022-07-23 06:28:38,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 06:28:38,672 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-07-23 06:28:38,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:38,673 INFO L225 Difference]: With dead ends: 170 [2022-07-23 06:28:38,673 INFO L226 Difference]: Without dead ends: 170 [2022-07-23 06:28:38,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-23 06:28:38,675 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 20 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:38,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 616 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-23 06:28:38,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-23 06:28:38,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-07-23 06:28:38,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 93 states have (on average 1.903225806451613) internal successors, (177), 164 states have internal predecessors, (177), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:28:38,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 185 transitions. [2022-07-23 06:28:38,679 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 185 transitions. Word has length 30 [2022-07-23 06:28:38,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:38,679 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 185 transitions. [2022-07-23 06:28:38,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:28:38,680 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 185 transitions. [2022-07-23 06:28:38,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-23 06:28:38,680 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:38,680 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:38,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:38,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:28:38,890 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:28:38,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:38,890 INFO L85 PathProgramCache]: Analyzing trace with hash 311753782, now seen corresponding path program 1 times [2022-07-23 06:28:38,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:28:38,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [537453584] [2022-07-23 06:28:38,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:38,891 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:28:38,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:28:38,892 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:28:38,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-23 06:28:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:39,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 06:28:39,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:39,060 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 06:28:39,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:28:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-23 06:28:39,111 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:28:39,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [537453584] [2022-07-23 06:28:39,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [537453584] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:28:39,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:28:39,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-07-23 06:28:39,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405669831] [2022-07-23 06:28:39,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:28:39,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 06:28:39,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:28:39,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 06:28:39,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:28:39,113 INFO L87 Difference]: Start difference. First operand 170 states and 185 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-23 06:28:39,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:39,134 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2022-07-23 06:28:39,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:28:39,136 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2022-07-23 06:28:39,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:39,137 INFO L225 Difference]: With dead ends: 158 [2022-07-23 06:28:39,137 INFO L226 Difference]: Without dead ends: 158 [2022-07-23 06:28:39,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:28:39,138 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 147 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:39,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 366 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:28:39,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-07-23 06:28:39,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2022-07-23 06:28:39,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 86 states have (on average 1.8953488372093024) internal successors, (163), 153 states have internal predecessors, (163), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:28:39,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 169 transitions. [2022-07-23 06:28:39,142 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 169 transitions. Word has length 41 [2022-07-23 06:28:39,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:39,142 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 169 transitions. [2022-07-23 06:28:39,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-23 06:28:39,142 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 169 transitions. [2022-07-23 06:28:39,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-23 06:28:39,143 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:39,143 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:39,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:39,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:28:39,354 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:28:39,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:39,354 INFO L85 PathProgramCache]: Analyzing trace with hash -670127466, now seen corresponding path program 1 times [2022-07-23 06:28:39,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:28:39,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [392795852] [2022-07-23 06:28:39,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:39,355 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:28:39,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:28:39,356 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:28:39,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-23 06:28:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:39,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-23 06:28:39,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:39,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:28:39,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 06:28:39,729 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:28:39,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-23 06:28:39,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 06:28:39,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:28:39,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:28:40,020 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-23 06:28:40,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-23 06:28:40,052 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:28:40,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:28:40,304 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:28:40,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [392795852] [2022-07-23 06:28:40,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [392795852] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:28:40,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1063831075] [2022-07-23 06:28:40,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:40,305 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:28:40,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:28:40,308 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:28:40,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-07-23 06:28:40,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:40,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-23 06:28:40,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:40,647 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-23 06:28:40,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-23 06:28:40,689 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-23 06:28:40,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 06:28:40,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:28:40,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:28:40,773 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-23 06:28:40,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 31 [2022-07-23 06:28:40,865 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-23 06:28:40,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2022-07-23 06:28:41,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:28:41,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:28:41,096 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-23 06:28:41,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 40 [2022-07-23 06:28:41,474 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-23 06:28:41,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2022-07-23 06:28:41,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:28:41,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:28:41,581 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-23 06:28:41,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 40 [2022-07-23 06:28:41,698 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-23 06:28:41,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:28:41,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1063831075] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:28:41,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:28:41,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2022-07-23 06:28:41,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243148495] [2022-07-23 06:28:41,778 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:28:41,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-23 06:28:41,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:28:41,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-23 06:28:41,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-07-23 06:28:41,779 INFO L87 Difference]: Start difference. First operand 158 states and 169 transitions. Second operand has 20 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 06:28:48,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:28:48,993 INFO L93 Difference]: Finished difference Result 165 states and 175 transitions. [2022-07-23 06:28:48,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-23 06:28:48,993 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2022-07-23 06:28:48,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:28:48,994 INFO L225 Difference]: With dead ends: 165 [2022-07-23 06:28:48,994 INFO L226 Difference]: Without dead ends: 165 [2022-07-23 06:28:48,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2022-07-23 06:28:48,995 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 15 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 495 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 06:28:48,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 1006 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 406 Invalid, 0 Unknown, 495 Unchecked, 0.6s Time] [2022-07-23 06:28:48,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-23 06:28:48,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-07-23 06:28:48,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 93 states have (on average 1.8172043010752688) internal successors, (169), 159 states have internal predecessors, (169), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:28:48,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 175 transitions. [2022-07-23 06:28:48,999 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 175 transitions. Word has length 43 [2022-07-23 06:28:49,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:28:49,000 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 175 transitions. [2022-07-23 06:28:49,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 06:28:49,000 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 175 transitions. [2022-07-23 06:28:49,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-23 06:28:49,001 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:28:49,001 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:28:49,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2022-07-23 06:28:49,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-23 