./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6c24879c 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/array-memsafety/strreplace-alloca-2.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 961e7f6fbd61acd9d4f1771460dcf26fd486b3de35e5e0e3ca8e6e03bda0fabc --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:27:15,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:27:15,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:27:15,465 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:27:15,466 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:27:15,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:27:15,483 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:27:15,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:27:15,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:27:15,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:27:15,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:27:15,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:27:15,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:27:15,494 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:27:15,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:27:15,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:27:15,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:27:15,499 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:27:15,501 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:27:15,506 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:27:15,507 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:27:15,508 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:27:15,509 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:27:15,511 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:27:15,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:27:15,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:27:15,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:27:15,517 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:27:15,517 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:27:15,518 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:27:15,518 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:27:15,518 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:27:15,519 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:27:15,519 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:27:15,520 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:27:15,520 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:27:15,521 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:27:15,521 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:27:15,521 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:27:15,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:27:15,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:27:15,523 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:27:15,523 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-12 18:27:15,547 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:27:15,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:27:15,547 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:27:15,547 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:27:15,548 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:27:15,548 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:27:15,549 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:27:15,549 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:27:15,549 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:27:15,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:27:15,550 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:27:15,550 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:27:15,550 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:27:15,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:27:15,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:27:15,550 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:27:15,550 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:27:15,551 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:27:15,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:27:15,551 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:27:15,551 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:27:15,551 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:27:15,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:27:15,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:27:15,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:27:15,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:27:15,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:27:15,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:27:15,552 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 18:27:15,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 18:27:15,553 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 961e7f6fbd61acd9d4f1771460dcf26fd486b3de35e5e0e3ca8e6e03bda0fabc [2022-07-12 18:27:15,735 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:27:15,749 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:27:15,751 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:27:15,752 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:27:15,752 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:27:15,753 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2022-07-12 18:27:15,798 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7518cf413/bf870e0b3b5349f0b1679cc25157c7fe/FLAG9e78e35f0 [2022-07-12 18:27:16,224 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:27:16,225 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2022-07-12 18:27:16,237 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7518cf413/bf870e0b3b5349f0b1679cc25157c7fe/FLAG9e78e35f0 [2022-07-12 18:27:16,618 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7518cf413/bf870e0b3b5349f0b1679cc25157c7fe [2022-07-12 18:27:16,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:27:16,620 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:27:16,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:27:16,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:27:16,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:27:16,624 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:27:16" (1/1) ... [2022-07-12 18:27:16,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@614bcda9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:27:16, skipping insertion in model container [2022-07-12 18:27:16,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:27:16" (1/1) ... [2022-07-12 18:27:16,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:27:16,663 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:27:16,900 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:27:16,905 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 18:27:16,926 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:27:16,946 INFO L208 MainTranslator]: Completed translation [2022-07-12 18:27:16,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:27:16 WrapperNode [2022-07-12 18:27:16,946 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:27:16,947 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 18:27:16,947 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 18:27:16,947 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 18:27:16,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:27:16" (1/1) ... [2022-07-12 18:27:16,960 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:27:16" (1/1) ... [2022-07-12 18:27:16,987 INFO L137 Inliner]: procedures = 117, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2022-07-12 18:27:16,988 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 18:27:16,988 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 18:27:16,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 18:27:16,988 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 18:27:16,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:27:16" (1/1) ... [2022-07-12 18:27:16,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:27:16" (1/1) ... [2022-07-12 18:27:16,995 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:27:16" (1/1) ... [2022-07-12 18:27:16,995 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:27:16" (1/1) ... [2022-07-12 18:27:17,006 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:27:16" (1/1) ... [2022-07-12 18:27:17,009 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:27:16" (1/1) ... [2022-07-12 18:27:17,016 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:27:16" (1/1) ... [2022-07-12 18:27:17,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 18:27:17,017 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 18:27:17,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 18:27:17,022 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 18:27:17,023 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:27:16" (1/1) ... [2022-07-12 18:27:17,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:27:17,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:27:17,043 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) [2022-07-12 18:27:17,052 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 [2022-07-12 18:27:17,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 18:27:17,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 18:27:17,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 18:27:17,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 18:27:17,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 18:27:17,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 18:27:17,138 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 18:27:17,139 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 18:27:17,248 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 18:27:17,252 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 18:27:17,252 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 18:27:17,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:27:17 