./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 f4b24e32 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-?-f4b24e3 [2022-07-14 06:50:42,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:50:42,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:50:42,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:50:42,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:50:42,361 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:50:42,363 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:50:42,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:50:42,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:50:42,371 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:50:42,372 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:50:42,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:50:42,375 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:50:42,377 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:50:42,378 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:50:42,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:50:42,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:50:42,383 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:50:42,384 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:50:42,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:50:42,391 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:50:42,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:50:42,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:50:42,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:50:42,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:50:42,402 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:50:42,402 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:50:42,403 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:50:42,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:50:42,404 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:50:42,405 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:50:42,406 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:50:42,407 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:50:42,408 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:50:42,409 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:50:42,410 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:50:42,411 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:50:42,411 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:50:42,412 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:50:42,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:50:42,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:50:42,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:50:42,416 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 06:50:42,444 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:50:42,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:50:42,445 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:50:42,445 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:50:42,446 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:50:42,446 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:50:42,446 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:50:42,447 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:50:42,447 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:50:42,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:50:42,448 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:50:42,448 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:50:42,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:50:42,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:50:42,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:50:42,449 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:50:42,449 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:50:42,449 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:50:42,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:50:42,450 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:50:42,450 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:50:42,450 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:50:42,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:50:42,450 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:50:42,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:50:42,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:50:42,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:50:42,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:50:42,452 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 06:50:42,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 06:50:42,452 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b81f923e96224472f8219a473f794261ff02356a47c6b09b527f0fc600725a8 [2022-07-14 06:50:42,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:50:42,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:50:42,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:50:42,672 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:50:42,673 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:50:42,674 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2c_insert_unequal.i [2022-07-14 06:50:42,751 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e632d5f7b/194bc2b2f29441039846a6c2600d2a0e/FLAG4f047a94b [2022-07-14 06:50:43,156 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:50:43,156 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_insert_unequal.i [2022-07-14 06:50:43,167 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e632d5f7b/194bc2b2f29441039846a6c2600d2a0e/FLAG4f047a94b [2022-07-14 06:50:43,180 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e632d5f7b/194bc2b2f29441039846a6c2600d2a0e [2022-07-14 06:50:43,184 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:50:43,185 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:50:43,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:50:43,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:50:43,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:50:43,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:50:43" (1/1) ... [2022-07-14 06:50:43,193 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16ff924a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:50:43, skipping insertion in model container [2022-07-14 06:50:43,194 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:50:43" (1/1) ... [2022-07-14 06:50:43,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:50:43,242 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:50:43,522 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] [2022-07-14 06:50:43,525 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:50:43,536 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 06:50:43,579 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] [2022-07-14 06:50:43,580 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:50:43,604 INFO L208 MainTranslator]: Completed translation [2022-07-14 06:50:43,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:50:43 WrapperNode [2022-07-14 06:50:43,606 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:50:43,608 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 06:50:43,608 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 06:50:43,608 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 06:50:43,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:50:43" (1/1) ... [2022-07-14 06:50:43,645 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:50:43" (1/1) ... [2022-07-14 06:50:43,679 INFO L137 Inliner]: procedures = 127, calls = 58, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 191 [2022-07-14 06:50:43,679 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 06:50:43,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 06:50:43,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 06:50:43,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 06:50:43,687 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:50:43" (1/1) ... [2022-07-14 06:50:43,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:50:43" (1/1) ... [2022-07-14 06:50:43,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:50:43" (1/1) ... [2022-07-14 06:50:43,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:50:43" (1/1) ... [2022-07-14 06:50:43,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:50:43" (1/1) ... [2022-07-14 06:50:43,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:50:43" (1/1) ... [2022-07-14 06:50:43,738 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:50:43" (1/1) ... [2022-07-14 06:50:43,745 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 06:50:43,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 06:50:43,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 06:50:43,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 06:50:43,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:50:43" (1/1) ... [2022-07-14 06:50:43,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:50:43,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:50:43,780 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) [2022-07-14 06:50:43,789 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 [2022-07-14 06:50:43,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-14 06:50:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-14 06:50:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-07-14 06:50:43,821 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-07-14 06:50:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-14 06:50:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-14 06:50:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-14 06:50:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-14 06:50:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-14 06:50:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 06:50:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-14 06:50:43,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-14 06:50:43,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 06:50:43,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 06:50:43,916 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 06:50:43,918 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 06:50:44,348 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 06:50:44,355 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 06:50:44,355 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-14 06:50:44,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:50:44 BoogieIcfgContainer [2022-07-14 06:50:44,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 06:50:44,359 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 06:50:44,359 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 06:50:44,362 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 06:50:44,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 06:50:43" (1/3) ... [2022-07-14 06:50:44,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ad4f1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:50:44, skipping insertion in model container [2022-07-14 06:50:44,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:50:43" (2/3) ... [2022-07-14 06:50:44,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ad4f1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:50:44, skipping insertion in model container [2022-07-14 06:50:44,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:50:44" (3/3) ... [2022-07-14 06:50:44,365 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_insert_unequal.i [2022-07-14 06:50:44,377 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 06:50:44,378 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 82 error locations. [2022-07-14 06:50:44,439 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 06:50:44,448 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@26d7648, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@51804076 [2022-07-14 06:50:44,448 INFO L358 AbstractCegarLoop]: Starting to check reachability of 82 error locations. [2022-07-14 06:50:44,453 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) [2022-07-14 06:50:44,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 06:50:44,469 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:50:44,470 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 06:50:44,471 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)] === [2022-07-14 06:50:44,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:50:44,477 INFO L85 PathProgramCache]: Analyzing trace with hash 897735090, now seen corresponding path program 1 times [2022-07-14 06:50:44,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:50:44,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360831357] [2022-07-14 06:50:44,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:50:44,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:50:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:44,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:50:44,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:50:44,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360831357] [2022-07-14 06:50:44,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360831357] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:50:44,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:50:44,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:50:44,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364124232] [2022-07-14 06:50:44,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:50:44,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:50:44,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:50:44,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:50:44,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:50:44,706 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) [2022-07-14 06:50:44,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:50:44,934 INFO L93 Difference]: Finished difference Result 171 states and 185 transitions. [2022-07-14 06:50:44,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:50:44,937 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 [2022-07-14 06:50:44,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:50:44,951 INFO L225 Difference]: With dead ends: 171 [2022-07-14 06:50:44,951 INFO L226 Difference]: Without dead ends: 168 [2022-07-14 06:50:44,953 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 [2022-07-14 06:50:44,956 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, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:50:44,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 269 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:50:44,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-14 06:50:45,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-07-14 06:50:45,005 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) [2022-07-14 06:50:45,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 181 transitions. [2022-07-14 06:50:45,014 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 181 transitions. Word has length 6 [2022-07-14 06:50:45,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:50:45,015 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 181 transitions. [2022-07-14 06:50:45,015 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) [2022-07-14 06:50:45,016 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 181 transitions. [2022-07-14 06:50:45,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 06:50:45,016 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:50:45,017 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 06:50:45,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-14 06:50:45,017 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)] === [2022-07-14 06:50:45,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:50:45,018 INFO L85 PathProgramCache]: Analyzing trace with hash 897735091, now seen corresponding path program 1 times [2022-07-14 06:50:45,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:50:45,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396113013] [2022-07-14 06:50:45,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:50:45,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:50:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:50:45,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:50:45,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396113013] [2022-07-14 06:50:45,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396113013] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:50:45,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:50:45,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:50:45,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709666949] [2022-07-14 06:50:45,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:50:45,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:50:45,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:50:45,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:50:45,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:50:45,106 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) [2022-07-14 06:50:45,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:50:45,222 INFO L93 Difference]: Finished difference Result 165 states and 178 transitions. [2022-07-14 06:50:45,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:50:45,223 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 [2022-07-14 06:50:45,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:50:45,226 INFO L225 Difference]: With dead ends: 165 [2022-07-14 06:50:45,226 INFO L226 Difference]: Without dead ends: 165 [2022-07-14 06:50:45,230 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 [2022-07-14 06:50:45,232 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 [2022-07-14 06:50:45,233 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] [2022-07-14 06:50:45,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-14 06:50:45,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-07-14 06:50:45,248 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) [2022-07-14 06:50:45,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 178 transitions. [2022-07-14 06:50:45,249 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 178 transitions. Word has length 6 [2022-07-14 06:50:45,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:50:45,249 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 178 transitions. [2022-07-14 06:50:45,250 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) [2022-07-14 06:50:45,250 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 178 transitions. [2022-07-14 06:50:45,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-14 06:50:45,250 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:50:45,251 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:50:45,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-14 06:50:45,251 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)] === [2022-07-14 06:50:45,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:50:45,252 INFO L85 PathProgramCache]: Analyzing trace with hash 165946077, now seen corresponding path program 1 times [2022-07-14 06:50:45,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:50:45,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502571496] [2022-07-14 06:50:45,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:50:45,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:50:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:45,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:50:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:45,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:50:45,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:50:45,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502571496] [2022-07-14 06:50:45,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502571496] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:50:45,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:50:45,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:50:45,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51047018] [2022-07-14 06:50:45,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:50:45,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:50:45,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:50:45,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:50:45,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:50:45,327 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) [2022-07-14 06:50:45,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:50:45,471 INFO L93 Difference]: Finished difference Result 176 states and 191 transitions. [2022-07-14 06:50:45,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:50:45,472 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 [2022-07-14 06:50:45,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:50:45,473 INFO L225 Difference]: With dead ends: 176 [2022-07-14 06:50:45,474 INFO L226 Difference]: Without dead ends: 176 [2022-07-14 06:50:45,474 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 [2022-07-14 06:50:45,475 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 [2022-07-14 06:50:45,475 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] [2022-07-14 06:50:45,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-07-14 06:50:45,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 166. [2022-07-14 06:50:45,482 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) [2022-07-14 06:50:45,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 179 transitions. [2022-07-14 06:50:45,483 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 179 transitions. Word has length 14 [2022-07-14 06:50:45,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:50:45,484 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 179 transitions. [2022-07-14 06:50:45,484 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) [2022-07-14 06:50:45,484 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 179 transitions. [2022-07-14 06:50:45,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-14 06:50:45,485 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:50:45,485 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:50:45,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-14 06:50:45,485 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)] === [2022-07-14 06:50:45,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:50:45,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1886331456, now seen corresponding path program 1 times [2022-07-14 06:50:45,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:50:45,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487216740] [2022-07-14 06:50:45,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:50:45,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:50:45,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:45,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:50:45,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:45,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-14 06:50:45,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:45,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-14 06:50:45,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:50:45,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487216740] [2022-07-14 06:50:45,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487216740] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:50:45,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:50:45,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:50:45,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191052556] [2022-07-14 06:50:45,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:50:45,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:50:45,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:50:45,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:50:45,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:50:45,629 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) [2022-07-14 06:50:45,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:50:45,948 INFO L93 Difference]: Finished difference Result 166 states and 180 transitions. [2022-07-14 06:50:45,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:50:45,949 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 [2022-07-14 06:50:45,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:50:45,951 INFO L225 Difference]: With dead ends: 166 [2022-07-14 06:50:45,951 INFO L226 Difference]: Without dead ends: 166 [2022-07-14 06:50:45,952 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 [2022-07-14 06:50:45,952 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 [2022-07-14 06:50:45,953 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] [2022-07-14 06:50:45,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-14 06:50:45,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2022-07-14 06:50:45,959 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) [2022-07-14 06:50:45,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 178 transitions. [2022-07-14 06:50:45,960 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 178 transitions. Word has length 24 [2022-07-14 06:50:45,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:50:45,960 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 178 transitions. [2022-07-14 06:50:45,960 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) [2022-07-14 06:50:45,961 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 178 transitions. [2022-07-14 06:50:45,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-14 06:50:45,961 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:50:45,961 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:50:45,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-14 06:50:45,962 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)] === [2022-07-14 06:50:45,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:50:45,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1886331457, now seen corresponding path program 1 times [2022-07-14 06:50:45,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:50:45,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515589261] [2022-07-14 06:50:45,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:50:45,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:50:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:46,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:50:46,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:46,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-14 06:50:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:46,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:50:46,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:50:46,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515589261] [2022-07-14 06:50:46,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515589261] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:50:46,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:50:46,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:50:46,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533725663] [2022-07-14 06:50:46,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:50:46,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:50:46,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:50:46,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:50:46,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:50:46,152 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) [2022-07-14 06:50:46,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:50:46,448 INFO L93 Difference]: Finished difference Result 165 states and 179 transitions. [2022-07-14 06:50:46,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:50:46,449 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 [2022-07-14 06:50:46,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:50:46,450 INFO L225 Difference]: With dead ends: 165 [2022-07-14 06:50:46,450 INFO L226 Difference]: Without dead ends: 165 [2022-07-14 06:50:46,451 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 [2022-07-14 06:50:46,452 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 [2022-07-14 06:50:46,452 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] [2022-07-14 06:50:46,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-14 06:50:46,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2022-07-14 06:50:46,457 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) [2022-07-14 06:50:46,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 177 transitions. [2022-07-14 06:50:46,458 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 177 transitions. Word has length 24 [2022-07-14 06:50:46,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:50:46,459 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 177 transitions. [2022-07-14 06:50:46,459 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) [2022-07-14 06:50:46,459 