06:28:49,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:28:49,406 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:28:49,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:28:49,406 INFO L85 PathProgramCache]: Analyzing trace with hash -670127465, now seen corresponding path program 1 times [2022-07-23 06:28:49,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:28:49,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1917533664] [2022-07-23 06:28:49,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:49,406 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:28:49,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:28:49,408 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:28:49,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-23 06:28:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:49,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-23 06:28:49,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:49,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:28:49,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:28:49,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 06:28:49,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 06:28:51,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:28:51,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:28:51,903 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:28:51,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-23 06:28:51,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 06:28:54,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:28:54,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:28:54,297 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:28:54,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-23 06:28:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:28:54,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:28:54,576 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:28:54,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1917533664] [2022-07-23 06:28:54,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1917533664] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:28:54,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1407183397] [2022-07-23 06:28:54,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:28:54,577 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:28:54,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:28:54,579 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:28:54,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-07-23 06:28:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:28:54,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-23 06:28:54,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:28:54,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:28:54,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 06:28:55,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:28:55,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:28:55,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 06:28:57,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:28:57,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:28:57,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 06:28:57,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:28:57,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:28:57,637 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-23 06:28:57,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:29:07,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1407183397] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:29:07,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:29:07,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-07-23 06:29:07,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229840898] [2022-07-23 06:29:07,823 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:29:07,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-23 06:29:07,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:29:07,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-23 06:29:07,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=429, Unknown=8, NotChecked=0, Total=506 [2022-07-23 06:29:07,825 INFO L87 Difference]: Start difference. First operand 165 states and 175 transitions. Second operand has 20 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 15 states have internal predecessors, (60), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 06:29:14,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:29:14,993 INFO L93 Difference]: Finished difference Result 164 states and 174 transitions. [2022-07-23 06:29:14,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 06:29:14,994 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 15 states have internal predecessors, (60), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2022-07-23 06:29:14,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:29:14,995 INFO L225 Difference]: With dead ends: 164 [2022-07-23 06:29:14,995 INFO L226 Difference]: Without dead ends: 164 [2022-07-23 06:29:14,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=112, Invalid=689, Unknown=11, NotChecked=0, Total=812 [2022-07-23 06:29:14,996 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 21 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 532 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-23 06:29:14,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1216 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 501 Invalid, 0 Unknown, 532 Unchecked, 0.9s Time] [2022-07-23 06:29:14,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-07-23 06:29:14,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-07-23 06:29:15,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 93 states have (on average 1.8064516129032258) internal successors, (168), 158 states have internal predecessors, (168), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:29:15,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 174 transitions. [2022-07-23 06:29:15,001 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 174 transitions. Word has length 43 [2022-07-23 06:29:15,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:29:15,001 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 174 transitions. [2022-07-23 06:29:15,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 15 states have internal predecessors, (60), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 06:29:15,002 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 174 transitions. [2022-07-23 06:29:15,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-23 06:29:15,002 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:29:15,002 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:29:15,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-07-23 06:29:15,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-07-23 06:29:15,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:29:15,411 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:29:15,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:29:15,411 INFO L85 PathProgramCache]: Analyzing trace with hash -759331621, now seen corresponding path program 1 times [2022-07-23 06:29:15,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:29:15,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1720631685] [2022-07-23 06:29:15,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:15,412 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:29:15,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:29:15,413 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:29:15,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-23 06:29:15,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:15,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-23 06:29:15,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:15,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:29:15,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-07-23 06:29:16,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:16,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-23 06:29:16,272 INFO L356 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2022-07-23 06:29:16,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2022-07-23 06:29:16,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-07-23 06:29:16,394 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:29:16,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:29:16,547 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:29:16,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1720631685] [2022-07-23 06:29:16,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1720631685] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:29:16,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1639803420] [2022-07-23 06:29:16,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:16,547 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:29:16,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:29:16,552 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:29:16,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-07-23 06:29:16,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:16,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-23 06:29:16,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:16,966 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:29:17,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-07-23 06:29:17,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:17,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-23 06:29:17,552 INFO L356 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2022-07-23 06:29:17,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2022-07-23 06:29:17,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-07-23 06:29:17,712 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:29:17,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:29:17,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1639803420] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:29:17,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:29:17,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2022-07-23 06:29:17,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6196551] [2022-07-23 06:29:17,854 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:29:17,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-23 06:29:17,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:29:17,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-23 06:29:17,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=862, Unknown=3, NotChecked=0, Total=992 [2022-07-23 06:29:17,855 INFO L87 Difference]: Start difference. First operand 164 states and 174 transitions. Second operand has 30 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-23 06:29:19,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:29:19,800 INFO L93 Difference]: Finished difference Result 287 states and 307 transitions. [2022-07-23 06:29:19,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-23 06:29:19,800 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2022-07-23 06:29:19,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:29:19,801 INFO L225 Difference]: With dead ends: 287 [2022-07-23 06:29:19,801 INFO L226 Difference]: Without dead ends: 287 [2022-07-23 06:29:19,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 67 SyntacticMatches, 9 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=238, Invalid=1476, Unknown=8, NotChecked=0, Total=1722 [2022-07-23 06:29:19,803 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 160 mSDsluCounter, 1287 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1370 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-23 06:29:19,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 1370 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1118 Invalid, 0 Unknown, 190 Unchecked, 1.5s Time] [2022-07-23 06:29:19,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-07-23 06:29:19,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 171. [2022-07-23 06:29:19,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 100 states have (on average 1.85) internal successors, (185), 165 states have internal predecessors, (185), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:29:19,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 191 transitions. [2022-07-23 06:29:19,807 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 191 transitions. Word has length 46 [2022-07-23 06:29:19,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:29:19,808 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 191 transitions. [2022-07-23 06:29:19,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-23 06:29:19,808 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 