BoogieIcfgContainer [2022-07-12 18:27:17,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 18:27:17,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 18:27:17,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 18:27:17,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 18:27:17,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:27:16" (1/3) ... [2022-07-12 18:27:17,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b80c5aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:27:17, skipping insertion in model container [2022-07-12 18:27:17,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:27:16" (2/3) ... [2022-07-12 18:27:17,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b80c5aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:27:17, skipping insertion in model container [2022-07-12 18:27:17,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:27:17" (3/3) ... [2022-07-12 18:27:17,259 INFO L111 eAbstractionObserver]: Analyzing ICFG strreplace-alloca-2.i [2022-07-12 18:27:17,268 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 18:27:17,268 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2022-07-12 18:27:17,293 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 18:27:17,298 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@17dc4f3a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@15fa2a00 [2022-07-12 18:27:17,298 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-07-12 18:27:17,304 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:17,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 18:27:17,323 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:17,324 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 18:27:17,324 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:17,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:17,328 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2022-07-12 18:27:17,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:17,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336290118] [2022-07-12 18:27:17,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:17,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:17,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:17,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:17,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:17,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336290118] [2022-07-12 18:27:17,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336290118] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:27:17,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:27:17,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:27:17,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791873471] [2022-07-12 18:27:17,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:27:17,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:27:17,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:17,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:27:17,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:27:17,476 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:17,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:17,517 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-07-12 18:27:17,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:27:17,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-12 18:27:17,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:17,527 INFO L225 Difference]: With dead ends: 58 [2022-07-12 18:27:17,527 INFO L226 Difference]: Without dead ends: 54 [2022-07-12 18:27:17,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:27:17,534 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 51 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:17,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 60 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:27:17,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-12 18:27:17,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 33. [2022-07-12 18:27:17,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:17,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-07-12 18:27:17,564 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 6 [2022-07-12 18:27:17,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:17,564 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-07-12 18:27:17,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:17,564 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-07-12 18:27:17,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 18:27:17,565 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:17,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 18:27:17,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 18:27:17,566 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:17,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:17,567 INFO L85 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2022-07-12 18:27:17,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:17,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526072607] [2022-07-12 18:27:17,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:17,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:17,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:17,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526072607] [2022-07-12 18:27:17,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526072607] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:27:17,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:27:17,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:27:17,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502248546] [2022-07-12 18:27:17,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:27:17,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:27:17,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:17,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:27:17,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:27:17,605 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:17,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:17,623 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2022-07-12 18:27:17,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:27:17,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-12 18:27:17,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:17,624 INFO L225 Difference]: With dead ends: 31 [2022-07-12 18:27:17,624 INFO L226 Difference]: Without dead ends: 31 [2022-07-12 18:27:17,625 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 [2022-07-12 18:27:17,625 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:17,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 22 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:27:17,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-12 18:27:17,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-07-12 18:27:17,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:17,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-07-12 18:27:17,629 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 6 [2022-07-12 18:27:17,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:17,629 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-07-12 18:27:17,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:17,630 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-07-12 18:27:17,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 18:27:17,630 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:17,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 18:27:17,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 18:27:17,630 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:17,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:17,631 INFO L85 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2022-07-12 18:27:17,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:17,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466916277] [2022-07-12 18:27:17,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:17,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:17,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:17,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:17,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466916277] [2022-07-12 18:27:17,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466916277] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:27:17,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:27:17,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:27:17,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369237524] [2022-07-12 18:27:17,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:27:17,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:27:17,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:17,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:27:17,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:27:17,673 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:17,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:17,692 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-07-12 18:27:17,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:27:17,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-12 18:27:17,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:17,693 INFO L225 Difference]: With dead ends: 30 [2022-07-12 18:27:17,693 INFO L226 Difference]: Without dead ends: 30 [2022-07-12 18:27:17,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:27:17,694 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:17,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 20 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:27:17,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-12 18:27:17,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-12 18:27:17,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.5) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:17,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-07-12 18:27:17,697 