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 177 transitions. [2022-07-14 06:50:46,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-14 06:50:46,460 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:50:46,460 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:50:46,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-14 06:50:46,461 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)] === [2022-07-14 06:50:46,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:50:46,461 INFO L85 PathProgramCache]: Analyzing trace with hash 288330017, now seen corresponding path program 1 times [2022-07-14 06:50:46,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:50:46,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564887070] [2022-07-14 06:50:46,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:50:46,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:50:46,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:46,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:50:46,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:46,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-14 06:50:46,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:50:46,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:50:46,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564887070] [2022-07-14 06:50:46,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564887070] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:50:46,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155998231] [2022-07-14 06:50:46,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:50:46,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:50:46,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:50:46,601 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) [2022-07-14 06:50:46,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-14 06:50:46,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:46,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-14 06:50:46,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:50:46,818 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 [2022-07-14 06:50:46,991 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-14 06:50:46,992 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 [2022-07-14 06:50:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:50:47,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:50:47,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155998231] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:50:47,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:50:47,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2022-07-14 06:50:47,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348173498] [2022-07-14 06:50:47,057 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:50:47,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-14 06:50:47,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:50:47,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-14 06:50:47,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:50:47,059 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) [2022-07-14 06:50:47,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:50:47,439 INFO L93 Difference]: Finished difference Result 189 states and 205 transitions. [2022-07-14 06:50:47,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:50:47,439 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 [2022-07-14 06:50:47,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:50:47,440 INFO L225 Difference]: With dead ends: 189 [2022-07-14 06:50:47,440 INFO L226 Difference]: Without dead ends: 189 [2022-07-14 06:50:47,441 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 [2022-07-14 06:50:47,441 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, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:50:47,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 536 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 561 Invalid, 0 Unknown, 3 Unchecked, 0.3s Time] [2022-07-14 06:50:47,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-07-14 06:50:47,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 169. [2022-07-14 06:50:47,445 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) [2022-07-14 06:50:47,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 185 transitions. [2022-07-14 06:50:47,446 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 185 transitions. Word has length 26 [2022-07-14 06:50:47,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:50:47,446 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 185 transitions. [2022-07-14 06:50:47,447 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) [2022-07-14 06:50:47,447 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 185 transitions. [2022-07-14 06:50:47,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-14 06:50:47,448 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:50:47,448 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:50:47,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-14 06:50:47,649 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 [2022-07-14 06:50:47,649 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)] === [2022-07-14 06:50:47,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:50:47,650 INFO L85 PathProgramCache]: Analyzing trace with hash 288330018, now seen corresponding path program 1 times [2022-07-14 06:50:47,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:50:47,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255606629] [2022-07-14 06:50:47,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:50:47,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:50:47,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:47,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:50:47,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:47,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-14 06:50:47,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:47,880 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:50:47,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:50:47,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255606629] [2022-07-14 06:50:47,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255606629] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:50:47,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382275712] [2022-07-14 06:50:47,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:50:47,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:50:47,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:50:47,883 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) [2022-07-14 06:50:47,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-14 06:50:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:47,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-14 06:50:47,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:50:48,010 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 [2022-07-14 06:50:48,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:50:48,234 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 [2022-07-14 06:50:48,241 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:50:48,241 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 [2022-07-14 06:50:48,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:50:48,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:50:48,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382275712] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:50:48,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:50:48,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2022-07-14 06:50:48,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437182667] [2022-07-14 06:50:48,364 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:50:48,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-14 06:50:48,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:50:48,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-14 06:50:48,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-07-14 06:50:48,366 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) [2022-07-14 06:50:49,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:50:49,013 INFO L93 Difference]: Finished difference Result 171 states and 186 transitions. [2022-07-14 06:50:49,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:50:49,014 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 [2022-07-14 06:50:49,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:50:49,015 INFO L225 Difference]: With dead ends: 171 [2022-07-14 06:50:49,015 INFO L226 Difference]: Without dead ends: 171 [2022-07-14 06:50:49,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-07-14 06:50:49,016 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 [2022-07-14 06:50:49,016 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] [2022-07-14 06:50:49,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-14 06:50:49,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2022-07-14 06:50:49,019 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) [2022-07-14 06:50:49,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 184 transitions. [2022-07-14 06:50:49,020 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 184 transitions. Word has length 26 [2022-07-14 06:50:49,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:50:49,021 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 184 transitions. [2022-07-14 06:50:49,021 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) [2022-07-14 06:50:49,021 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 184 transitions. [2022-07-14 06:50:49,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-14 06:50:49,021 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:50:49,021 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] [2022-07-14 06:50:49,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-14 06:50:49,223 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 [2022-07-14 06:50:49,224 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)] === [2022-07-14 06:50:49,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:50:49,224 INFO L85 PathProgramCache]: Analyzing trace with hash -2087573769, now seen corresponding path program 1 times [2022-07-14 06:50:49,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:50:49,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70317340] [2022-07-14 06:50:49,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:50:49,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:50:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:49,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:50:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:49,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-14 06:50:49,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:49,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:50:49,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:50:49,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70317340] [2022-07-14 06:50:49,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70317340] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:50:49,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820463709] [2022-07-14 06:50:49,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:50:49,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:50:49,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:50:49,304 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) [2022-07-14 06:50:49,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-14 06:50:49,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:49,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-14 06:50:49,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:50:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:50:49,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:50:49,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:50:49,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820463709] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:50:49,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:50:49,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-07-14 06:50:49,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425740077] [2022-07-14 06:50:49,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:50:49,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:50:49,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:50:49,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:50:49,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:50:49,486 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) [2022-07-14 06:50:49,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:50:49,660 INFO L93 Difference]: Finished difference Result 170 states and 184 transitions. [2022-07-14 06:50:49,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:50:49,661 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 [2022-07-14 06:50:49,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:50:49,663 INFO L225 Difference]: With dead ends: 170 [2022-07-14 06:50:49,664 INFO L226 Difference]: Without dead ends: 170 [2022-07-14 06:50:49,664 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 [2022-07-14 06:50:49,665 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, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:50:49,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 873 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:50:49,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-14 06:50:49,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2022-07-14 06:50:49,668 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) [2022-07-14 06:50:49,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 183 transitions. [2022-07-14 06:50:49,671 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 183 transitions. Word has length 28 [2022-07-14 06:50:49,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:50:49,672 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 183 transitions. [2022-07-14 06:50:49,672 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) [2022-07-14 06:50:49,672 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 183 transitions. [2022-07-14 06:50:49,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-14 06:50:49,673 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:50:49,673 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] [2022-07-14 06:50:49,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-14 06:50:49,875 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 [2022-07-14 06:50:49,876 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)] === [2022-07-14 06:50:49,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:50:49,876 INFO L85 PathProgramCache]: Analyzing trace with hash -295058062, now seen corresponding path program 1 times [2022-07-14 06:50:49,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:50:49,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874013911] [2022-07-14 06:50:49,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:50:49,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:50:49,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:49,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:50:49,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:49,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-14 06:50:49,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:50:49,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:50:49,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874013911] [2022-07-14 06:50:49,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874013911] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:50:49,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101635126] [2022-07-14 06:50:49,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:50:49,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:50:49,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:50:49,944 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) [2022-07-14 06:50:49,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-14 06:50:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:50,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-14 06:50:50,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:50:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:50:50,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:50:50,100 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-14 06:50:50,101 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 [2022-07-14 06:50:50,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:50:50,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101635126] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:50:50,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:50:50,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 5 [2022-07-14 06:50:50,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096322319] [2022-07-14 06:50:50,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:50:50,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:50:50,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:50:50,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:50:50,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:50:50,118 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) [2022-07-14 06:50:50,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:50:50,329 INFO L93 Difference]: Finished difference Result 174 states and 190 transitions. [2022-07-14 06:50:50,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:50:50,329 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 [2022-07-14 06:50:50,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:50:50,330 INFO L225 Difference]: With dead ends: 174 [2022-07-14 06:50:50,330 INFO L226 Difference]: Without dead ends: 174 [2022-07-14 06:50:50,330 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 [2022-07-14 06:50:50,331 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 [2022-07-14 06:50:50,331 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] [2022-07-14 06:50:50,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-07-14 06:50:50,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2022-07-14 06:50:50,334 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) [2022-07-14 06:50:50,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 188 transitions. [2022-07-14 06:50:50,335 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 188 transitions. Word has length 29 [2022-07-14 06:50:50,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:50:50,335 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 188 transitions. [2022-07-14 06:50:50,335 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) [2022-07-14 06:50:50,335 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 188 transitions. [2022-07-14 06:50:50,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-14 06:50:50,336 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:50:50,336 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] [2022-07-14 06:50:50,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-14 06:50:50,536 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 [2022-07-14 06:50:50,537 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)] === [2022-07-14 06:50:50,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:50:50,537 INFO L85 PathProgramCache]: Analyzing trace with hash -295058061, now seen corresponding path program 1 times [2022-07-14 06:50:50,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:50:50,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415815323] [2022-07-14 06:50:50,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:50:50,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:50:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:50,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:50:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:50,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-14 06:50:50,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:50,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:50:50,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:50:50,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415815323] [2022-07-14 06:50:50,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415815323] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:50:50,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876115873] [2022-07-14 06:50:50,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:50:50,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:50:50,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:50:50,678 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) [2022-07-14 06:50:50,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-14 06:50:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:50,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-14 06:50:50,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:50:50,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:50:50,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:50:50,942 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:50:50,943 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 [2022-07-14 06:50:51,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:50:51,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876115873] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:50:51,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:50:51,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2022-07-14 06:50:51,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143879073] [2022-07-14 06:50:51,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:50:51,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-14 06:50:51,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:50:51,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-14 06:50:51,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-07-14 06:50:51,053 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) [2022-07-14 06:50:51,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:50:51,396 INFO L93 Difference]: Finished difference Result 179 states and 196 transitions. [2022-07-14 06:50:51,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:50:51,397 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 [2022-07-14 06:50:51,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:50:51,398 INFO L225 Difference]: With dead ends: 179 [2022-07-14 06:50:51,398 INFO L226 Difference]: Without dead ends: 179 [2022-07-14 06:50:51,399 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 [2022-07-14 06:50:51,399 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 [2022-07-14 06:50:51,400 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] [2022-07-14 06:50:51,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-14 06:50:51,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 172. [2022-07-14 06:50:51,403 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) [2022-07-14 06:50:51,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 187 transitions. [2022-07-14 06:50:51,404 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 187 transitions. Word has length 29 [2022-07-14 06:50:51,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:50:51,404 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 187 transitions. [2022-07-14 06:50:51,404 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) [2022-07-14 06:50:51,405 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 187 transitions. [2022-07-14 06:50:51,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-14 06:50:51,405 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:50:51,405 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] [2022-07-14 06:50:51,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-14 06:50:51,629 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 [2022-07-14 06:50:51,630 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)] === [2022-07-14 06:50:51,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:50:51,630 INFO L85 PathProgramCache]: Analyzing trace with hash -556865325, now seen corresponding path program 1 times [2022-07-14 06:50:51,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:50:51,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467595925] [2022-07-14 06:50:51,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:50:51,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:50:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:51,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:50:51,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:51,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-14 06:50:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:51,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-14 06:50:51,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:50:51,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467595925] [2022-07-14 06:50:51,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467595925] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:50:51,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:50:51,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-14 06:50:51,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016011502] [2022-07-14 06:50:51,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:50:51,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:50:51,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:50:51,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:50:51,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:50:51,709 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) [2022-07-14 06:50:52,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:50:52,026 INFO L93 Difference]: Finished difference Result 172 states and 187 transitions. [2022-07-14 06:50:52,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:50:52,027 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 [2022-07-14 06:50:52,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:50:52,028 INFO L225 Difference]: With dead ends: 172 [2022-07-14 06:50:52,028 INFO L226 Difference]: Without dead ends: 172 [2022-07-14 06:50:52,028 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 [2022-07-14 06:50:52,029 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 [2022-07-14 06:50:52,029 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] [2022-07-14 06:50:52,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-07-14 06:50:52,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2022-07-14 06:50:52,050 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) [2022-07-14 06:50:52,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 186 transitions. [2022-07-14 06:50:52,052 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 186 transitions. Word has length 30 [2022-07-14 06:50:52,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:50:52,052 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 186 transitions. [2022-07-14 06:50:52,052 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) [2022-07-14 06:50:52,053 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 186 transitions. [2022-07-14 06:50:52,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-14 06:50:52,053 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:50:52,053 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] [2022-07-14 06:50:52,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-14 06:50:52,053 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)] === [2022-07-14 06:50:52,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:50:52,054 INFO L85 PathProgramCache]: Analyzing trace with hash -556865324, now seen corresponding path program 1 times [2022-07-14 06:50:52,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:50:52,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020817349] [2022-07-14 06:50:52,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:50:52,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:50:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:52,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:50:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:52,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-14 06:50:52,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:50:52,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:50:52,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020817349] [2022-07-14 06:50:52,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020817349] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:50:52,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:50:52,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-14 06:50:52,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431489051] [2022-07-14 06:50:52,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:50:52,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:50:52,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:50:52,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:50:52,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:50:52,168 