191 transitions. [2022-07-23 06:29:19,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-23 06:29:19,809 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:29:19,809 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:29:19,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-23 06:29:20,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-07-23 06:29:20,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 06:29:20,222 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:29:20,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:29:20,222 INFO L85 PathProgramCache]: Analyzing trace with hash -759331620, now seen corresponding path program 1 times [2022-07-23 06:29:20,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:29:20,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [368597337] [2022-07-23 06:29:20,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:20,223 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:29:20,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:29:20,224 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:29:20,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-23 06:29:20,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:20,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-23 06:29:20,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:20,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:29:20,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:29:21,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-07-23 06:29:21,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-23 06:29:21,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:21,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-07-23 06:29:21,540 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-23 06:29:21,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-23 06:29:21,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:21,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-23 06:29:21,564 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-23 06:29:21,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 06:29:21,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-23 06:29:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:29:21,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:29:22,344 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:29:22,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [368597337] [2022-07-23 06:29:22,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [368597337] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:29:22,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1055168217] [2022-07-23 06:29:22,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:22,345 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:29:22,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:29:22,348 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:29:22,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-07-23 06:29:22,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:22,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-23 06:29:22,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:22,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:29:22,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:29:23,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-07-23 06:29:23,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-23 06:29:23,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:23,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-23 06:29:23,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:23,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-23 06:29:23,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:23,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-07-23 06:29:23,960 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-23 06:29:23,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-23 06:29:24,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 06:29:24,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-23 06:29:24,078 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:29:24,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:29:24,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1055168217] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:29:24,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:29:24,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 32 [2022-07-23 06:29:24,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029458685] [2022-07-23 06:29:24,707 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:29:24,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-23 06:29:24,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:29:24,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-23 06:29:24,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1243, Unknown=8, NotChecked=0, Total=1406 [2022-07-23 06:29:24,709 INFO L87 Difference]: Start difference. First operand 171 states and 191 transitions. Second operand has 33 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 27 states have internal predecessors, (71), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-23 06:29:27,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:29:27,360 INFO L93 Difference]: Finished difference Result 320 states and 339 transitions. [2022-07-23 06:29:27,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-23 06:29:27,361 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 27 states have internal predecessors, (71), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2022-07-23 06:29:27,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:29:27,363 INFO L225 Difference]: With dead ends: 320 [2022-07-23 06:29:27,363 INFO L226 Difference]: Without dead ends: 320 [2022-07-23 06:29:27,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=285, Invalid=2151, Unknown=14, NotChecked=0, Total=2450 [2022-07-23 06:29:27,364 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 202 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-23 06:29:27,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 952 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1133 Invalid, 0 Unknown, 141 Unchecked, 1.8s Time] [2022-07-23 06:29:27,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-07-23 06:29:27,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 171. [2022-07-23 06:29:27,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 100 states have (on average 1.83) internal successors, (183), 165 states have internal predecessors, (183), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:29:27,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 189 transitions. [2022-07-23 06:29:27,369 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 189 transitions. Word has length 46 [2022-07-23 06:29:27,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:29:27,369 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 189 transitions. [2022-07-23 06:29:27,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 27 states have internal predecessors, (71), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-23 06:29:27,370 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 189 transitions. [2022-07-23 06:29:27,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-23 06:29:27,370 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:29:27,371 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:29:27,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-23 06:29:27,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-07-23 06:29:27,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 06:29:27,786 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:29:27,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:29:27,786 INFO L85 PathProgramCache]: Analyzing trace with hash -2064445378, now seen corresponding path program 1 times [2022-07-23 06:29:27,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:29:27,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1401614494] [2022-07-23 06:29:27,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:27,787 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:29:27,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:29:27,788 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:29:27,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-23 06:29:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:27,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 06:29:27,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-23 06:29:28,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:29:28,008 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:29:28,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1401614494] [2022-07-23 06:29:28,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1401614494] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:29:28,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:29:28,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 06:29:28,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031412408] [2022-07-23 06:29:28,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:29:28,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:29:28,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:29:28,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:29:28,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:29:28,010 INFO L87 Difference]: Start difference. First operand 171 states and 189 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:29:28,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:29:28,041 INFO L93 Difference]: Finished difference Result 167 states and 177 transitions. [2022-07-23 06:29:28,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:29:28,042 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-07-23 06:29:28,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:29:28,043 INFO L225 Difference]: With dead ends: 167 [2022-07-23 06:29:28,043 INFO L226 Difference]: Without dead ends: 167 [2022-07-23 06:29:28,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:29:28,044 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 145 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:29:28,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 330 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:29:28,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-07-23 06:29:28,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2022-07-23 06:29:28,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 95 states have (on average 1.7894736842105263) internal successors, (170), 160 states have internal predecessors, (170), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:29:28,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 176 transitions. [2022-07-23 06:29:28,048 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 176 transitions. Word has length 47 [2022-07-23 06:29:28,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:29:28,048 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 176 transitions. [2022-07-23 06:29:28,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:29:28,048 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 176 transitions. [2022-07-23 06:29:28,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-23 06:29:28,049 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:29:28,049 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-07-23 06:29:28,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-23 06:29:28,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:29:28,261 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:29:28,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:29:28,261 INFO L85 PathProgramCache]: Analyzing trace with hash 344455491, now seen corresponding path program 1 times [2022-07-23 06:29:28,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:29:28,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296477780] [2022-07-23 06:29:28,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:28,262 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:29:28,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:29:28,263 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:29:28,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-23 06:29:28,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:28,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 06:29:28,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:28,492 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-23 06:29:28,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:29:29,014 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-23 06:29:29,014 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:29:29,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296477780] [2022-07-23 