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 6 [2022-07-12 18:27:17,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:17,697 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-07-12 18:27:17,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:17,698 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-07-12 18:27:17,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 18:27:17,698 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:17,698 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 18:27:17,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 18:27:17,699 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:17,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:17,699 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2022-07-12 18:27:17,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:17,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561121529] [2022-07-12 18:27:17,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:17,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:17,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:17,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561121529] [2022-07-12 18:27:17,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561121529] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:27:17,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:27:17,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:27:17,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916973039] [2022-07-12 18:27:17,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:27:17,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:27:17,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:17,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:27:17,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:27:17,733 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:17,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:17,771 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2022-07-12 18:27:17,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:27:17,772 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-12 18:27:17,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:17,772 INFO L225 Difference]: With dead ends: 53 [2022-07-12 18:27:17,772 INFO L226 Difference]: Without dead ends: 53 [2022-07-12 18:27:17,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:27:17,773 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 74 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:17,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 35 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:27:17,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-12 18:27:17,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2022-07-12 18:27:17,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.5) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:17,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-07-12 18:27:17,777 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2022-07-12 18:27:17,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:17,777 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-07-12 18:27:17,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:17,777 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-07-12 18:27:17,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 18:27:17,778 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:17,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:17,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 18:27:17,778 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:17,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:17,779 INFO L85 PathProgramCache]: Analyzing trace with hash 119484121, now seen corresponding path program 1 times [2022-07-12 18:27:17,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:17,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566269514] [2022-07-12 18:27:17,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:17,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:17,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:17,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:17,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566269514] [2022-07-12 18:27:17,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566269514] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:27:17,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:27:17,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:27:17,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731629295] [2022-07-12 18:27:17,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:27:17,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:27:17,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:17,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:27:17,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:27:17,811 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:17,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:17,836 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-07-12 18:27:17,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:27:17,836 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-12 18:27:17,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:17,839 INFO L225 Difference]: With dead ends: 29 [2022-07-12 18:27:17,839 INFO L226 Difference]: Without dead ends: 29 [2022-07-12 18:27:17,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:27:17,843 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:17,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 24 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:27:17,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-12 18:27:17,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-07-12 18:27:17,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.375) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:17,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-07-12 18:27:17,846 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 8 [2022-07-12 18:27:17,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:17,846 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-07-12 18:27:17,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:17,846 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-07-12 18:27:17,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 18:27:17,847 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:17,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:17,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 18:27:17,849 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:17,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:17,849 INFO L85 PathProgramCache]: Analyzing trace with hash 119484122, now seen corresponding path program 1 times [2022-07-12 18:27:17,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:17,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893707399] [2022-07-12 18:27:17,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:17,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:17,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:17,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:17,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:17,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893707399] [2022-07-12 18:27:17,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893707399] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:27:17,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:27:17,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:27:17,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571717187] [2022-07-12 18:27:17,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:27:17,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:27:17,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:17,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:27:17,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:27:17,898 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:17,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:17,935 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-07-12 18:27:17,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:27:17,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-12 18:27:17,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:17,936 INFO L225 Difference]: With dead ends: 40 [2022-07-12 18:27:17,936 INFO L226 Difference]: Without dead ends: 40 [2022-07-12 18:27:17,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:27:17,937 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 78 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:17,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 32 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:27:17,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-12 18:27:17,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2022-07-12 18:27:17,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:17,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-07-12 18:27:17,940 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 8 [2022-07-12 18:27:17,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:17,940 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-07-12 18:27:17,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:17,941 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-07-12 18:27:17,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 18:27:17,941 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:17,941 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:17,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 18:27:17,941 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:17,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:17,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2022-07-12 18:27:17,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:17,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094825322] [2022-07-12 