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) [2022-07-14 06:50:52,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:50:52,477 INFO L93 Difference]: Finished difference Result 170 states and 185 transitions. [2022-07-14 06:50:52,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:50:52,478 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 [2022-07-14 06:50:52,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:50:52,479 INFO L225 Difference]: With dead ends: 170 [2022-07-14 06:50:52,479 INFO L226 Difference]: Without dead ends: 170 [2022-07-14 06:50:52,479 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 [2022-07-14 06:50:52,480 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 [2022-07-14 06:50:52,480 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] [2022-07-14 06:50:52,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-14 06:50:52,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-07-14 06:50:52,488 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) [2022-07-14 06:50:52,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 185 transitions. [2022-07-14 06:50:52,490 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 185 transitions. Word has length 30 [2022-07-14 06:50:52,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:50:52,492 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 185 transitions. [2022-07-14 06:50:52,492 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) [2022-07-14 06:50:52,492 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 185 transitions. [2022-07-14 06:50:52,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-14 06:50:52,493 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:50:52,493 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] [2022-07-14 06:50:52,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-14 06:50:52,494 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)] === [2022-07-14 06:50:52,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:50:52,494 INFO L85 PathProgramCache]: Analyzing trace with hash 311753782, now seen corresponding path program 1 times [2022-07-14 06:50:52,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:50:52,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998545441] [2022-07-14 06:50:52,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:50:52,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:50:52,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:52,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:50:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:52,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-14 06:50:52,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:52,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-14 06:50:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:52,563 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:50:52,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:50:52,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998545441] [2022-07-14 06:50:52,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998545441] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:50:52,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986756648] [2022-07-14 06:50:52,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:50:52,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:50:52,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:50:52,568 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) [2022-07-14 06:50:52,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-14 06:50:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:52,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 06:50:52,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:50:52,737 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:50:52,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:50:52,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986756648] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:50:52,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:50:52,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-07-14 06:50:52,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439579165] [2022-07-14 06:50:52,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:50:52,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:50:52,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:50:52,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:50:52,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:50:52,739 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) [2022-07-14 06:50:52,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:50:52,751 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2022-07-14 06:50:52,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:50:52,751 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 [2022-07-14 06:50:52,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:50:52,752 INFO L225 Difference]: With dead ends: 158 [2022-07-14 06:50:52,752 INFO L226 Difference]: Without dead ends: 158 [2022-07-14 06:50:52,753 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 [2022-07-14 06:50:52,753 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 [2022-07-14 06:50:52,754 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] [2022-07-14 06:50:52,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-07-14 06:50:52,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2022-07-14 06:50:52,757 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) [2022-07-14 06:50:52,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 169 transitions. [2022-07-14 06:50:52,757 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 169 transitions. Word has length 41 [2022-07-14 06:50:52,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:50:52,758 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 169 transitions. [2022-07-14 06:50:52,758 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) [2022-07-14 06:50:52,758 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 169 transitions. [2022-07-14 06:50:52,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-14 06:50:52,759 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:50:52,759 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] [2022-07-14 06:50:52,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-14 06:50:52,984 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 [2022-07-14 06:50:52,985 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)] === [2022-07-14 06:50:52,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:50:52,985 INFO L85 PathProgramCache]: Analyzing trace with hash -670127466, now seen corresponding path program 1 times [2022-07-14 06:50:52,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:50:52,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906984128] [2022-07-14 06:50:52,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:50:52,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:50:53,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:53,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:50:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:53,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-14 06:50:53,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:53,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-14 06:50:53,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:53,186 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-14 06:50:53,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:50:53,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906984128] [2022-07-14 06:50:53,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906984128] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:50:53,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250035975] [2022-07-14 06:50:53,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:50:53,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:50:53,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:50:53,189 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) [2022-07-14 06:50:53,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-14 06:50:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:53,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-14 06:50:53,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:50:53,378 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 [2022-07-14 06:50:53,386 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 [2022-07-14 06:50:53,448 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:50:53,448 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 [2022-07-14 06:50:53,637 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-14 06:50:53,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-14 06:50:53,847 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 [2022-07-14 06:50:53,848 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: line 104069 column 46: unknown constant v_#valid_BEFORE_CALL_8 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) [2022-07-14 06:50:53,851 INFO L158 Benchmark]: Toolchain (without parser) took 10665.73ms. Allocated memory was 98.6MB in the beginning and 182.5MB in the end (delta: 83.9MB). Free memory was 63.9MB in the beginning and 84.1MB in the end (delta: -20.2MB). Peak memory consumption was 62.8MB. Max. memory is 16.1GB. [2022-07-14 06:50:53,851 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 98.6MB. Free memory was 53.4MB in the beginning and 53.3MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 06:50:53,852 INFO L158 Benchmark]: CACSL2BoogieTranslator took 417.99ms. Allocated memory is still 98.6MB. Free memory was 63.7MB in the beginning and 64.2MB in the end (delta: -454.8kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-14 06:50:53,852 INFO L158 Benchmark]: Boogie Procedure Inliner took 71.52ms. Allocated memory is still 98.6MB. Free memory was 64.2MB in the beginning and 61.5MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-14 06:50:53,852 INFO L158 Benchmark]: Boogie Preprocessor took 67.88ms. Allocated memory is still 98.6MB. Free memory was 61.5MB in the beginning and 59.7MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-14 06:50:53,852 INFO L158 Benchmark]: RCFGBuilder took 608.67ms. Allocated memory was 98.6MB in the beginning and 125.8MB in the end (delta: 27.3MB). Free memory was 59.4MB in the beginning and 86.5MB in the end (delta: -27.1MB). Peak memory consumption was 18.2MB. Max. memory is 16.1GB. [2022-07-14 06:50:53,853 INFO L158 Benchmark]: TraceAbstraction took 9492.10ms. Allocated memory was 125.8MB in the beginning and 182.5MB in the end (delta: 56.6MB). Free memory was 85.9MB in the beginning and 84.1MB in the end (delta: 1.8MB). Peak memory consumption was 57.9MB. Max. memory is 16.1GB. [2022-07-14 06:50:53,854 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 98.6MB. Free memory was 53.4MB in the beginning and 53.3MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 417.99ms. Allocated memory is still 98.6MB. Free memory was 63.7MB in the beginning and 64.2MB in the end (delta: -454.8kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 71.52ms. Allocated memory is still 98.6MB. Free memory was 64.2MB in the beginning and 61.5MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 67.88ms. Allocated memory is still 98.6MB. Free memory was 61.5MB in the beginning and 59.7MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 608.67ms. Allocated memory was 98.6MB in the beginning and 125.8MB in the end (delta: 27.3MB). Free memory was 59.4MB in the beginning and 86.5MB in the end (delta: -27.1MB). Peak memory consumption was 18.2MB. Max. memory is 16.1GB. * TraceAbstraction took 9492.10ms. Allocated memory was 125.8MB in the beginning and 182.5MB in the end (delta: 56.6MB). Free memory was 85.9MB in the beginning and 84.1MB in the end (delta: 1.8MB). Peak memory consumption was 57.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: line 104069 column 46: unknown constant v_#valid_BEFORE_CALL_8 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: line 104069 column 46: unknown constant v_#valid_BEFORE_CALL_8: de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1458) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-14 06:50:53,870 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-?-f4b24e3 [2022-07-14 06:50:55,829 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:50:55,833 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:50:55,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:50:55,870 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:50:55,871 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:50:55,875 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:50:55,878 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:50:55,880 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:50:55,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:50:55,893 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:50:55,895 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:50:55,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:50:55,897 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:50:55,898 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:50:55,902 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:50:55,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:50:55,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:50:55,907 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:50:55,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:50:55,914 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:50:55,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:50:55,916 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:50:55,918 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:50:55,919 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:50:55,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:50:55,926 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:50:55,926 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:50:55,927 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:50:55,928 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:50:55,929 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:50:55,929 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:50:55,930 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:50:55,931 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:50:55,932 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:50:55,933 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:50:55,933 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:50:55,934 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:50:55,934 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:50:55,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:50:55,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:50:55,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:50:55,942 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-14 06:50:55,975 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:50:55,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:50:55,976 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:50:55,976 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:50:55,977 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:50:55,977 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:50:55,978 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:50:55,978 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:50:55,978 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:50:55,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:50:55,979 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:50:55,979 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:50:55,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:50:55,980 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:50:55,980 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:50:55,980 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:50:55,981 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:50:55,981 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:50:55,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:50:55,981 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:50:55,981 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-14 06:50:55,982 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-14 06:50:55,982 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:50:55,982 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:50:55,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:50:55,982 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:50:55,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:50:55,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:50:55,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:50:55,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:50:55,984 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-14 06:50:55,984 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-14 06:50:55,984 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-14 06:50:55,984 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b81f923e96224472f8219a473f794261ff02356a47c6b09b527f0fc600725a8 [2022-07-14 06:50:56,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:50:56,305 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:50:56,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:50:56,309 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:50:56,309 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:50:56,311 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2c_insert_unequal.i [2022-07-14 06:50:56,358 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4853e90a5/e854bf9170024e009e0d5edbc39283bf/FLAG328c8eefa [2022-07-14 06:50:56,831 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:50:56,832 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_insert_unequal.i [2022-07-14 06:50:56,848 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4853e90a5/e854bf9170024e009e0d5edbc39283bf/FLAG328c8eefa [2022-07-14 06:50:57,158 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4853e90a5/e854bf9170024e009e0d5edbc39283bf [2022-07-14 06:50:57,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:50:57,162 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:50:57,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:50:57,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:50:57,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:50:57,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:50:57" (1/1) ... [2022-07-14 06:50:57,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56d752cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:50:57, skipping insertion in model container [2022-07-14 06:50:57,173 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:50:57" (1/1) ... [2022-07-14 06:50:57,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:50:57,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:50:57,497 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] [2022-07-14 06:50:57,500 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:50:57,514 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 06:50:57,582 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] [2022-07-14 06:50:57,583 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:50:57,610 INFO L208 MainTranslator]: Completed translation [2022-07-14 06:50:57,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:50:57 WrapperNode [2022-07-14 06:50:57,611 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:50:57,612 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 06:50:57,612 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 06:50:57,612 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 06:50:57,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:50:57" (1/1) ... [2022-07-14 06:50:57,634 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:50:57" (1/1) ... [2022-07-14 06:50:57,657 INFO L137 Inliner]: procedures = 130, calls = 58, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 192 [2022-07-14 06:50:57,658 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 06:50:57,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 06:50:57,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 06:50:57,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 06:50:57,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:50:57" (1/1) ... [2022-07-14 06:50:57,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:50:57" (1/1) ... [2022-07-14 06:50:57,674 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:50:57" (1/1) ... [2022-07-14 06:50:57,686 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:50:57" (1/1) ... [2022-07-14 06:50:57,696 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:50:57" (1/1) ... [2022-07-14 06:50:57,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:50:57" (1/1) ... [2022-07-14 06:50:57,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:50:57" (1/1) ... [2022-07-14 06:50:57,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 06:50:57,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 06:50:57,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 06:50:57,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 06:50:57,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:50:57" (1/1) ... [2022-07-14 06:50:57,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:50:57,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:50:57,769 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) [2022-07-14 06:50:57,771 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 [2022-07-14 06:50:57,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-14 06:50:57,804 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-07-14 06:50:57,804 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-07-14 06:50:57,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-14 06:50:57,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-14 06:50:57,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-14 06:50:57,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-14 06:50:57,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-14 06:50:57,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 06:50:57,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-14 06:50:57,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-14 06:50:57,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-14 06:50:57,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 06:50:57,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 06:50:57,996 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 06:50:57,997 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 06:50:58,675 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 06:50:58,682 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 06:50:58,682 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-14 06:50:58,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:50:58 BoogieIcfgContainer [2022-07-14 06:50:58,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 06:50:58,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 06:50:58,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 06:50:58,690 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 06:50:58,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 06:50:57" (1/3) ... [2022-07-14 06:50:58,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@413412a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:50:58, skipping insertion in model container [2022-07-14 06:50:58,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:50:57" (2/3) ... [2022-07-14 06:50:58,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@413412a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:50:58, skipping insertion in model container [2022-07-14 06:50:58,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:50:58" (3/3) ... [2022-07-14 06:50:58,695 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_insert_unequal.i [2022-07-14 06:50:58,708 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 06:50:58,709 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 82 error locations. [2022-07-14 06:50:58,755 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 06:50:58,762 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@8030d61, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2a22aa85 [2022-07-14 06:50:58,762 INFO L358 AbstractCegarLoop]: Starting to check reachability of 82 error locations. [2022-07-14 06:50:58,766 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) [2022-07-14 06:50:58,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 06:50:58,772 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:50:58,772 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 06:50:58,773 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)] === [2022-07-14 06:50:58,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:50:58,790 INFO L85 PathProgramCache]: Analyzing trace with hash 897735090, now seen corresponding path program 1 times [2022-07-14 06:50:58,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:50:58,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [856859055] [2022-07-14 06:50:58,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:50:58,803 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:50:58,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:50:58,809 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) [2022-07-14 06:50:58,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-14 06:50:58,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:58,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 06:50:58,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:50:58,965 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 [2022-07-14 06:50:58,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:50:58,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:50:58,979 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:50:58,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [856859055] [2022-07-14 06:50:58,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [856859055] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:50:58,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:50:58,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:50:58,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846596503] [2022-07-14 06:50:58,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:50:58,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:50:58,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:50:59,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:50:59,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:50:59,019 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) [2022-07-14 06:50:59,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:50:59,355 INFO L93 Difference]: Finished difference Result 171 states and 185 transitions. [2022-07-14 06:50:59,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:50:59,358 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 [2022-07-14 06:50:59,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:50:59,369 INFO L225 Difference]: With dead ends: 171 [2022-07-14 06:50:59,371 INFO L226 Difference]: Without dead ends: 168 [2022-07-14 06:50:59,372 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 [2022-07-14 06:50:59,376 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 [2022-07-14 06:50:59,378 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] [2022-07-14 06:50:59,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-14 06:50:59,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-07-14 06:50:59,431 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) [2022-07-14 06:50:59,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 181 transitions. [2022-07-14 06:50:59,444 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 181 transitions. Word has length 6 [2022-07-14 06:50:59,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:50:59,444 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 181 transitions. [2022-07-14 06:50:59,445 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) [2022-07-14 06:50:59,445 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 181 transitions. [2022-07-14 06:50:59,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 06:50:59,446 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:50:59,446 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 06:50:59,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-14 06:50:59,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:50:59,662 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)] === [2022-07-14 06:50:59,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:50:59,663 INFO L85 PathProgramCache]: Analyzing trace with hash 897735091, now seen corresponding path program 1 times [2022-07-14 