06:29:29,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296477780] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:29:29,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:29:29,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-23 06:29:29,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173964719] [2022-07-23 06:29:29,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:29:29,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 06:29:29,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:29:29,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 06:29:29,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:29:29,015 INFO L87 Difference]: Start difference. First operand 166 states and 176 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-23 06:29:29,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:29:29,055 INFO L93 Difference]: Finished difference Result 163 states and 172 transitions. [2022-07-23 06:29:29,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:29:29,056 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 49 [2022-07-23 06:29:29,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:29:29,057 INFO L225 Difference]: With dead ends: 163 [2022-07-23 06:29:29,057 INFO L226 Difference]: Without dead ends: 163 [2022-07-23 06:29:29,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-23 06:29:29,057 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 534 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:29:29,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 364 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:29:29,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-07-23 06:29:29,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-07-23 06:29:29,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 94 states have (on average 1.7659574468085106) internal successors, (166), 157 states have internal predecessors, (166), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:29:29,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 172 transitions. [2022-07-23 06:29:29,062 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 172 transitions. Word has length 49 [2022-07-23 06:29:29,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:29:29,062 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 172 transitions. [2022-07-23 06:29:29,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-23 06:29:29,062 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 172 transitions. [2022-07-23 06:29:29,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-23 06:29:29,063 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:29:29,063 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:29:29,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-23 06:29:29,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:29:29,271 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:29:29,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:29:29,272 INFO L85 PathProgramCache]: Analyzing trace with hash 2088184022, now seen corresponding path program 1 times [2022-07-23 06:29:29,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:29:29,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1208808154] [2022-07-23 06:29:29,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:29,272 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:29:29,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:29:29,273 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:29:29,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-23 06:29:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:29,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 06:29:29,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:29,496 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-23 06:29:29,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:29:29,497 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:29:29,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1208808154] [2022-07-23 06:29:29,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1208808154] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:29:29,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:29:29,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 06:29:29,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527191028] [2022-07-23 06:29:29,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:29:29,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:29:29,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:29:29,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:29:29,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:29:29,500 INFO L87 Difference]: Start difference. First operand 163 states and 172 transitions. Second operand has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-23 06:29:29,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:29:29,776 INFO L93 Difference]: Finished difference Result 180 states and 190 transitions. [2022-07-23 06:29:29,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:29:29,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-07-23 06:29:29,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:29:29,777 INFO L225 Difference]: With dead ends: 180 [2022-07-23 06:29:29,777 INFO L226 Difference]: Without dead ends: 180 [2022-07-23 06:29:29,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:29:29,778 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 126 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:29:29,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 223 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 06:29:29,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-07-23 06:29:29,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 162. [2022-07-23 06:29:29,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 94 states have (on average 1.7553191489361701) internal successors, (165), 156 states have internal predecessors, (165), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:29:29,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 171 transitions. [2022-07-23 06:29:29,781 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 171 transitions. Word has length 50 [2022-07-23 06:29:29,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:29:29,782 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 171 transitions. [2022-07-23 06:29:29,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-23 06:29:29,782 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 171 transitions. [2022-07-23 06:29:29,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-23 06:29:29,782 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:29:29,782 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:29:29,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-23 06:29:29,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:29:29,994 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:29:29,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:29:29,994 INFO L85 PathProgramCache]: Analyzing trace with hash 2088184023, now seen corresponding path program 1 times [2022-07-23 06:29:29,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:29:29,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1712742112] [2022-07-23 06:29:29,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:29,995 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:29:29,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:29:29,996 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:29:29,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-23 06:29:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:30,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 06:29:30,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-23 06:29:30,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:29:30,287 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:29:30,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1712742112] [2022-07-23 06:29:30,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1712742112] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:29:30,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:29:30,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 06:29:30,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936536995] [2022-07-23 06:29:30,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:29:30,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:29:30,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:29:30,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:29:30,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:29:30,289 INFO L87 Difference]: Start difference. First operand 162 states and 171 transitions. Second operand has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-23 06:29:30,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:29:30,711 INFO L93 Difference]: Finished difference Result 161 states and 170 transitions. [2022-07-23 06:29:30,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:29:30,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-07-23 06:29:30,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:29:30,712 INFO L225 Difference]: With dead ends: 161 [2022-07-23 06:29:30,712 INFO L226 Difference]: Without dead ends: 161 [2022-07-23 06:29:30,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:29:30,713 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 129 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 06:29:30,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 221 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 06:29:30,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-23 06:29:30,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-07-23 06:29:30,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 94 states have (on average 1.7446808510638299) internal successors, (164), 155 states have internal predecessors, (164), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:29:30,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 170 transitions. [2022-07-23 06:29:30,717 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 170 transitions. Word has length 50 [2022-07-23 06:29:30,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:29:30,717 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 170 transitions. [2022-07-23 06:29:30,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-23 06:29:30,718 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 170 transitions. [2022-07-23 06:29:30,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-23 06:29:30,718 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:29:30,718 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:29:30,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-23 06:29:30,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:29:30,923 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:29:30,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:29:30,924 INFO L85 PathProgramCache]: Analyzing trace with hash 2088184470, now seen corresponding path program 1 times [2022-07-23 06:29:30,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:29:30,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745217638] [2022-07-23 06:29:30,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:30,924 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:29:30,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:29:30,926 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:29:30,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-23 06:29:31,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:31,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-23 06:29:31,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:31,183 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-23 06:29:31,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:29:31,184 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:29:31,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745217638] [2022-07-23 06:29:31,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745217638] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:29:31,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:29:31,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:29:31,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426376263] [2022-07-23 06:29:31,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:29:31,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 06:29:31,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:29:31,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 06:29:31,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:29:31,185 INFO L87 Difference]: Start difference. First operand 161 states and 170 transitions. Second operand has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-23 06:29:31,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:29:31,412 