18:27:17,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:17,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:17,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:17,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:17,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094825322] [2022-07-12 18:27:17,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094825322] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:27:17,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220386286] [2022-07-12 18:27:17,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:17,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:17,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:27:17,994 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) [2022-07-12 18:27:17,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 18:27:18,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:18,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 18:27:18,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:18,124 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 [2022-07-12 18:27:18,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:18,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:27:18,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:18,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220386286] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:27:18,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:27:18,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-07-12 18:27:18,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637731696] [2022-07-12 18:27:18,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:27:18,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:27:18,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:18,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:27:18,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:27:18,349 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:18,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:18,472 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2022-07-12 18:27:18,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:27:18,474 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-12 18:27:18,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:18,475 INFO L225 Difference]: With dead ends: 78 [2022-07-12 18:27:18,475 INFO L226 Difference]: Without dead ends: 78 [2022-07-12 18:27:18,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:27:18,476 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 98 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:18,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 107 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:27:18,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-12 18:27:18,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 31. [2022-07-12 18:27:18,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:18,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-07-12 18:27:18,490 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 10 [2022-07-12 18:27:18,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:18,490 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-07-12 18:27:18,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:18,491 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-07-12 18:27:18,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 18:27:18,491 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:18,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:18,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-12 18:27:18,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:18,727 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:18,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:18,728 INFO L85 PathProgramCache]: Analyzing trace with hash -204531026, now seen corresponding path program 1 times [2022-07-12 18:27:18,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:18,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809999137] [2022-07-12 18:27:18,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:18,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:18,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:18,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:18,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:18,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809999137] [2022-07-12 18:27:18,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809999137] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:27:18,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:27:18,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:27:18,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439061950] [2022-07-12 18:27:18,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:27:18,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:27:18,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:18,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:27:18,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:27:18,769 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:18,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:18,779 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-07-12 18:27:18,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:27:18,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-12 18:27:18,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:18,780 INFO L225 Difference]: With dead ends: 30 [2022-07-12 18:27:18,780 INFO L226 Difference]: Without dead ends: 27 [2022-07-12 18:27:18,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:27:18,781 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 15 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:18,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:27:18,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-12 18:27:18,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-12 18:27:18,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:18,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-07-12 18:27:18,783 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 12 [2022-07-12 18:27:18,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:18,784 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-07-12 18:27:18,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:18,784 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-07-12 18:27:18,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-12 18:27:18,784 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:18,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:18,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 18:27:18,785 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:18,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:18,785 INFO L85 PathProgramCache]: Analyzing trace with hash -2044161814, now seen corresponding path program 1 times [2022-07-12 18:27:18,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:18,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051281760] [2022-07-12 18:27:18,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:18,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:18,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:18,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051281760] [2022-07-12 18:27:18,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051281760] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:27:18,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:27:18,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 18:27:18,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131466134] [2022-07-12 18:27:18,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:27:18,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:27:18,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:18,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:27:18,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:27:18,870 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:18,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:18,924 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2022-07-12 18:27:18,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:27:18,924 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-12 18:27:18,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:18,925 INFO L225 Difference]: With dead ends: 31 [2022-07-12 18:27:18,925 INFO L226 Difference]: Without dead ends: 25 [2022-07-12 18:27:18,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:27:18,926 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:18,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 90 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:27:18,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-12 18:27:18,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-07-12 18:27:18,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:18,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-07-12 18:27:18,928 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 13 [2022-07-12 18:27:18,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:18,928 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-07-12 18:27:18,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:18,928 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-07-12 18:27:18,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-12 18:27:18,929 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:18,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:18,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 18:27:18,929 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:18,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:18,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1343097236, now seen corresponding path program 1 times [2022-07-12 18:27:18,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:18,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586783181] [2022-07-12 