06:50:59,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:50:59,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1255407967] [2022-07-14 06:50:59,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:50:59,668 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:50:59,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:50:59,669 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) [2022-07-14 06:50:59,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-14 06:50:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:50:59,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:50:59,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:50:59,748 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 [2022-07-14 06:50:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:50:59,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:50:59,768 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:50:59,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1255407967] [2022-07-14 06:50:59,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1255407967] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:50:59,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:50:59,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:50:59,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598948169] [2022-07-14 06:50:59,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:50:59,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:50:59,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:50:59,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:50:59,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:50:59,779 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) [2022-07-14 06:51:00,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:51:00,101 INFO L93 Difference]: Finished difference Result 165 states and 178 transitions. [2022-07-14 06:51:00,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:51:00,102 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 [2022-07-14 06:51:00,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:51:00,104 INFO L225 Difference]: With dead ends: 165 [2022-07-14 06:51:00,104 INFO L226 Difference]: Without dead ends: 165 [2022-07-14 06:51:00,104 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 [2022-07-14 06:51:00,109 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 [2022-07-14 06:51:00,110 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] [2022-07-14 06:51:00,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-14 06:51:00,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-07-14 06:51:00,117 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) [2022-07-14 06:51:00,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 178 transitions. [2022-07-14 06:51:00,118 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 178 transitions. Word has length 6 [2022-07-14 06:51:00,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:51:00,119 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 178 transitions. [2022-07-14 06:51:00,119 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) [2022-07-14 06:51:00,119 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 178 transitions. [2022-07-14 06:51:00,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-14 06:51:00,120 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:51:00,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:51:00,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-14 06:51:00,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:51:00,329 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)] === [2022-07-14 06:51:00,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:51:00,330 INFO L85 PathProgramCache]: Analyzing trace with hash 165946077, now seen corresponding path program 1 times [2022-07-14 06:51:00,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:51:00,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1458845921] [2022-07-14 06:51:00,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:51:00,331 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:51:00,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:51:00,332 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) [2022-07-14 06:51:00,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-14 06:51:00,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:51:00,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:51:00,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:51:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:51:00,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:51:00,442 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:51:00,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1458845921] [2022-07-14 06:51:00,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1458845921] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:51:00,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:51:00,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:51:00,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22502924] [2022-07-14 06:51:00,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:51:00,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:51:00,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:51:00,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:51:00,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:51:00,445 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) [2022-07-14 06:51:00,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:51:00,455 INFO L93 Difference]: Finished difference Result 176 states and 191 transitions. [2022-07-14 06:51:00,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:51:00,456 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 [2022-07-14 06:51:00,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:51:00,457 INFO L225 Difference]: With dead ends: 176 [2022-07-14 06:51:00,457 INFO L226 Difference]: Without dead ends: 176 [2022-07-14 06:51:00,457 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 [2022-07-14 06:51:00,458 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 [2022-07-14 06:51:00,459 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] [2022-07-14 06:51:00,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-07-14 06:51:00,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 166. [2022-07-14 06:51:00,467 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) [2022-07-14 06:51:00,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 179 transitions. [2022-07-14 06:51:00,468 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 179 transitions. Word has length 14 [2022-07-14 06:51:00,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:51:00,469 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 179 transitions. [2022-07-14 06:51:00,469 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) [2022-07-14 06:51:00,469 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 179 transitions. [2022-07-14 06:51:00,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-14 06:51:00,470 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:51:00,470 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:51:00,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-14 06:51:00,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:51:00,680 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)] === [2022-07-14 06:51:00,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:51:00,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1886331456, now seen corresponding path program 1 times [2022-07-14 06:51:00,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:51:00,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1592572989] [2022-07-14 06:51:00,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:51:00,682 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:51:00,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:51:00,683 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) [2022-07-14 06:51:00,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-14 06:51:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:51:00,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 06:51:00,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:51:00,791 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 [2022-07-14 06:51:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:51:00,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:51:00,832 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:51:00,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1592572989] [2022-07-14 06:51:00,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1592572989] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:51:00,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:51:00,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:51:00,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995559322] [2022-07-14 06:51:00,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:51:00,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:51:00,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:51:00,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:51:00,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:51:00,834 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) [2022-07-14 06:51:01,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:51:01,413 INFO L93 Difference]: Finished difference Result 166 states and 180 transitions. [2022-07-14 06:51:01,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:51:01,413 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 [2022-07-14 06:51:01,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:51:01,416 INFO L225 Difference]: With dead ends: 166 [2022-07-14 06:51:01,416 INFO L226 Difference]: Without dead ends: 166 [2022-07-14 06:51:01,416 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 [2022-07-14 06:51:01,417 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 20 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:51:01,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 514 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-14 06:51:01,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-14 06:51:01,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2022-07-14 06:51:01,426 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) [2022-07-14 06:51:01,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 178 transitions. [2022-07-14 06:51:01,427 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 178 transitions. Word has length 24 [2022-07-14 06:51:01,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:51:01,428 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 178 transitions. [2022-07-14 06:51:01,428 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) [2022-07-14 06:51:01,428 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 178 transitions. [2022-07-14 06:51:01,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-14 06:51:01,429 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:51:01,429 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:51:01,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-14 06:51:01,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:51:01,639 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)] === [2022-07-14 06:51:01,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:51:01,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1886331457, now seen corresponding path program 1 times [2022-07-14 06:51:01,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:51:01,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2072086708] [2022-07-14 06:51:01,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:51:01,640 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:51:01,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:51:01,642 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) [2022-07-14 06:51:01,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-14 06:51:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:51:01,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 06:51:01,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:51:01,766 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 [2022-07-14 06:51:01,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:51:01,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:51:01,843 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:51:01,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2072086708] [2022-07-14 06:51:01,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2072086708] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:51:01,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:51:01,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:51:01,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315975314] [2022-07-14 06:51:01,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:51:01,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:51:01,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:51:01,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:51:01,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:51:01,845 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) [2022-07-14 06:51:02,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:51:02,396 INFO L93 Difference]: Finished difference Result 165 states and 179 transitions. [2022-07-14 06:51:02,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:51:02,396 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 [2022-07-14 06:51:02,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:51:02,402 INFO L225 Difference]: With dead ends: 165 [2022-07-14 06:51:02,403 INFO L226 Difference]: Without dead ends: 165 [2022-07-14 06:51:02,403 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 [2022-07-14 06:51:02,404 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 19 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:51:02,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 538 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:51:02,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-14 06:51:02,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2022-07-14 06:51:02,419 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) [2022-07-14 06:51:02,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 177 transitions. [2022-07-14 06:51:02,420 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 177 transitions. Word has length 24 [2022-07-14 06:51:02,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:51:02,420 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 177 transitions. [2022-07-14 06:51:02,420 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) [2022-07-14 06:51:02,420 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 177 transitions. [2022-07-14 06:51:02,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-14 06:51:02,420 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:51:02,420 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:51:02,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-14 06:51:02,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:51:02,622 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)] === [2022-07-14 06:51:02,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:51:02,622 INFO L85 PathProgramCache]: Analyzing trace with hash 288330017, now seen corresponding path program 1 times [2022-07-14 06:51:02,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:51:02,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [498063199] [2022-07-14 06:51:02,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:51:02,623 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:51:02,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:51:02,624 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) [2022-07-14 06:51:02,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-14 06:51:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:51:02,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 06:51:02,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:51:02,765 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 [2022-07-14 06:51:02,943 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:51:02,944 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 [2022-07-14 06:51:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:51:02,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:51:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:51:03,157 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:51:03,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [498063199] [2022-07-14 06:51:03,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [498063199] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:51:03,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:51:03,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2022-07-14 06:51:03,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324975838] [2022-07-14 06:51:03,158 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:51:03,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 06:51:03,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:51:03,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 06:51:03,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:51:03,159 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) [2022-07-14 06:51:03,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:51:03,736 INFO L93 Difference]: Finished difference Result 171 states and 186 transitions. [2022-07-14 06:51:03,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:51:03,736 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 [2022-07-14 06:51:03,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:51:03,737 INFO L225 Difference]: With dead ends: 171 [2022-07-14 06:51:03,737 INFO L226 Difference]: Without dead ends: 171 [2022-07-14 06:51:03,738 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 [2022-07-14 06:51:03,738 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 [2022-07-14 06:51:03,738 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] [2022-07-14 06:51:03,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-14 06:51:03,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2022-07-14 06:51:03,743 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) [2022-07-14 06:51:03,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 185 transitions. [2022-07-14 06:51:03,743 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 185 transitions. Word has length 26 [2022-07-14 06:51:03,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:51:03,744 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 185 transitions. [2022-07-14 06:51:03,744 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) [2022-07-14 06:51:03,744 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 185 transitions. [2022-07-14 06:51:03,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-14 06:51:03,744 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:51:03,745 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:51:03,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-07-14 06:51:03,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:51:03,956 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)] === [2022-07-14 06:51:03,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:51:03,957 INFO L85 PathProgramCache]: Analyzing trace with hash 288330018, now seen corresponding path program 1 times [2022-07-14 06:51:03,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:51:03,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [70841289] [2022-07-14 06:51:03,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:51:03,958 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:51:03,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:51:03,959 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) [2022-07-14 06:51:03,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-14 06:51:04,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:51:04,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-14 06:51:04,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:51:04,100 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 [2022-07-14 06:51:04,105 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 [2022-07-14 06:51:06,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:51:06,319 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 [2022-07-14 06:51:06,330 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:51:06,330 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 [2022-07-14 06:51:06,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:51:06,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:51:08,649 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:51:08,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [70841289] [2022-07-14 06:51:08,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [70841289] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:51:08,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [179446013] [2022-07-14 06:51:08,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:51:08,650 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:51:08,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:51:08,652 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) [2022-07-14 06:51:08,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-07-14 06:51:08,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:51:08,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-14 06:51:08,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:51:08,886 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 [2022-07-14 06:51:08,895 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 [2022-07-14 06:51:09,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:51:09,123 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 [2022-07-14 06:51:09,135 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:51:09,136 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 [2022-07-14 06:51:09,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:51:09,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:51:11,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [179446013] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:51:11,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:51:11,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-14 06:51:11,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946381360] [2022-07-14 06:51:11,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:51:11,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 06:51:11,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:51:11,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 06:51:11,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=85, Unknown=2, NotChecked=0, Total=110 [2022-07-14 06:51:11,501 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) [2022-07-14 06:51:12,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:51:12,648 INFO L93 Difference]: Finished difference Result 171 states and 186 transitions. [2022-07-14 06:51:12,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:51:12,649 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 [2022-07-14 06:51:12,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:51:12,650 INFO L225 Difference]: With dead ends: 171 [2022-07-14 06:51:12,650 INFO L226 Difference]: Without dead ends: 171 [2022-07-14 06:51:12,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=31, Invalid=123, Unknown=2, NotChecked=0, Total=156 [2022-07-14 06:51:12,651 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 3 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:51:12,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 572 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 537 Invalid, 0 Unknown, 100 Unchecked, 1.0s Time] [2022-07-14 06:51:12,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-14 06:51:12,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2022-07-14 06:51:12,658 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) [2022-07-14 06:51:12,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 184 transitions. [2022-07-14 06:51:12,659 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 184 transitions. Word has length 26 [2022-07-14 06:51:12,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:51:12,660 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 184 transitions. [2022-07-14 06:51:12,660 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) [2022-07-14 06:51:12,660 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 184 transitions. [2022-07-14 06:51:12,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-14 06:51:12,661 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:51:12,661 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] [2022-07-14 06:51:12,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-07-14 06:51:12,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-07-14 06:51:13,065 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 [2022-07-14 06:51:13,065 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)] === [2022-07-14 06:51:13,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:51:13,066 INFO L85 PathProgramCache]: Analyzing trace with hash -2087573769, now seen corresponding path program 1 times [2022-07-14 06:51:13,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:51:13,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028130908] [2022-07-14 06:51:13,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:51:13,067 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:51:13,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:51:13,068 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) [2022-07-14 06:51:13,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-14 06:51:13,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:51:13,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 06:51:13,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:51:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:51:13,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:51:13,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:51:13,294 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:51:13,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028130908] [2022-07-14 06:51:13,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028130908] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:51:13,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:51:13,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-07-14 06:51:13,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876733639] [2022-07-14 06:51:13,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:51:13,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:51:13,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:51:13,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:51:13,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:51:13,295 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) [2022-07-14 06:51:13,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:51:13,441 INFO L93 Difference]: Finished difference Result 170 states and 184 transitions. [2022-07-14 06:51:13,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:51:13,442 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 [2022-07-14 06:51:13,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:51:13,443 INFO L225 Difference]: With dead ends: 170 [2022-07-14 06:51:13,444 INFO L226 Difference]: Without dead ends: 170 [2022-07-14 06:51:13,444 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 [2022-07-14 06:51:13,444 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 [2022-07-14 06:51:13,445 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] [2022-07-14 06:51:13,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-14 06:51:13,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2022-07-14 06:51:13,448 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) [2022-07-14 06:51:13,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 183 transitions. [2022-07-14 06:51:13,449 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 183 transitions. Word has length 28 [2022-07-14 06:51:13,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:51:13,449 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 183 transitions. [2022-07-14 06:51:13,450 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) [2022-07-14 06:51:13,450 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 183 transitions. [2022-07-14 06:51:13,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-14 06:51:13,450 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:51:13,450 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] [2022-07-14 06:51:13,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-07-14 06:51:13,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:51:13,660 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)] === [2022-07-14 06:51:13,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:51:13,661 INFO L85 PathProgramCache]: Analyzing trace with hash -295058062, now seen corresponding path program 1 times [2022-07-14 06:51:13,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:51:13,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1426182858] [2022-07-14 06:51:13,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:51:13,662 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:51:13,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:51:13,663 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) [2022-07-14 06:51:13,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-14 06:51:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:51:13,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 06:51:13,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:51:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:51:13,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:51:13,852 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-14 06:51:13,853 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 [2022-07-14 06:51:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:51:13,876 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:51:13,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1426182858] [2022-07-14 06:51:13,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1426182858] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:51:13,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:51:13,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2022-07-14 06:51:13,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87927736] [2022-07-14 06:51:13,877 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:51:13,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:51:13,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:51:13,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:51:13,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:51:13,878 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) [2022-07-14 06:51:14,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:51:14,153 INFO L93 Difference]: Finished difference Result 174 states and 190 transitions. [2022-07-14 06:51:14,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:51:14,154 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 [2022-07-14 06:51:14,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:51:14,157 INFO L225 Difference]: With dead ends: 174 [2022-07-14 06:51:14,157 INFO L226 Difference]: Without dead ends: 174 [2022-07-14 06:51:14,157 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 [2022-07-14 06:51:14,159 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, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:51:14,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 422 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:51:14,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-07-14 06:51:14,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2022-07-14 06:51:14,163 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) [2022-07-14 06:51:14,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 188 transitions. [2022-07-14 06:51:14,164 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 188 transitions. Word has length 29 [2022-07-14 06:51:14,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:51:14,164 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 188 transitions. [2022-07-14 06:51:14,164 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) [2022-07-14 06:51:14,165 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 188 transitions. [2022-07-14 06:51:14,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-14 06:51:14,167 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:51:14,167 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] [2022-07-14 06:51:14,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-14 06:51:14,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:51:14,377 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)] === [2022-07-14 06:51:14,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:51:14,378 INFO L85 PathProgramCache]: Analyzing trace with hash -295058061, now seen corresponding path program 1 times [2022-07-14 06:51:14,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:51:14,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313241782] [2022-07-14 06:51:14,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:51:14,378 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:51:14,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:51:14,380 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) [2022-07-14 06:51:14,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-14 06:51:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:51:14,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 06:51:14,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:51:14,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:51:14,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:51:14,753 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:51:14,753 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 [2022-07-14 06:51:15,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:51:15,319 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:51:15,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313241782] [2022-07-14 06:51:15,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313241782] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:51:15,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:51:15,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-07-14 06:51:15,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120800441] [2022-07-14 06:51:15,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:51:15,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 06:51:15,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:51:15,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 06:51:15,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:51:15,321 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) [2022-07-14 06:51:16,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:51:16,518 INFO L93 Difference]: Finished difference Result 179 states and 196 transitions. [2022-07-14 06:51:16,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:51:16,519 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 [2022-07-14 06:51:16,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:51:16,520 INFO L225 Difference]: With dead ends: 179 [2022-07-14 06:51:16,520 INFO L226 Difference]: Without dead ends: 179 [2022-07-14 06:51:16,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-07-14 06:51:16,521 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 16 mSDsluCounter, 1336 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:51:16,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1505 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-14 06:51:16,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-14 06:51:16,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 172. [2022-07-14 06:51:16,524 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) [2022-07-14 06:51:16,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 187 transitions. [2022-07-14 06:51:16,525 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 187 transitions. Word has length 29 [2022-07-14 06:51:16,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:51:16,525 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 187 transitions. [2022-07-14 06:51:16,525 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) [2022-07-14 06:51:16,525 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 187 transitions. [2022-07-14 06:51:16,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-14 06:51:16,526 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:51:16,526 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] [2022-07-14 06:51:16,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-14 06:51:16,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:51:16,727 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)] === [2022-07-14 06:51:16,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:51:16,727 INFO L85 PathProgramCache]: Analyzing trace with hash -556865325, now seen corresponding path program 1 times [2022-07-14 06:51:16,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:51:16,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889773321] [2022-07-14 06:51:16,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:51:16,728 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:51:16,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:51:16,729 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) [2022-07-14 06:51:16,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-14 06:51:16,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:51:16,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 06:51:16,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:51:16,876 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 [2022-07-14 06:51:16,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:51:16,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:51:16,966 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:51:16,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889773321] [2022-07-14 06:51:16,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889773321] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:51:16,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:51:16,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:51:16,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704782868] [2022-07-14 06:51:16,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:51:16,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:51:16,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:51:16,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:51:16,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:51:16,968 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) [2022-07-14 06:51:17,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:51:17,770 INFO L93 Difference]: Finished difference Result 172 states and 187 transitions. [2022-07-14 06:51:17,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:51:17,770 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 [2022-07-14 06:51:17,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:51:17,771 INFO L225 Difference]: With dead ends: 172 [2022-07-14 06:51:17,771 INFO L226 Difference]: Without dead ends: 172 [2022-07-14 06:51:17,772 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 [2022-07-14 06:51:17,772 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 22 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-07-14 06:51:17,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 586 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-14 06:51:17,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-07-14 06:51:17,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2022-07-14 06:51:17,776 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) [2022-07-14 06:51:17,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 186 transitions. [2022-07-14 06:51:17,777 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 186 transitions. Word has length 30 [2022-07-14 06:51:17,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:51:17,777 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 186 transitions. [2022-07-14 06:51:17,777 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) [2022-07-14 06:51:17,778 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 186 transitions. [2022-07-14 06:51:17,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-14 06:51:17,778 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:51:17,778 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] [2022-07-14 06:51:17,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-14 06:51:17,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:51:17,989 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)] === [2022-07-14 06:51:17,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:51:17,989 INFO L85 PathProgramCache]: Analyzing trace with hash -556865324, now seen corresponding path program 1 times [2022-07-14 06:51:17,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:51:17,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656449576] [2022-07-14 06:51:17,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:51:17,990 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:51:17,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:51:17,992 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) [2022-07-14 06:51:17,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-14 06:51:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:51:18,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 06:51:18,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:51:18,128 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 [2022-07-14 06:51:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:51:18,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:51:18,289 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:51:18,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656449576] [2022-07-14 06:51:18,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656449576] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:51:18,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:51:18,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:51:18,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231426664] [2022-07-14 06:51:18,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:51:18,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:51:18,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:51:18,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:51:18,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:51:18,290 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) [2022-07-14 06:51:19,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:51:19,312 INFO L93 Difference]: Finished difference Result 170 states and 185 transitions. [2022-07-14 06:51:19,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:51:19,313 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 [2022-07-14 06:51:19,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:51:19,314 INFO L225 Difference]: With dead ends: 170 [2022-07-14 06:51:19,314 INFO L226 Difference]: Without dead ends: 170 [2022-07-14 06:51:19,314 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 [2022-07-14 06:51:19,315 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 20 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:51:19,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 616 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-14 06:51:19,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-14 06:51:19,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-07-14 06:51:19,318 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) [2022-07-14 06:51:19,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 185 transitions. [2022-07-14 06:51:19,319 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 185 transitions. Word has length 30 [2022-07-14 06:51:19,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:51:19,319 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 185 transitions. [2022-07-14 06:51:19,319 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) [2022-07-14 06:51:19,320 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 185 transitions. [2022-07-14 06:51:19,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-14 06:51:19,320 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:51:19,320 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] [2022-07-14 06:51:19,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-14 06:51:19,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:51:19,527 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)] === [2022-07-14 06:51:19,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:51:19,527 INFO L85 PathProgramCache]: Analyzing trace with hash 311753782, now seen corresponding path program 1 times [2022-07-14 06:51:19,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:51:19,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786360934] [2022-07-14 06:51:19,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:51:19,528 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:51:19,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:51:19,529 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) [2022-07-14 06:51:19,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-14 06:51:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:51:19,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 06:51:19,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:51:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:51:19,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:51:19,776 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:51:19,776 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:51:19,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786360934] [2022-07-14 06:51:19,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [786360934] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:51:19,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:51:19,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-07-14 06:51:19,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147640020] [2022-07-14 06:51:19,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:51:19,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:51:19,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:51:19,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:51:19,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:51:19,778 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) [2022-07-14 06:51:19,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:51:19,809 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2022-07-14 06:51:19,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:51:19,810 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 [2022-07-14 06:51:19,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:51:19,810 INFO L225 Difference]: With dead ends: 158 [2022-07-14 06:51:19,811 INFO L226 Difference]: Without dead ends: 158 [2022-07-14 06:51:19,811 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 [2022-07-14 06:51:19,811 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 [2022-07-14 06:51:19,812 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] [2022-07-14 06:51:19,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-07-14 06:51:19,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2022-07-14 06:51:19,814 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) [2022-07-14 06:51:19,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 169 transitions. [2022-07-14 06:51:19,815 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 169 transitions. Word has length 41 [2022-07-14 06:51:19,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:51:19,815 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 169 transitions. [2022-07-14 06:51:19,815 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) [2022-07-14 06:51:19,816 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 169 transitions. [2022-07-14 06:51:19,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-14 06:51:19,816 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:51:19,816 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] [2022-07-14 06:51:19,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-14 06:51:20,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:51:20,017 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)] === [2022-07-14 06:51:20,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:51:20,017 INFO L85 PathProgramCache]: Analyzing trace with hash -670127466, now seen corresponding path program 1 times [2022-07-14 06:51:20,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:51:20,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714778525] [2022-07-14 06:51:20,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:51:20,018 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:51:20,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:51:20,019 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) [2022-07-14 06:51:20,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-14 06:51:20,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:51:20,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-14 06:51:20,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:51:20,298 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 [2022-07-14 06:51:20,329 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 [2022-07-14 06:51:20,501 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:51:20,502 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 [2022-07-14 06:51:20,537 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 [2022-07-14 06:51:20,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:51:20,664 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 [2022-07-14 06:51:20,955 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-14 06:51:20,955 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 [2022-07-14 06:51:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:51:21,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:51:21,325 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:51:21,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714778525] [2022-07-14 06:51:21,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714778525] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:51:21,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [442551516] [2022-07-14 06:51:21,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:51:21,325 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:51:21,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:51:21,328 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) [2022-07-14 06:51:21,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-07-14 06:51:21,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:51:21,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-14 06:51:21,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:51:21,655 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-14 06:51:21,656 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 [2022-07-14 06:51:21,709 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 06:51:21,709 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 [2022-07-14 06:51:21,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:51:21,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:51:21,827 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-14 06:51:21,828 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 [2022-07-14 06:51:21,953 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 06:51:21,954 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 [2022-07-14 06:51:22,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:51:22,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:51:22,218 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-14 06:51:22,219 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 [2022-07-14 06:51:22,953 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 06:51:22,953 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 [2022-07-14 06:51:23,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:51:23,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:51:23,116 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-14 06:51:23,117 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 [2022-07-14 06:51:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-14 06:51:23,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:51:23,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [442551516] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:51:23,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:51:23,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2022-07-14 06:51:23,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907825761] [2022-07-14 06:51:23,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:51:23,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-14 06:51:23,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:51:23,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-14 06:51:23,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-07-14 06:51:23,450 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) [2022-07-14 06:51:32,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:51:32,177 INFO L93 Difference]: Finished difference Result 165 states and 175 transitions. [2022-07-14 06:51:32,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 06:51:32,177 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 [2022-07-14 06:51:32,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:51:32,178 INFO L225 Difference]: With dead ends: 165 [2022-07-14 06:51:32,178 INFO L226 Difference]: Without dead ends: 165 [2022-07-14 06:51:32,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2022-07-14 06:51:32,180 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 12 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 643 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:51:32,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1008 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 229 Invalid, 0 Unknown, 643 Unchecked, 0.4s Time] [2022-07-14 06:51:32,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-14 06:51:32,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-07-14 06:51:32,183 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) [2022-07-14 06:51:32,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 175 transitions. [2022-07-14 06:51:32,184 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 175 transitions. Word has length 43 [2022-07-14 06:51:32,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:51:32,184 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 175 transitions. [2022-07-14 06:51:32,184 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) [2022-07-14 06:51:32,185 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 175 transitions. [2022-07-14 06:51:32,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-14 06:51:32,185 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:51:32,185 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] [2022-07-14 06:51:32,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2022-07-14 06:51:32,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-07-14 06:51:32,590 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 [2022-07-14 06:51:32,590 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)] === [2022-07-14 06:51:32,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:51:32,591 INFO L85 PathProgramCache]: Analyzing trace with hash -670127465, now seen corresponding path program 1 times [2022-07-14 06:51:32,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:51:32,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884473813] [2022-07-14 06:51:32,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:51:32,592 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:51:32,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:51:32,593 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) [2022-07-14 06:51:32,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-14 06:51:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:51:32,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-14 06:51:32,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:51:32,871 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 [2022-07-14 06:51:32,878 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 [2022-07-14 06:51:32,899 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 [2022-07-14 06:51:32,903 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 [2022-07-14 06:51:35,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:51:35,034 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 [2022-07-14 06:51:35,047 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:51:35,047 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 [2022-07-14 06:51:35,103 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 [2022-07-14 06:51:37,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:51:37,293 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 [2022-07-14 06:51:37,696 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:51:37,696 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 [2022-07-14 06:51:37,786 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:51:37,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:51:38,100 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:51:38,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1884473813] [2022-07-14 06:51:38,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1884473813] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:51:38,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [23210249] [2022-07-14 