INFO L93 Difference]: Finished difference Result 173 states and 183 transitions. [2022-07-23 06:29:31,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 06:29:31,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-07-23 06:29:31,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:29:31,414 INFO L225 Difference]: With dead ends: 173 [2022-07-23 06:29:31,414 INFO L226 Difference]: Without dead ends: 173 [2022-07-23 06:29:31,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:29:31,414 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 118 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:29:31,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 125 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 06:29:31,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-07-23 06:29:31,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 155. [2022-07-23 06:29:31,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 94 states have (on average 1.6808510638297873) internal successors, (158), 149 states have internal predecessors, (158), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:29:31,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 164 transitions. [2022-07-23 06:29:31,418 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 164 transitions. Word has length 50 [2022-07-23 06:29:31,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:29:31,418 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 164 transitions. [2022-07-23 06:29:31,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-23 06:29:31,419 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 164 transitions. [2022-07-23 06:29:31,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-23 06:29:31,419 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:29:31,419 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:29:31,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-23 06:29:31,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:29:31,627 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:29:31,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:29:31,628 INFO L85 PathProgramCache]: Analyzing trace with hash 2088184471, now seen corresponding path program 1 times [2022-07-23 06:29:31,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:29:31,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1810487054] [2022-07-23 06:29:31,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:31,629 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:29:31,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:29:31,631 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:29:31,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-23 06:29:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:31,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 06:29:31,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-23 06:29:31,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:29:31,934 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:29:31,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1810487054] [2022-07-23 06:29:31,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1810487054] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:29:31,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:29:31,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 06:29:31,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823223811] [2022-07-23 06:29:31,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:29:31,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:29:31,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:29:31,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:29:31,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:29:31,936 INFO L87 Difference]: Start difference. First operand 155 states and 164 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:29:32,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:29:32,183 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2022-07-23 06:29:32,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:29:32,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-07-23 06:29:32,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:29:32,185 INFO L225 Difference]: With dead ends: 149 [2022-07-23 06:29:32,185 INFO L226 Difference]: Without dead ends: 149 [2022-07-23 06:29:32,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:29:32,185 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 246 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:29:32,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 152 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 06:29:32,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-23 06:29:32,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-07-23 06:29:32,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 94 states have (on average 1.6170212765957446) internal successors, (152), 143 states have internal predecessors, (152), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:29:32,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 158 transitions. [2022-07-23 06:29:32,194 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 158 transitions. Word has length 50 [2022-07-23 06:29:32,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:29:32,195 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 158 transitions. [2022-07-23 06:29:32,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:29:32,195 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 158 transitions. [2022-07-23 06:29:32,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-23 06:29:32,196 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:29:32,196 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:29:32,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-23 06:29:32,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:29:32,399 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:29:32,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:29:32,400 INFO L85 PathProgramCache]: Analyzing trace with hash 309195281, now seen corresponding path program 1 times [2022-07-23 06:29:32,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:29:32,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2112233672] [2022-07-23 06:29:32,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:32,400 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:29:32,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:29:32,401 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:29:32,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-23 06:29:32,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:32,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 06:29:32,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:32,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:29:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 06:29:32,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:29:32,673 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:29:32,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2112233672] [2022-07-23 06:29:32,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2112233672] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:29:32,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:29:32,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:29:32,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125197529] [2022-07-23 06:29:32,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:29:32,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 06:29:32,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:29:32,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 06:29:32,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:29:32,674 INFO L87 Difference]: Start difference. First operand 149 states and 158 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-23 06:29:33,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:29:33,101 INFO L93 Difference]: Finished difference Result 161 states and 171 transitions. [2022-07-23 06:29:33,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:29:33,101 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2022-07-23 06:29:33,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:29:33,102 INFO L225 Difference]: With dead ends: 161 [2022-07-23 06:29:33,102 INFO L226 Difference]: Without dead ends: 161 [2022-07-23 06:29:33,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:29:33,103 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 107 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 06:29:33,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 319 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 06:29:33,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-23 06:29:33,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 143. [2022-07-23 06:29:33,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 94 states have (on average 1.553191489361702) internal successors, (146), 137 states have internal predecessors, (146), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:29:33,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 152 transitions. [2022-07-23 06:29:33,106 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 152 transitions. Word has length 51 [2022-07-23 06:29:33,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:29:33,106 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 152 transitions. [2022-07-23 06:29:33,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-23 06:29:33,106 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 152 transitions. [2022-07-23 06:29:33,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-23 06:29:33,107 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:29:33,107 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:29:33,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-07-23 06:29:33,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:29:33,319 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:29:33,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:29:33,319 INFO L85 PathProgramCache]: Analyzing trace with hash 309195282, now seen corresponding path program 1 times [2022-07-23 06:29:33,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:29:33,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1569288021] [2022-07-23 06:29:33,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:33,320 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:29:33,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:29:33,321 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:29:33,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-23 06:29:33,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:33,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 06:29:33,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:33,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:29:33,626 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 06:29:33,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:29:33,626 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:29:33,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1569288021] [2022-07-23 06:29:33,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1569288021] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:29:33,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:29:33,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:29:33,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60793112] [2022-07-23 06:29:33,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:29:33,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 06:29:33,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:29:33,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 06:29:33,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:29:33,628 INFO L87 Difference]: Start difference. First operand 143 states and 152 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-23 06:29:34,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:29:34,101 INFO L93 Difference]: Finished difference Result 137 states and 146 transitions. [2022-07-23 06:29:34,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:29:34,102 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2022-07-23 06:29:34,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:29:34,103 INFO L225 Difference]: With dead ends: 137 [2022-07-23 06:29:34,103 INFO L226 Difference]: Without dead ends: 137 [2022-07-23 06:29:34,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:29:34,104 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 105 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 06:29:34,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 330 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-23 06:29:34,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-23 