18:27:18,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:18,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:18,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:19,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:19,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:19,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586783181] [2022-07-12 18:27:19,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586783181] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:27:19,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:27:19,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 18:27:19,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343833348] [2022-07-12 18:27:19,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:27:19,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:27:19,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:19,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:27:19,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:27:19,013 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:19,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:19,072 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-07-12 18:27:19,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:27:19,073 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-12 18:27:19,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:19,073 INFO L225 Difference]: With dead ends: 33 [2022-07-12 18:27:19,073 INFO L226 Difference]: Without dead ends: 29 [2022-07-12 18:27:19,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:27:19,074 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:19,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 72 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:27:19,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-12 18:27:19,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2022-07-12 18:27:19,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:19,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-07-12 18:27:19,076 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 13 [2022-07-12 18:27:19,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:19,076 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-07-12 18:27:19,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:19,076 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-07-12 18:27:19,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-12 18:27:19,077 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:19,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:19,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 18:27:19,077 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:19,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:19,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1914076215, now seen corresponding path program 1 times [2022-07-12 18:27:19,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:19,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252673611] [2022-07-12 18:27:19,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:19,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:19,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:19,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:19,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:19,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252673611] [2022-07-12 18:27:19,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252673611] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:27:19,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941619586] [2022-07-12 18:27:19,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:19,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:19,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:27:19,142 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) [2022-07-12 18:27:19,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 18:27:19,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:19,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 18:27:19,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:19,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:27:19,339 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 [2022-07-12 18:27:19,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:19,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941619586] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:27:19,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:27:19,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-07-12 18:27:19,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386159362] [2022-07-12 18:27:19,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:27:19,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 18:27:19,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:19,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 18:27:19,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-07-12 18:27:19,363 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:19,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:19,470 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-07-12 18:27:19,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:27:19,471 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-12 18:27:19,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:19,472 INFO L225 Difference]: With dead ends: 36 [2022-07-12 18:27:19,472 INFO L226 Difference]: Without dead ends: 36 [2022-07-12 18:27:19,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-07-12 18:27:19,472 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 124 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:19,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 73 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:27:19,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-12 18:27:19,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2022-07-12 18:27:19,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:19,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-07-12 18:27:19,476 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2022-07-12 18:27:19,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:19,476 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-07-12 18:27:19,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:19,477 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-07-12 18:27:19,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-12 18:27:19,477 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:19,477 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:19,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-12 18:27:19,691 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,SelfDestructingSolverStorable10 [2022-07-12 18:27:19,692 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:19,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:19,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1668744869, now seen corresponding path program 2 times [2022-07-12 18:27:19,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:19,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328884608] [2022-07-12 18:27:19,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:19,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:19,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:19,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328884608] [2022-07-12 18:27:19,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328884608] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:27:19,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816816450] [2022-07-12 18:27:19,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:27:19,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:19,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:27:19,820 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) [2022-07-12 18:27:19,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 18:27:19,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:27:19,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:27:19,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-12 18:27:19,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:19,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:27:20,120 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:27:20,120 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-12 18:27:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:20,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:27:20,411 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 13 [2022-07-12 18:27:20,415 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 16 treesize of output 12 [2022-07-12 18:27:20,420 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 26 treesize of output 22 [2022-07-12 18:27:20,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:20,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816816450] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:27:20,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:27:20,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-07-12 18:27:20,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950301457] [2022-07-12 18:27:20,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:27:20,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-12 18:27:20,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:20,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-12 18:27:20,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-07-12 18:27:20,435 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:20,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:20,788 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2022-07-12 18:27:20,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 18:27:20,789 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-12 18:27:20,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:20,790 INFO L225 Difference]: With dead ends: 52 [2022-07-12 18:27:20,790 INFO L226 Difference]: Without dead ends: 49 [2022-07-12 18:27:20,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 18:27:20,791 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:20,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 