06:51:38,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:51:38,101 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:51:38,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:51:38,102 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) [2022-07-14 06:51:38,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-07-14 06:51:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:51:38,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-14 06:51:38,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:51:38,444 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 [2022-07-14 06:51:38,461 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 [2022-07-14 06:51:38,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:51:38,589 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 [2022-07-14 06:51:38,682 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 [2022-07-14 06:51:40,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:51:40,994 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 [2022-07-14 06:51:41,428 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 [2022-07-14 06:51:41,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:51:41,564 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 12 treesize of output 14 [2022-07-14 06:51:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-14 06:51:41,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:51:41,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [23210249] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:51:41,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:51:41,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-07-14 06:51:41,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952478089] [2022-07-14 06:51:41,822 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:51:41,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-14 06:51:41,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:51:41,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-14 06:51:41,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=434, Unknown=3, NotChecked=0, Total=506 [2022-07-14 06:51:41,824 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) [2022-07-14 06:51:45,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:51:45,285 INFO L93 Difference]: Finished difference Result 164 states and 174 transitions. [2022-07-14 06:51:45,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 06:51:45,286 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 [2022-07-14 06:51:45,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:51:45,287 INFO L225 Difference]: With dead ends: 164 [2022-07-14 06:51:45,287 INFO L226 Difference]: Without dead ends: 164 [2022-07-14 06:51:45,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=112, Invalid=696, Unknown=4, NotChecked=0, Total=812 [2022-07-14 06:51:45,288 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 21 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:51:45,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1216 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 501 Invalid, 0 Unknown, 532 Unchecked, 1.0s Time] [2022-07-14 06:51:45,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-07-14 06:51:45,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-07-14 06:51:45,291 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) [2022-07-14 06:51:45,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 174 transitions. [2022-07-14 06:51:45,292 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 174 transitions. Word has length 43 [2022-07-14 06:51:45,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:51:45,293 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 174 transitions. [2022-07-14 06:51:45,293 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) [2022-07-14 06:51:45,293 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 174 transitions. [2022-07-14 06:51:45,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-14 06:51:45,294 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:51:45,294 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] [2022-07-14 06:51:45,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-07-14 06:51:45,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-07-14 06:51:45,699 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 [2022-07-14 06:51:45,699 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)] === [2022-07-14 06:51:45,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:51:45,700 INFO L85 PathProgramCache]: Analyzing trace with hash -759331621, now seen corresponding path program 1 times [2022-07-14 06:51:45,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:51:45,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959908330] [2022-07-14 06:51:45,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:51:45,700 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:51:45,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:51:45,701 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) [2022-07-14 06:51:45,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-14 06:51:45,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:51:45,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-14 06:51:45,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:51:46,064 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 [2022-07-14 06:51:46,401 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 12 treesize of output 8 [2022-07-14 06:51:46,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:51:46,838 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 19 treesize of output 21 [2022-07-14 06:51:46,884 INFO L356 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2022-07-14 06:51:46,885 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 24 treesize of output 35 [2022-07-14 06:51:46,988 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 29 treesize of output 17 [2022-07-14 06:51:47,071 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:51:47,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:51:47,273 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:51:47,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959908330] [2022-07-14 06:51:47,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959908330] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:51:47,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1677913426] [2022-07-14 06:51:47,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:51:47,274 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:51:47,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:51:47,275 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) [2022-07-14 06:51:47,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-07-14 06:51:47,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:51:47,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-14 06:51:47,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:51:47,769 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 [2022-07-14 06:51:48,193 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 12 treesize of output 8 [2022-07-14 06:51:48,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:51:48,508 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 19 treesize of output 21 [2022-07-14 06:51:48,552 INFO L356 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2022-07-14 06:51:48,552 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 24 treesize of output 35 [2022-07-14 06:51:48,716 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 [2022-07-14 06:51:48,820 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:51:48,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:51:48,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1677913426] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:51:48,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:51:48,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2022-07-14 06:51:48,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773829810] [2022-07-14 06:51:48,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:51:48,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-14 06:51:48,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:51:48,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-14 06:51:48,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=862, Unknown=3, NotChecked=0, Total=992 [2022-07-14 06:51:48,995 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) [2022-07-14 06:51:51,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:51:51,749 INFO L93 Difference]: Finished difference Result 287 states and 307 transitions. [2022-07-14 06:51:51,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-14 06:51:51,750 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 [2022-07-14 06:51:51,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:51:51,751 INFO L225 Difference]: With dead ends: 287 [2022-07-14 06:51:51,751 INFO L226 Difference]: Without dead ends: 287 [2022-07-14 06:51:51,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 67 SyntacticMatches, 9 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=238, Invalid=1476, Unknown=8, NotChecked=0, Total=1722 [2022-07-14 06:51:51,752 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 160 mSDsluCounter, 1287 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s 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, 2.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:51:51,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 1370 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1118 Invalid, 0 Unknown, 190 Unchecked, 2.1s Time] [2022-07-14 06:51:51,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-07-14 06:51:51,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 171. [2022-07-14 06:51:51,756 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) [2022-07-14 06:51:51,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 191 transitions. [2022-07-14 06:51:51,757 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 191 transitions. Word has length 46 [2022-07-14 06:51:51,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:51:51,758 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 191 transitions. [2022-07-14 06:51:51,758 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) [2022-07-14 06:51:51,758 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 191 transitions. [2022-07-14 06:51:51,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-14 06:51:51,759 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:51:51,759 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] [2022-07-14 06:51:51,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-07-14 06:51:51,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-07-14 06:51:52,171 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 [2022-07-14 06:51:52,172 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)] === [2022-07-14 06:51:52,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:51:52,172 INFO L85 PathProgramCache]: Analyzing trace with hash -759331620, now seen corresponding path program 1 times [2022-07-14 06:51:52,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:51:52,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2100127420] [2022-07-14 06:51:52,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:51:52,173 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:51:52,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:51:52,174 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) [2022-07-14 06:51:52,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-14 06:51:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:51:52,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-14 06:51:52,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:51:52,653 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 [2022-07-14 06:51:52,662 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 [2022-07-14 06:51:53,294 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 22 treesize of output 14 [2022-07-14 06:51:53,302 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 [2022-07-14 06:51:53,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:51:53,843 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 28 treesize of output 28 [2022-07-14 06:51:53,878 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-14 06:51:53,879 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 18 treesize of output 18 [2022-07-14 06:51:53,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:51:53,902 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 [2022-07-14 06:51:53,913 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 [2022-07-14 06:51:54,039 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 15 treesize of output 7 [2022-07-14 06:51:54,048 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 [2022-07-14 06:51:54,211 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:51:54,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:51:54,857 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:51:54,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2100127420] [2022-07-14 06:51:54,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2100127420] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:51:54,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [218099586] [2022-07-14 06:51:54,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:51:54,858 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:51:54,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:51:54,864 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) [2022-07-14 06:51:54,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-07-14 06:51:55,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:51:55,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-14 06:51:55,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:51:55,463 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 [2022-07-14 06:51:55,472 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 [2022-07-14 06:51:56,261 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 22 treesize of output 14 [2022-07-14 06:51:56,271 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 7 treesize of output 3 [2022-07-14 06:51:56,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:51:56,803 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 [2022-07-14 06:51:56,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:51:56,819 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 [2022-07-14 06:51:56,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:51:56,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-07-14 06:51:56,859 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-14 06:51:56,860 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 18 treesize of output 18 [2022-07-14 06:51:57,017 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 [2022-07-14 06:51:57,024 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 [2022-07-14 06:51:57,051 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:51:57,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:51:57,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [218099586] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:51:57,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:51:57,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 32 [2022-07-14 06:51:57,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060439024] [2022-07-14 06:51:57,564 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:51:57,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-14 06:51:57,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:51:57,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-14 06:51:57,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1238, Unknown=13, NotChecked=0, Total=1406 [2022-07-14 06:51:57,565 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) [2022-07-14 06:52:00,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:52:00,826 INFO L93 Difference]: Finished difference Result 320 states and 339 transitions. [2022-07-14 06:52:00,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-14 06:52:00,826 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 [2022-07-14 06:52:00,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:52:00,828 INFO L225 Difference]: With dead ends: 320 [2022-07-14 06:52:00,828 INFO L226 Difference]: Without dead ends: 320 [2022-07-14 06:52:00,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=285, Invalid=2146, Unknown=19, NotChecked=0, Total=2450 [2022-07-14 06:52:00,829 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 202 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s 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, 2.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:52:00,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 952 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1133 Invalid, 0 Unknown, 141 Unchecked, 2.2s Time] [2022-07-14 06:52:00,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-07-14 06:52:00,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 171. [2022-07-14 06:52:00,833 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) [2022-07-14 06:52:00,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 189 transitions. [2022-07-14 06:52:00,834 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 189 transitions. Word has length 46 [2022-07-14 06:52:00,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:52:00,834 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 189 transitions. [2022-07-14 06:52:00,835 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) [2022-07-14 06:52:00,835 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 189 transitions. [2022-07-14 06:52:00,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-14 06:52:00,835 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:52:00,836 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] [2022-07-14 06:52:00,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-14 06:52:01,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-07-14 06:52:01,248 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 [2022-07-14 06:52:01,248 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)] === [2022-07-14 06:52:01,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:52:01,249 INFO L85 PathProgramCache]: Analyzing trace with hash -2064445378, now seen corresponding path program 1 times [2022-07-14 06:52:01,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:52:01,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [594978562] [2022-07-14 06:52:01,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:52:01,249 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:52:01,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:52:01,250 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) [2022-07-14 06:52:01,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-14 06:52:01,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:52:01,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 06:52:01,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:52:01,469 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-14 06:52:01,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:52:01,469 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:52:01,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [594978562] [2022-07-14 06:52:01,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [594978562] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:52:01,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:52:01,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:52:01,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680130883] [2022-07-14 06:52:01,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:52:01,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:52:01,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:52:01,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:52:01,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:52:01,470 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) [2022-07-14 06:52:01,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:52:01,510 INFO L93 Difference]: Finished difference Result 167 states and 177 transitions. [2022-07-14 06:52:01,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:52:01,511 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 [2022-07-14 06:52:01,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:52:01,512 INFO L225 Difference]: With dead ends: 167 [2022-07-14 06:52:01,512 INFO L226 Difference]: Without dead ends: 167 [2022-07-14 06:52:01,512 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 [2022-07-14 06:52:01,512 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 [2022-07-14 06:52:01,513 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] [2022-07-14 06:52:01,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-07-14 06:52:01,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2022-07-14 06:52:01,515 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) [2022-07-14 06:52:01,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 176 transitions. [2022-07-14 06:52:01,516 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 176 transitions. Word has length 47 [2022-07-14 06:52:01,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:52:01,516 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 176 transitions. [2022-07-14 06:52:01,516 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) [2022-07-14 06:52:01,517 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 176 transitions. [2022-07-14 06:52:01,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-14 06:52:01,517 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:52:01,517 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] [2022-07-14 06:52:01,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-14 06:52:01,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:52:01,728 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)] === [2022-07-14 06:52:01,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:52:01,729 INFO L85 PathProgramCache]: Analyzing trace with hash 344455491, now seen corresponding path program 1 times [2022-07-14 06:52:01,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:52:01,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011273094] [2022-07-14 06:52:01,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:52:01,729 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:52:01,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:52:01,730 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) [2022-07-14 06:52:01,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-14 06:52:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:52:01,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 06:52:01,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:52:01,978 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-14 06:52:01,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:52:02,582 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-14 06:52:02,582 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:52:02,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011273094] [2022-07-14 06:52:02,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011273094] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:52:02,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:52:02,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-14 06:52:02,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966781620] [2022-07-14 06:52:02,582 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:52:02,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:52:02,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:52:02,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:52:02,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:52:02,583 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) [2022-07-14 06:52:02,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:52:02,641 INFO L93 Difference]: Finished difference Result 163 states and 172 transitions. [2022-07-14 06:52:02,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:52:02,642 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 [2022-07-14 06:52:02,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:52:02,643 INFO L225 Difference]: With dead ends: 163 [2022-07-14 06:52:02,643 INFO L226 Difference]: Without dead ends: 163 [2022-07-14 06:52:02,643 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 [2022-07-14 06:52:02,644 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 [2022-07-14 06:52:02,644 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] [2022-07-14 06:52:02,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-07-14 06:52:02,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-07-14 06:52:02,647 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) [2022-07-14 06:52:02,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 172 transitions. [2022-07-14 06:52:02,647 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 172 transitions. Word has length 49 [2022-07-14 06:52:02,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:52:02,648 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 172 transitions. [2022-07-14 06:52:02,648 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) [2022-07-14 06:52:02,648 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 172 transitions. [2022-07-14 06:52:02,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-14 06:52:02,648 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:52:02,648 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] [2022-07-14 06:52:02,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-14 06:52:02,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:52:02,849 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)] === [2022-07-14 06:52:02,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:52:02,850 INFO L85 PathProgramCache]: Analyzing trace with hash 2088184022, now seen corresponding path program 1 times [2022-07-14 06:52:02,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:52:02,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [849888585] [2022-07-14 06:52:02,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:52:02,850 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:52:02,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:52:02,851 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) [2022-07-14 06:52:02,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-14 06:52:03,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:52:03,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 06:52:03,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:52:03,068 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-14 06:52:03,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:52:03,069 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:52:03,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [849888585] [2022-07-14 06:52:03,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [849888585] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:52:03,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:52:03,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:52:03,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424468229] [2022-07-14 06:52:03,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:52:03,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:52:03,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:52:03,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:52:03,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:52:03,070 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) [2022-07-14 06:52:03,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:52:03,424 INFO L93 Difference]: Finished difference Result 180 states and 190 transitions. [2022-07-14 06:52:03,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:52:03,425 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 [2022-07-14 06:52:03,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:52:03,426 INFO L225 Difference]: With dead ends: 180 [2022-07-14 06:52:03,426 INFO L226 Difference]: Without dead ends: 180 [2022-07-14 06:52:03,426 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 [2022-07-14 06:52:03,426 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 126 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-07-14 06:52:03,427 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] [2022-07-14 06:52:03,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-07-14 06:52:03,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 162. [2022-07-14 06:52:03,430 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) [2022-07-14 06:52:03,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 171 transitions. [2022-07-14 06:52:03,430 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 171 transitions. Word has length 50 [2022-07-14 06:52:03,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:52:03,431 