06:29:34,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-07-23 06:29:34,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 94 states have (on average 1.4893617021276595) internal successors, (140), 131 states have internal predecessors, (140), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:29:34,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 146 transitions. [2022-07-23 06:29:34,107 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 146 transitions. Word has length 51 [2022-07-23 06:29:34,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:29:34,108 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 146 transitions. [2022-07-23 06:29:34,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-23 06:29:34,108 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 146 transitions. [2022-07-23 06:29:34,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-23 06:29:34,109 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:29:34,109 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:29:34,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-23 06:29:34,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:29:34,321 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:29:34,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:29:34,321 INFO L85 PathProgramCache]: Analyzing trace with hash 783922964, now seen corresponding path program 1 times [2022-07-23 06:29:34,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:29:34,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [293412618] [2022-07-23 06:29:34,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:34,322 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:29:34,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:29:34,323 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:29:34,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-23 06:29:34,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:34,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-23 06:29:34,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:34,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:34,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:29:34,856 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:29:34,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-23 06:29:34,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 06:29:35,306 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-23 06:29:35,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 41 [2022-07-23 06:29:35,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 06:29:35,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-23 06:29:35,982 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 06:29:35,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2022-07-23 06:29:36,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:36,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 41 [2022-07-23 06:29:36,343 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-23 06:29:36,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 47 [2022-07-23 06:29:36,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-23 06:29:36,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2022-07-23 06:29:37,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:37,107 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-23 06:29:37,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 84 [2022-07-23 06:29:37,201 INFO L356 Elim1Store]: treesize reduction 81, result has 43.0 percent of original size [2022-07-23 06:29:37,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 87 [2022-07-23 06:29:37,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:37,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-23 06:29:37,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 06:29:38,289 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-23 06:29:38,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 58 [2022-07-23 06:29:39,558 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:29:39,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:29:39,991 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:29:39,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [293412618] [2022-07-23 06:29:39,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [293412618] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:29:39,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1690315781] [2022-07-23 06:29:39,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:39,992 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:29:39,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:29:39,993 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:29:39,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-07-23 06:29:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:40,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-23 06:29:40,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:40,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:29:41,217 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:29:41,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-23 06:29:41,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 06:29:41,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-23 06:29:41,820 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 06:29:41,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2022-07-23 06:29:41,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:41,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 29 [2022-07-23 06:29:42,294 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:29:42,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 28 [2022-07-23 06:29:42,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-23 06:29:42,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-23 06:29:42,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:42,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-23 06:29:43,013 INFO L356 Elim1Store]: treesize reduction 66, result has 42.6 percent of original size [2022-07-23 06:29:43,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 69 [2022-07-23 06:29:43,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:43,039 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-23 06:29:43,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 61 [2022-07-23 06:29:43,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 06:29:43,755 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:29:43,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 39 [2022-07-23 06:29:44,407 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:29:44,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:29:44,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1690315781] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:29:44,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:29:44,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2022-07-23 06:29:44,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994319688] [2022-07-23 06:29:44,671 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:29:44,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-23 06:29:44,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:29:44,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-23 06:29:44,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=3509, Unknown=22, NotChecked=0, Total=3782 [2022-07-23 06:29:44,673 INFO L87 Difference]: Start difference. First operand 137 states and 146 transitions. Second operand has 55 states, 50 states have (on average 1.88) internal successors, (94), 45 states have internal predecessors, (94), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-23 06:29:50,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:29:50,355 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2022-07-23 06:29:50,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-23 06:29:50,356 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 50 states have (on average 1.88) internal successors, (94), 45 states have internal predecessors, (94), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2022-07-23 06:29:50,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:29:50,357 INFO L225 Difference]: With dead ends: 144 [2022-07-23 06:29:50,357 INFO L226 Difference]: Without dead ends: 144 [2022-07-23 06:29:50,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2677 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=541, Invalid=7245, Unknown=46, NotChecked=0, Total=7832 [2022-07-23 06:29:50,359 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 32 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 1344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 603 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:29:50,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 1241 Invalid, 1344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 700 Invalid, 0 Unknown, 603 Unchecked, 1.1s Time] [2022-07-23 06:29:50,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-23 06:29:50,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-07-23 06:29:50,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 101 states have (on average 1.4455445544554455) internal successors, (146), 137 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:29:50,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 152 transitions. [2022-07-23 06:29:50,363 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 152 transitions. Word has length 53 [2022-07-23 06:29:50,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:29:50,364 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 152 transitions. [2022-07-23 06:29:50,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 50 states have (on average 1.88) internal successors, (94), 45 states have internal predecessors, (94), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-23 06:29:50,364 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 152 transitions. [2022-07-23 06:29:50,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-23 06:29:50,365 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:29:50,365 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:29:50,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-23 06:29:50,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-07-23 06:29:50,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 06:29:50,776 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:29:50,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:29:50,776 INFO L85 PathProgramCache]: Analyzing trace with hash 783922965, now seen corresponding path program 1 times [2022-07-23 06:29:50,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:29:50,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1561250186] [2022-07-23 06:29:50,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:29:50,777 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:29:50,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:29:50,778 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:29:50,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-23 06:29:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:29:51,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 90 conjunts are in the unsatisfiable core [2022-07-23 06:29:51,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:29:51,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:51,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:29:51,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:29:51,446 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:29:51,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-23 06:29:51,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 06:29:51,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 06:29:51,955 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-23 06:29:51,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 41 [2022-07-23 06:29:51,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:29:52,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 06:29:52,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 06:29:52,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-23 06:29:52,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-23 06:29:52,826 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 06:29:52,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 61 [2022-07-23 06:29:52,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-23 06:29:52,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:52,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-23 06:29:52,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:52,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 42 [2022-07-23 06:29:53,304 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-23 06:29:53,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 55 [2022-07-23 06:29:53,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:53,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 06:29:53,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-07-23 06:29:53,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 06:29:54,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:54,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:54,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:54,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2022-07-23 06:29:54,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:54,141 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-23 06:29:54,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 96 [2022-07-23 06:29:54,215 INFO L356 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2022-07-23 06:29:54,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 42 [2022-07-23 06:29:54,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-23 06:29:55,367 INFO L356 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2022-07-23 06:29:55,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 149 treesize of output 67 [2022-07-23 06:29:55,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:29:55,396 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-23 06:29:55,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-07-23 06:29:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:29:56,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:30:01,940 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:30:01,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1561250186] [2022-07-23 06:30:01,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1561250186] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:30:01,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1386188421] [2022-07-23 06:30:01,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:30:01,940 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:30:01,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:30:01,941 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:30:01,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-07-23 06:30:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:30:02,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-23 06:30:02,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:30:04,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:30:04,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:30:05,689 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:30:05,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-23 06:30:05,719 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:30:05,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-23 06:30:06,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 06:30:06,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 06:30:06,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-23 06:30:06,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-23 06:30:06,805 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 06:30:06,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2022-07-23 06:30:06,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-23 06:30:06,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:30:06,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 34 [2022-07-23 06:30:07,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:30:07,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-23 06:30:07,417 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:30:07,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 40 [2022-07-23 06:30:07,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-23 06:30:07,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 06:30:07,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 06:30:08,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:30:08,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:30:08,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:30:08,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2022-07-23 06:30:08,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:30:08,437 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-23 06:30:08,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 65 [2022-07-23 06:30:08,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:30:08,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-23 06:30:08,478 INFO L356 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-07-23 06:30:08,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2022-07-23 06:30:09,259 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-23 06:30:09,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 49 [2022-07-23 06:30:09,280 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-23 06:30:09,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-07-23 06:30:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:30:09,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:30:14,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1386188421] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:30:14,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:30:14,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2022-07-23 06:30:14,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455748055] [2022-07-23 06:30:14,301 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:30:14,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-23 06:30:14,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:30:14,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-23 06:30:14,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=3520, Unknown=27, NotChecked=0, Total=3782 [2022-07-23 06:30:14,303 INFO L87 Difference]: Start difference. First operand 144 states and 152 transitions. Second operand has 55 states, 50 states have (on average 1.88) internal successors, (94), 45 states have internal predecessors, (94), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-23 06:30:22,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:30:22,751 INFO L93 Difference]: Finished difference Result 143 states and 151 transitions. [2022-07-23 06:30:22,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-23 06:30:22,752 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 50 states have (on average 1.88) internal successors, (94), 45 states have internal predecessors, (94), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2022-07-23 06:30:22,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:30:22,753 INFO L225 Difference]: With dead ends: 143 [2022-07-23 06:30:22,753 INFO L226 Difference]: Without dead ends: 143 [2022-07-23 06:30:22,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2138 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=488, Invalid=6606, Unknown=46, NotChecked=0, Total=7140 [2022-07-23 06:30:22,754 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 47 mSDsluCounter, 1597 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 1706 SdHoareTripleChecker+Invalid, 2018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 875 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-23 06:30:22,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 1706 Invalid, 2018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1101 Invalid, 0 Unknown, 875 Unchecked, 1.9s Time] [2022-07-23 06:30:22,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-23 06:30:22,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-07-23 06:30:22,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 101 states have (on average 1.4356435643564356) internal successors, (145), 136 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:30:22,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 151 transitions. [2022-07-23 06:30:22,758 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 151 transitions. Word has length 53 [2022-07-23 06:30:22,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:30:22,758 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 151 transitions. [2022-07-23 06:30:22,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 50 states have (on average 1.88) internal successors, (94), 45 states have internal predecessors, (94), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-23 06:30:22,758 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 151 transitions. [2022-07-23 06:30:22,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-23 06:30:22,759 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:30:22,759 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:30:22,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-23 06:30:22,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-07-23 06:30:23,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 06:30:23,173 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:30:23,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:30:23,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1730694709, now seen corresponding path program 1 times [2022-07-23 06:30:23,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:30:23,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [163473420] [2022-07-23 06:30:23,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:30:23,174 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:30:23,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:30:23,175 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:30:23,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-23 06:30:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:30:23,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:30:23,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:30:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-23 06:30:23,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:30:23,460 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:30:23,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [163473420] [2022-07-23 06:30:23,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [163473420] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:30:23,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:30:23,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 06:30:23,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105253380] [2022-07-23 06:30:23,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:30:23,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:30:23,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:30:23,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:30:23,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:30:23,461 INFO L87 Difference]: Start difference. First operand 143 states and 151 transitions. Second operand has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:30:23,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:30:23,674 INFO L93 Difference]: Finished difference Result 157 states and 166 transitions. [2022-07-23 06:30:23,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:30:23,674 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-07-23 06:30:23,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:30:23,675 INFO L225 Difference]: With dead ends: 157 [2022-07-23 06:30:23,675 INFO L226 Difference]: Without dead ends: 157 [2022-07-23 06:30:23,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:30:23,676 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 208 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:30:23,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 134 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 06:30:23,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-07-23 06:30:23,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 139. [2022-07-23 06:30:23,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 101 states have (on average 1.396039603960396) internal successors, (141), 132 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:30:23,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 147 transitions. [2022-07-23 06:30:23,683 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 147 transitions. Word has length 55 [2022-07-23 06:30:23,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:30:23,683 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 147 transitions. [2022-07-23 06:30:23,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:30:23,684 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 147 transitions. [2022-07-23 06:30:23,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-23 06:30:23,684 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:30:23,684 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:30:23,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-07-23 06:30:23,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:30:23,896 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr45REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:30:23,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:30:23,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1730694710, now