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 171 transitions. [2022-07-14 06:52:03,431 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) [2022-07-14 06:52:03,431 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 171 transitions. [2022-07-14 06:52:03,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-14 06:52:03,431 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:52:03,431 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] [2022-07-14 06:52:03,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-07-14 06:52:03,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:52:03,642 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)] === [2022-07-14 06:52:03,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:52:03,643 INFO L85 PathProgramCache]: Analyzing trace with hash 2088184023, now seen corresponding path program 1 times [2022-07-14 06:52:03,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:52:03,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [457421625] [2022-07-14 06:52:03,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:52:03,643 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:52:03,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:52:03,645 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) [2022-07-14 06:52:03,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-14 06:52:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:52:03,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 06:52:03,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:52:03,947 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-14 06:52:03,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:52:03,947 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:52:03,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [457421625] [2022-07-14 06:52:03,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [457421625] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:52:03,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:52:03,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:52:03,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441951127] [2022-07-14 06:52:03,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:52:03,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:52:03,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:52:03,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:52:03,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:52:03,949 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) [2022-07-14 06:52:04,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:52:04,518 INFO L93 Difference]: Finished difference Result 161 states and 170 transitions. [2022-07-14 06:52:04,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:52:04,519 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 [2022-07-14 06:52:04,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:52:04,520 INFO L225 Difference]: With dead ends: 161 [2022-07-14 06:52:04,520 INFO L226 Difference]: Without dead ends: 161 [2022-07-14 06:52:04,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:52:04,521 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 129 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:52:04,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 221 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:52:04,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-14 06:52:04,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-07-14 06:52:04,524 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) [2022-07-14 06:52:04,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 170 transitions. [2022-07-14 06:52:04,525 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 170 transitions. Word has length 50 [2022-07-14 06:52:04,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:52:04,525 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 170 transitions. [2022-07-14 06:52:04,526 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) [2022-07-14 06:52:04,526 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 170 transitions. [2022-07-14 06:52:04,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-14 06:52:04,526 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:52:04,527 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] [2022-07-14 06:52:04,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-14 06:52:04,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:52:04,738 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)] === [2022-07-14 06:52:04,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:52:04,738 INFO L85 PathProgramCache]: Analyzing trace with hash 2088184470, now seen corresponding path program 1 times [2022-07-14 06:52:04,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:52:04,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1395656115] [2022-07-14 06:52:04,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:52:04,739 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:52:04,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:52:04,740 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) [2022-07-14 06:52:04,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-14 06:52:04,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:52:04,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-14 06:52:04,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:52:05,008 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-14 06:52:05,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:52:05,009 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:52:05,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1395656115] [2022-07-14 06:52:05,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1395656115] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:52:05,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:52:05,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:52:05,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127234517] [2022-07-14 06:52:05,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:52:05,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:52:05,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:52:05,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:52:05,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:52:05,010 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) [2022-07-14 06:52:05,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:52:05,300 INFO L93 Difference]: Finished difference Result 173 states and 183 transitions. [2022-07-14 06:52:05,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:52:05,301 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 [2022-07-14 06:52:05,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:52:05,302 INFO L225 Difference]: With dead ends: 173 [2022-07-14 06:52:05,302 INFO L226 Difference]: Without dead ends: 173 [2022-07-14 06:52:05,302 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 [2022-07-14 06:52:05,302 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, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:52:05,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 125 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:52:05,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-07-14 06:52:05,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 155. [2022-07-14 06:52:05,306 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) [2022-07-14 06:52:05,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 164 transitions. [2022-07-14 06:52:05,306 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 164 transitions. Word has length 50 [2022-07-14 06:52:05,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:52:05,306 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 164 transitions. [2022-07-14 06:52:05,306 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) [2022-07-14 06:52:05,307 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 164 transitions. [2022-07-14 06:52:05,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-14 06:52:05,307 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:52:05,307 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] [2022-07-14 06:52:05,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-14 06:52:05,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:52:05,517 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)] === [2022-07-14 06:52:05,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:52:05,518 INFO L85 PathProgramCache]: Analyzing trace with hash 2088184471, now seen corresponding path program 1 times [2022-07-14 06:52:05,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:52:05,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51419869] [2022-07-14 06:52:05,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:52:05,519 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:52:05,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:52:05,521 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) [2022-07-14 06:52:05,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-14 06:52:05,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:52:05,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 06:52:05,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:52:05,920 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-14 06:52:05,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:52:05,920 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:52:05,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51419869] [2022-07-14 06:52:05,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51419869] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:52:05,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:52:05,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:52:05,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020325585] [2022-07-14 06:52:05,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:52:05,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:52:05,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:52:05,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:52:05,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:52:05,925 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) [2022-07-14 06:52:06,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:52:06,301 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2022-07-14 06:52:06,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:52:06,302 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 [2022-07-14 06:52:06,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:52:06,303 INFO L225 Difference]: With dead ends: 149 [2022-07-14 06:52:06,303 INFO L226 Difference]: Without dead ends: 149 [2022-07-14 06:52:06,303 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 [2022-07-14 06:52:06,304 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 246 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:52:06,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 152 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:52:06,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-14 06:52:06,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-07-14 06:52:06,307 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) [2022-07-14 06:52:06,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 158 transitions. [2022-07-14 06:52:06,307 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 158 transitions. Word has length 50 [2022-07-14 06:52:06,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:52:06,308 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 158 transitions. [2022-07-14 06:52:06,308 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) [2022-07-14 06:52:06,308 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 158 transitions. [2022-07-14 06:52:06,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-14 06:52:06,309 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:52:06,309 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] [2022-07-14 06:52:06,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-14 06:52:06,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:52:06,521 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)] === [2022-07-14 06:52:06,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:52:06,521 INFO L85 PathProgramCache]: Analyzing trace with hash 309195281, now seen corresponding path program 1 times [2022-07-14 06:52:06,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:52:06,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [29527818] [2022-07-14 06:52:06,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:52:06,522 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:52:06,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:52:06,523 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) [2022-07-14 06:52:06,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-14 06:52:06,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:52:06,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 06:52:06,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:52:06,787 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 [2022-07-14 06:52:06,891 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-14 06:52:06,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:52:06,891 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:52:06,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [29527818] [2022-07-14 06:52:06,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [29527818] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:52:06,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:52:06,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:52:06,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330487332] [2022-07-14 06:52:06,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:52:06,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:52:06,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:52:06,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:52:06,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:52:06,893 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) [2022-07-14 06:52:07,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:52:07,689 INFO L93 Difference]: Finished difference Result 161 states and 171 transitions. [2022-07-14 06:52:07,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:52:07,690 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 [2022-07-14 06:52:07,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:52:07,691 INFO L225 Difference]: With dead ends: 161 [2022-07-14 06:52:07,691 INFO L226 Difference]: Without dead ends: 161 [2022-07-14 06:52:07,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:52:07,691 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 107 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-07-14 06:52:07,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 319 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-14 06:52:07,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-14 06:52:07,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 143. [2022-07-14 06:52:07,694 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) [2022-07-14 06:52:07,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 152 transitions. [2022-07-14 06:52:07,695 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 152 transitions. Word has length 51 [2022-07-14 06:52:07,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:52:07,695 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 152 transitions. [2022-07-14 06:52:07,695 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) [2022-07-14 06:52:07,695 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 152 transitions. [2022-07-14 06:52:07,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-14 06:52:07,695 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:52:07,696 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] [2022-07-14 06:52:07,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-07-14 06:52:07,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:52:07,896 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)] === [2022-07-14 06:52:07,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:52:07,897 INFO L85 PathProgramCache]: Analyzing trace with hash 309195282, now seen corresponding path program 1 times [2022-07-14 06:52:07,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:52:07,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181548377] [2022-07-14 06:52:07,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:52:07,897 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:52:07,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:52:07,898 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) [2022-07-14 06:52:07,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-14 06:52:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:52:08,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 06:52:08,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:52:08,135 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 [2022-07-14 06:52:08,243 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-14 06:52:08,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:52:08,244 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:52:08,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181548377] [2022-07-14 06:52:08,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181548377] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:52:08,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:52:08,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:52:08,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105168735] [2022-07-14 06:52:08,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:52:08,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:52:08,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:52:08,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:52:08,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:52:08,245 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) [2022-07-14 06:52:08,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:52:08,840 INFO L93 Difference]: Finished difference Result 137 states and 146 transitions. [2022-07-14 06:52:08,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:52:08,841 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 [2022-07-14 06:52:08,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:52:08,842 INFO L225 Difference]: With dead ends: 137 [2022-07-14 06:52:08,842 INFO L226 Difference]: Without dead ends: 137 [2022-07-14 06:52:08,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:52:08,843 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 105 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:52:08,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 330 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-14 06:52:08,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-14 06:52:08,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-07-14 06:52:08,845 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) [2022-07-14 06:52:08,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 146 transitions. [2022-07-14 06:52:08,846 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 146 transitions. Word has length 51 [2022-07-14 06:52:08,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:52:08,846 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 146 transitions. [2022-07-14 06:52:08,847 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) [2022-07-14 06:52:08,847 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 146 transitions. [2022-07-14 06:52:08,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-14 06:52:08,847 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:52:08,848 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] [2022-07-14 06:52:08,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-07-14 06:52:09,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:52:09,065 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)] === [2022-07-14 06:52:09,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:52:09,065 INFO L85 PathProgramCache]: Analyzing trace with hash 783922964, now seen corresponding path program 1 times [2022-07-14 06:52:09,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:52:09,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465662933] [2022-07-14 06:52:09,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:52:09,066 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:52:09,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:52:09,067 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) [2022-07-14 06:52:09,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-14 06:52:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:52:09,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-14 06:52:09,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:52:09,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:52:09,495 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 [2022-07-14 06:52:09,673 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:52:09,674 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 [2022-07-14 06:52:09,809 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 [2022-07-14 06:52:10,276 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-14 06:52:10,276 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 [2022-07-14 06:52:10,635 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 [2022-07-14 06:52:10,846 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 [2022-07-14 06:52:11,230 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:52:11,230 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 [2022-07-14 06:52:11,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:52:11,378 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 [2022-07-14 06:52:11,744 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-14 06:52:11,744 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 [2022-07-14 06:52:11,751 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 [2022-07-14 06:52:11,765 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 [2022-07-14 06:52:12,274 WARN L855 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (select |c_old(#valid)| |c_node_create_~temp~0#1.base|)) (exists ((v_ArrVal_2244 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_node_create_~temp~0#1.base| v_ArrVal_2244))) (not (= |c_#StackHeapBarrier| (_ bv4294967295 32))) (exists ((v_ArrVal_2245 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| v_ArrVal_2245))) (bvult |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_2241 (_ BitVec 1))) (= (store |c_old(#valid)| |c_node_create_~temp~0#1.base| v_ArrVal_2241) |c_#valid|)) (exists ((v_arrayElimCell_85 (_ BitVec 32)) (v_arrayElimIndex_2 (_ BitVec 32))) (and (not (= v_arrayElimCell_85 v_arrayElimIndex_2)) (bvult v_arrayElimIndex_2 |c_#StackHeapBarrier|) (not (= v_arrayElimIndex_2 (_ bv0 32))) (bvult v_arrayElimCell_85 |c_#StackHeapBarrier|) (not (= v_arrayElimIndex_2 (_ bv1 32))) (not (= v_arrayElimCell_85 (_ bv0 32))) (not (= v_arrayElimCell_85 (_ bv1 32))))) (not (= (_ bv0 32) |c_node_create_~temp~0#1.base|))) is different from true [2022-07-14 06:52:12,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:52:12,641 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-14 06:52:12,642 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 [2022-07-14 06:52:12,742 INFO L356 Elim1Store]: treesize reduction 81, result has 43.0 percent of original size [2022-07-14 06:52:12,742 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 [2022-07-14 06:52:12,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:52:12,767 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 [2022-07-14 06:52:13,247 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 [2022-07-14 06:52:14,120 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-14 06:52:14,120 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 [2022-07-14 06:52:15,853 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-14 06:52:15,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:52:16,438 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:52:16,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1465662933] [2022-07-14 06:52:16,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1465662933] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:52:16,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [640442392] [2022-07-14 06:52:16,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:52:16,438 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:52:16,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:52:16,439 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) [2022-07-14 06:52:16,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-07-14 06:52:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:52:17,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-14 06:52:17,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:52:17,341 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 [2022-07-14 06:52:18,354 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:52:18,355 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 20 treesize of output 27 [2022-07-14 06:52:18,775 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 [2022-07-14 06:52:19,050 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 [2022-07-14 06:52:19,495 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:52:19,495 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 [2022-07-14 06:52:19,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:52:19,675 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 33 treesize of output 28 [2022-07-14 06:52:20,054 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:52:20,054 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 44 treesize of output 27 [2022-07-14 06:52:20,060 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 16 treesize of output 12 [2022-07-14 06:52:20,067 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 [2022-07-14 06:52:21,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:52:21,011 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 [2022-07-14 06:52:21,069 INFO L356 Elim1Store]: treesize reduction 66, result has 42.6 percent of original size [2022-07-14 06:52:21,070 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 39 treesize of output 68 [2022-07-14 06:52:21,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:52:21,103 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-14 06:52:21,104 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 70 treesize of output 60 [2022-07-14 06:52:21,378 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 [2022-07-14 06:52:21,886 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:52:21,886 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 75 treesize of output 38 [2022-07-14 06:52:22,657 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:52:22,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:52:23,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [640442392] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:52:23,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:52:23,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 55 [2022-07-14 06:52:23,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174126304] [2022-07-14 06:52:23,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:52:23,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-14 06:52:23,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:52:23,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-14 06:52:23,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=3512, Unknown=21, NotChecked=120, Total=3906 [2022-07-14 06:52:23,151 INFO L87 Difference]: Start difference. First operand 137 states and 146 transitions. Second operand has 56 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 46 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) [2022-07-14 06:52:31,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:52:31,628 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2022-07-14 06:52:31,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-14 06:52:31,629 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 46 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 [2022-07-14 06:52:31,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:52:31,630 INFO L225 Difference]: With dead ends: 144 [2022-07-14 06:52:31,630 INFO L226 Difference]: Without dead ends: 144 [2022-07-14 06:52:31,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 71 SyntacticMatches, 6 SemanticMatches, 88 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2728 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=543, Invalid=7252, Unknown=41, NotChecked=174, Total=8010 [2022-07-14 06:52:31,633 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 34 mSDsluCounter, 1615 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1724 SdHoareTripleChecker+Invalid, 2004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 906 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:52:31,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1724 Invalid, 2004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1061 Invalid, 0 Unknown, 906 Unchecked, 2.3s Time] [2022-07-14 06:52:31,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-14 06:52:31,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-07-14 06:52:31,636 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) [2022-07-14 06:52:31,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 152 transitions. [2022-07-14 06:52:31,637 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 152 transitions. Word has length 53 [2022-07-14 06:52:31,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:52:31,637 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 152 transitions. [2022-07-14 06:52:31,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 46 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) [2022-07-14 06:52:31,637 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 152 transitions. [2022-07-14 06:52:31,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-14 06:52:31,638 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:52:31,638 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] [2022-07-14 06:52:31,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-14 06:52:31,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-07-14 06:52:32,051 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 [2022-07-14 06:52:32,052 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)] === [2022-07-14 06:52:32,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:52:32,052 INFO L85 PathProgramCache]: Analyzing trace with hash 783922965, now seen corresponding path program 1 times [2022-07-14 06:52:32,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:52:32,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227735532] [2022-07-14 06:52:32,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:52:32,053 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:52:32,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:52:32,054 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) [2022-07-14 06:52:32,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-14 06:52:32,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:52:32,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 90 conjunts are in the unsatisfiable core [2022-07-14 06:52:32,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:52:32,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:52:32,500 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 [2022-07-14 06:52:32,535 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 [2022-07-14 06:52:32,742 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:52:32,743 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 [2022-07-14 06:52:32,920 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 [2022-07-14 06:52:32,926 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 [2022-07-14 06:52:33,344 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-14 06:52:33,345 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 [2022-07-14 06:52:33,403 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 [2022-07-14 06:52:33,764 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 [2022-07-14 06:52:33,824 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 [2022-07-14 06:52:34,061 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 [2022-07-14 06:52:34,093 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 [2022-07-14 06:52:34,534 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:52:34,534 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 72 treesize of output 63 [2022-07-14 06:52:34,542 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 [2022-07-14 06:52:34,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:52:34,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 44 [2022-07-14 06:52:34,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:52:34,768 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 [2022-07-14 06:52:35,182 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-14 06:52:35,182 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 126 treesize of output 57 [2022-07-14 06:52:35,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:52:35,196 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 [2022-07-14 06:52:35,205 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 23 treesize of output 17 [2022-07-14 06:52:35,219 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 [2022-07-14 06:52:36,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:52:36,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:52:36,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:52:36,268 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 [2022-07-14 06:52:36,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:52:36,318 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-14 06:52:36,318 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 132 treesize of output 98 [2022-07-14 06:52:36,393 INFO L356 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2022-07-14 06:52:36,393 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 40 treesize of output 44 [2022-07-14 06:52:36,422 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 [2022-07-14 06:52:37,942 INFO L356 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2022-07-14 06:52:37,942 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 [2022-07-14 06:52:37,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:52:37,986 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-14 06:52:37,986 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 [2022-07-14 06:52:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:52:39,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:52:40,652 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:52:40,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227735532] [2022-07-14 06:52:40,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1227735532] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:52:40,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1888417063] [2022-07-14 06:52:40,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:52:40,653 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:52:40,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:52:40,654 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) [2022-07-14 06:52:40,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-07-14 06:52:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:52:41,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-14 06:52:41,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:52:41,533 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 [2022-07-14 06:52:41,539 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 [2022-07-14 06:52:42,700 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:52:42,701 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 20 treesize of output 27 [2022-07-14 06:52:42,731 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 [2022-07-14 06:52:43,235 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 [2022-07-14 06:52:43,249 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 [2022-07-14 06:52:43,620 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 [2022-07-14 06:52:43,638 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 [2022-07-14 06:52:44,193 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:52:44,194 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 49 treesize of output 46 [2022-07-14 06:52:44,200 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 [2022-07-14 06:52:44,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:52:44,432 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 42 treesize of output 33 [2022-07-14 06:52:44,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:52:44,458 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 [2022-07-14 06:52:44,917 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:52:44,917 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 68 treesize of output 39 [2022-07-14 06:52:44,929 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 16 treesize of output 12 [2022-07-14 06:52:44,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-14 06:52:44,945 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 [2022-07-14 06:52:45,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:52:45,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:52:45,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:52:45,927 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 [2022-07-14 06:52:45,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:52:45,957 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-14 06:52:45,957 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 74 treesize of output 64 [2022-07-14 06:52:45,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:52:45,969 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 [2022-07-14 06:52:45,999 INFO L356 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-07-14 06:52:45,999 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 33 treesize of output 35 [2022-07-14 06:52:46,816 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-14 06:52:46,817 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 [2022-07-14 06:52:46,841 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-14 06:52:46,841 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 [2022-07-14 06:52:47,245 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:52:47,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:52:48,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1888417063] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:52:48,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:52:48,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2022-07-14 06:52:48,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958464301] [2022-07-14 06:52:48,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:52:48,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-14 06:52:48,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:52:48,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-14 06:52:48,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=3498, Unknown=49, NotChecked=0, Total=3782 [2022-07-14 06:52:48,075 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) [2022-07-14 06:52:56,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:52:56,524 INFO L93 Difference]: Finished difference Result 143 states and 151 transitions. [2022-07-14 06:52:56,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-14 06:52:56,525 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 [2022-07-14 06:52:56,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:52:56,526 INFO L225 Difference]: With dead ends: 143 [2022-07-14 06:52:56,526 INFO L226 Difference]: Without dead ends: 143 [2022-07-14 06:52:56,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2467 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=548, Invalid=7725, Unknown=99, NotChecked=0, Total=8372 [2022-07-14 06:52:56,528 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 39 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 675 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:52:56,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 1239 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 466 Invalid, 0 Unknown, 675 Unchecked, 1.1s Time] [2022-07-14 06:52:56,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-14 06:52:56,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-07-14 06:52:56,530 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) [2022-07-14 06:52:56,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 151 transitions. [2022-07-14 06:52:56,531 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 151 transitions. Word has length 53 [2022-07-14 06:52:56,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:52:56,531 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 151 transitions. [2022-07-14 06:52:56,531 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) [2022-07-14 06:52:56,531 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 151 transitions. [2022-07-14 06:52:56,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-14 06:52:56,532 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:52:56,532 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] [2022-07-14 06:52:56,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-14 06:52:56,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2022-07-14 06:52:56,932 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 [2022-07-14 06:52:56,933 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)] === [2022-07-14 06:52:56,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:52:56,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1730694709, now seen corresponding path program 1 times [2022-07-14 06:52:56,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:52:56,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677992475] [2022-07-14 06:52:56,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:52:56,934 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:52:56,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:52:56,935 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) [2022-07-14 06:52:56,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-14 06:52:57,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:52:57,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:52:57,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:52:57,238 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-14 06:52:57,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:52:57,238 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:52:57,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677992475] [2022-07-14 06:52:57,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677992475] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:52:57,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:52:57,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:52:57,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093074862] [2022-07-14 06:52:57,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:52:57,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:52:57,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:52:57,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:52:57,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:52:57,239 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) [2022-07-14 06:52:57,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:52:57,511 INFO L93 Difference]: Finished difference Result 157 states and 166 transitions. [2022-07-14 06:52:57,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:52:57,512 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 [2022-07-14 06:52:57,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:52:57,512 INFO L225 Difference]: With dead ends: 157 [2022-07-14 06:52:57,512 INFO L226 Difference]: Without dead ends: 157 [2022-07-14 06:52:57,513 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 [2022-07-14 06:52:57,513 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, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:52:57,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 134 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:52:57,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-07-14 06:52:57,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 139. [2022-07-14 06:52:57,516 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) [2022-07-14 06:52:57,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 147 transitions. [2022-07-14 06:52:57,516 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 147 transitions. Word has length 55 [2022-07-14 06:52:57,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:52:57,516 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 147 transitions. [2022-07-14 06:52:57,516 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) [2022-07-14 06:52:57,516 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 147 transitions. [2022-07-14 06:52:57,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-14 06:52:57,517 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:52:57,517 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] [2022-07-14 06:52:57,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-07-14 06:52:57,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:52:57,718 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)] === [2022-07-14 06:52:57,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:52:57,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1730694710, now seen corresponding path program 1 times [2022-07-14 06:52:57,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:52:57,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1570301893] [2022-07-14 06:52:57,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:52:57,719 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:52:57,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:52:57,720 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) [2022-07-14 06:52:57,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-14 06:52:57,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:52:57,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 06:52:57,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:52:58,148 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-14 06:52:58,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:52:58,148 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:52:58,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1570301893] [2022-07-14 06:52:58,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1570301893] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:52:58,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:52:58,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:52:58,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519099357] [2022-07-14 06:52:58,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:52:58,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:52:58,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:52:58,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:52:58,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:52:58,150 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) [2022-07-14 06:52:58,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:52:58,439 INFO L93 Difference]: Finished difference Result 135 states and 143 transitions. [2022-07-14 06:52:58,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:52:58,439 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 [2022-07-14 06:52:58,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:52:58,440 INFO L225 Difference]: With dead ends: 135 [2022-07-14 06:52:58,440 INFO L226 Difference]: Without dead ends: 135 [2022-07-14 06:52:58,440 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 [2022-07-14 06:52:58,441 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 200 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:52:58,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 124 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:52:58,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-14 06:52:58,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-07-14 06:52:58,443 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) [2022-07-14 06:52:58,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 143 transitions. [2022-07-14 06:52:58,444 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 143 transitions. Word has length 55 [2022-07-14 06:52:58,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:52:58,444 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 143 transitions. [2022-07-14 06:52:58,444 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) [2022-07-14 06:52:58,444 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 143 transitions. [2022-07-14 06:52:58,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-14 06:52:58,445 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:52:58,445 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] [2022-07-14 06:52:58,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-07-14 06:52:58,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:52:58,646 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)] === [2022-07-14 06:52:58,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:52:58,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1045275033, now seen corresponding path program 1 times [2022-07-14 06:52:58,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:52:58,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853902003] [2022-07-14 06:52:58,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:52:58,647 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:52:58,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:52:58,648 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) [2022-07-14 06:52:58,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-07-14 06:52:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:52:59,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-14 06:52:59,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:52:59,227 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 [2022-07-14 06:52:59,233 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 [2022-07-14 06:52:59,258 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 [2022-07-14 06:52:59,263 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 [2022-07-14 06:53:01,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:53:01,408 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 [2022-07-14 06:53:01,437 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:53:01,437 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 [2022-07-14 06:53:01,515 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 [2022-07-14 06:53:03,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:53:03,751 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 [2022-07-14 06:53:04,244 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 [2022-07-14 06:53:04,249 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 [2022-07-14 06:53:04,254 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 [2022-07-14 06:53:06,310 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 [2022-07-14 06:53:06,841 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:53:06,841 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 [2022-07-14 06:53:06,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:53:06,870 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 [2022-07-14 06:53:06,918 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:53:06,918 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 [2022-07-14 06:53:06,924 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 [2022-07-14 06:53:07,843 INFO L356 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2022-07-14 06:53:07,843 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 [2022-07-14 06:53:08,253 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:53:08,253 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 [2022-07-14 06:53:08,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:53:08,400 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 [2022-07-14 06:53:08,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:53:08,447 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 [2022-07-14 06:53:08,521 INFO L356 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2022-07-14 06:53:08,521 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 [2022-07-14 06:53:08,550 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:53:08,550 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 [2022-07-14 06:53:10,424 INFO L356 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2022-07-14 06:53:10,424 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2022-07-14 06:53:10,710 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:53:10,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:53:14,213 INFO L356 Elim1Store]: treesize reduction 5, result has 93.9 percent of original size [2022-07-14 06:53:14,214 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 [2022-07-14 06:53:14,747 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:53:14,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853902003] [2022-07-14 06:53:14,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853902003] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:53:14,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1657401658] [2022-07-14 06:53:14,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:53:14,747 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:53:14,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:53:14,749 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) [2022-07-14 06:53:14,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-07-14 06:53:15,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:53:15,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-14 06:53:15,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:53:15,417 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 [2022-07-14 06:53:15,424 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 [2022-07-14 06:53:15,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:53:15,677 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 [2022-07-14 06:53:15,840 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 [2022-07-14 06:53:18,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:53:18,088 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 [2022-07-14 06:53:18,714 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 [2022-07-14 06:53:18,718 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 [2022-07-14 06:53:20,851 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 [2022-07-14 06:53:21,893 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:53:21,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-14 06:53:21,919 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:53:21,919 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 [2022-07-14 06:53:21,925 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 [2022-07-14 06:53:22,554 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 [2022-07-14 06:53:23,998 INFO L356 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2022-07-14 06:53:23,998 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 [2022-07-14 06:53:24,455 INFO L356 Elim1Store]: treesize reduction 30, result has 63.4 percent of original size [2022-07-14 06:53:24,455 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 [2022-07-14 06:53:24,652 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 [2022-07-14 06:53:24,683 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 [2022-07-14 06:53:25,429 INFO L356 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-07-14 06:53:25,430 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 [2022-07-14 06:53:25,497 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 22 treesize of output 18 [2022-07-14 06:53:25,507 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 [2022-07-14 06:53:25,922 INFO L356 Elim1Store]: treesize reduction 46, result has 41.8 percent of original size [2022-07-14 06:53:25,922 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 [2022-07-14 06:53:25,949 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:53:25,950 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 [2022-07-14 06:53:33,508 INFO L356 Elim1Store]: treesize reduction 6, result has 79.3 percent of original size [2022-07-14 06:53:33,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 76 treesize of output 62 [2022-07-14 06:53:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:53:34,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:53:58,126 INFO L356 Elim1Store]: treesize reduction 19, result has 72.5 percent of original size [2022-07-14 06:53:58,127 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 [2022-07-14 06:53:58,236 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:53:58,236 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 [2022-07-14 06:53:58,250 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 174 treesize of output 166 [2022-07-14 06:54:10,634 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 6 treesize of output 4 [2022-07-14 06:54:10,832 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:54:10,833 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 29 treesize of output 33 [2022-07-14 06:54:10,877 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 [2022-07-14 06:54:11,116 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:54:11,116 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 164 treesize of output 180