seen corresponding path program 1 times [2022-07-23 06:30:23,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:30:23,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784224711] [2022-07-23 06:30:23,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:30:23,898 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:30:23,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:30:23,899 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:30:23,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-23 06:30:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:30:24,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 06:30:24,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:30:24,296 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-23 06:30:24,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:30:24,296 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:30:24,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784224711] [2022-07-23 06:30:24,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784224711] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:30:24,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:30:24,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 06:30:24,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825627916] [2022-07-23 06:30:24,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:30:24,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:30:24,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:30:24,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:30:24,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:30:24,297 INFO L87 Difference]: Start difference. First operand 139 states and 147 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:30:24,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:30:24,560 INFO L93 Difference]: Finished difference Result 135 states and 143 transitions. [2022-07-23 06:30:24,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:30:24,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-07-23 06:30:24,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:30:24,561 INFO L225 Difference]: With dead ends: 135 [2022-07-23 06:30:24,561 INFO L226 Difference]: Without dead ends: 135 [2022-07-23 06:30:24,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:30:24,562 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 188 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:30:24,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 136 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 06:30:24,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-23 06:30:24,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-07-23 06:30:24,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 101 states have (on average 1.3564356435643565) internal successors, (137), 128 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:30:24,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 143 transitions. [2022-07-23 06:30:24,565 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 143 transitions. Word has length 55 [2022-07-23 06:30:24,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:30:24,565 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 143 transitions. [2022-07-23 06:30:24,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:30:24,566 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 143 transitions. [2022-07-23 06:30:24,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-23 06:30:24,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:30:24,566 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:30:24,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-07-23 06:30:24,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:30:24,775 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-07-23 06:30:24,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:30:24,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1045275033, now seen corresponding path program 1 times [2022-07-23 06:30:24,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:30:24,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1350456671] [2022-07-23 06:30:24,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:30:24,776 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:30:24,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:30:24,777 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:30:24,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-07-23 06:30:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:30:25,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-23 06:30:25,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:30:25,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:30:25,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:30:25,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 06:30:25,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 06:30:27,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:30:27,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:30:27,501 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:30:27,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-23 06:30:27,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 06:30:29,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:30:29,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:30:30,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-23 06:30:30,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-23 06:30:30,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 06:30:32,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:30:32,503 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:30:32,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-23 06:30:32,544 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:30:32,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-23 06:30:32,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 06:30:32,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:30:32,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-23 06:30:33,325 INFO L356 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2022-07-23 06:30:33,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-23 06:30:33,561 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 06:30:33,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2022-07-23 06:30:33,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:30:33,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2022-07-23 06:30:33,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:30:33,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2022-07-23 06:30:33,772 INFO L356 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2022-07-23 06:30:33,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2022-07-23 06:30:33,793 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:30:33,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-07-23 06:30:34,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 06:30:34,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-07-23 06:30:34,994 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:30:34,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:30:38,545 INFO L356 Elim1Store]: treesize reduction 5, result has 93.9 percent of original size [2022-07-23 06:30:38,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 251 treesize of output 250 [2022-07-23 06:30:39,221 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:30:39,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1350456671] [2022-07-23 06:30:39,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1350456671] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:30:39,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1689880767] [2022-07-23 06:30:39,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:30:39,222 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:30:39,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:30:39,223 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:30:39,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-07-23 06:30:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:30:39,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-23 06:30:39,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:30:39,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:30:39,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 06:30:40,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:30:40,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:30:40,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 06:30:42,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:30:42,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:30:42,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-23 06:30:43,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 06:30:45,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:30:46,174 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:30:46,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-23 06:30:46,211 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:30:46,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-23 06:30:46,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 06:30:46,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 06:30:48,304 INFO L356 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2022-07-23 06:30:48,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 38 [2022-07-23 06:30:48,950 INFO L356 Elim1Store]: treesize reduction 30, result has 63.4 percent of original size [2022-07-23 06:30:48,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 98 [2022-07-23 06:30:49,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 06:30:49,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 06:30:49,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-07-23 06:30:49,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 06:30:49,782 INFO L356 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-07-23 06:30:49,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 60 [2022-07-23 06:30:49,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 06:30:49,947 INFO L356 Elim1Store]: treesize reduction 46, result has 41.8 percent of original size [2022-07-23 06:30:49,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 62 [2022-07-23 06:30:49,975 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:30:49,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-07-23 06:30:52,007 INFO L356 Elim1Store]: treesize reduction 4, result has 89.2 percent of original size [2022-07-23 06:30:52,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 98 [2022-07-23 06:30:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:30:54,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:31:18,924 INFO L356 Elim1Store]: treesize reduction 19, result has 72.5 percent of original size [2022-07-23 06:31:18,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 120 treesize of output 93 [2022-07-23 06:31:19,043 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:31:19,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 188 treesize of output 224 [2022-07-23 06:31:19,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 166 [2022-07-23 06:31:19,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2022-07-23 06:31:20,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 281 treesize of output 277 [2022-07-23 06:31:20,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 281 treesize of output 277 [2022-07-23 06:31:21,396 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:31:21,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 335 treesize of output 337 [2022-07-23 06:31:23,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-23 06:31:23,451 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:31:23,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 47 [2022-07-23 06:31:23,624 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:31:23,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 479 treesize of output 477 [2022-07-23 06:31:37,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2022-07-23 06:31:38,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2022-07-23 06:31:38,729 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:31:38,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 60 [2022-07-23 06:31:39,125 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:31:39,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 729 treesize of output 695 [2022-07-23 06:31:50,158 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:31:50,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 452 treesize of output 444 [2022-07-23 06:31:57,630 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:31:57,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 695 treesize of output 655