168 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 117 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-07-12 18:27:20,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-12 18:27:20,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2022-07-12 18:27:20,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:20,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-07-12 18:27:20,795 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 22 [2022-07-12 18:27:20,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:20,795 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-07-12 18:27:20,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:20,795 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-07-12 18:27:20,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-12 18:27:20,797 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:20,797 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:20,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 18:27:21,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:21,010 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:21,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:21,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1831987682, now seen corresponding path program 1 times [2022-07-12 18:27:21,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:21,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543251238] [2022-07-12 18:27:21,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:21,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:21,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:21,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:21,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543251238] [2022-07-12 18:27:21,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543251238] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:27:21,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250684740] [2022-07-12 18:27:21,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:21,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:21,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:27:21,171 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) [2022-07-12 18:27:21,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 18:27:21,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:21,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 18:27:21,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:21,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:27:21,369 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-12 18:27:21,370 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 22 treesize of output 21 [2022-07-12 18:27:21,412 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-12 18:27:21,413 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 18 treesize of output 10 [2022-07-12 18:27:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:21,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:27:21,489 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 13 [2022-07-12 18:27:21,491 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 26 treesize of output 22 [2022-07-12 18:27:21,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:21,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250684740] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:27:21,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:27:21,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-07-12 18:27:21,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453116949] [2022-07-12 18:27:21,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:27:21,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 18:27:21,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:21,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 18:27:21,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-07-12 18:27:21,569 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:21,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:21,807 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2022-07-12 18:27:21,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 18:27:21,807 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-12 18:27:21,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:21,807 INFO L225 Difference]: With dead ends: 50 [2022-07-12 18:27:21,808 INFO L226 Difference]: Without dead ends: 39 [2022-07-12 18:27:21,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2022-07-12 18:27:21,808 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 61 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:21,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 105 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 105 Invalid, 0 Unknown, 35 Unchecked, 0.0s Time] [2022-07-12 18:27:21,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-12 18:27:21,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2022-07-12 18:27:21,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:21,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-07-12 18:27:21,810 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 24 [2022-07-12 18:27:21,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:21,811 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-07-12 18:27:21,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:21,811 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-07-12 18:27:21,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-12 18:27:21,811 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:21,811 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:21,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 18:27:22,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:22,028 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:22,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:22,028 INFO L85 PathProgramCache]: Analyzing trace with hash -938115935, now seen corresponding path program 2 times [2022-07-12 18:27:22,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:22,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505062694] [2022-07-12 18:27:22,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:22,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:22,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:22,112 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:22,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:22,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505062694] [2022-07-12 18:27:22,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505062694] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:27:22,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398186312] [2022-07-12 18:27:22,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:27:22,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:22,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:27:22,132 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) [2022-07-12 18:27:22,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 18:27:22,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:27:22,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:27:22,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 18:27:22,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:22,354 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:22,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:27:22,441 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 [2022-07-12 18:27:22,458 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:22,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398186312] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:27:22,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:27:22,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-07-12 18:27:22,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962588517] [2022-07-12 18:27:22,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:27:22,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 18:27:22,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:22,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 18:27:22,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-07-12 18:27:22,459 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:22,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:22,592 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2022-07-12 18:27:22,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:27:22,593 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-12 18:27:22,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:22,593 INFO L225 Difference]: With dead ends: 51 [2022-07-12 18:27:22,593 INFO L226 Difference]: Without dead ends: 51 [2022-07-12 18:27:22,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2022-07-12 18:27:22,594 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 178 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:22,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 110 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:27:22,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-12 18:27:22,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2022-07-12 18:27:22,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:22,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-07-12 18:27:22,596 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 28 [2022-07-12 18:27:22,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:22,596 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-07-12 18:27:22,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:22,597 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-07-12 18:27:22,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-12 18:27:22,597 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:22,597 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:22,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 18:27:22,813 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,SelfDestructingSolverStorable13 [2022-07-12 18:27:22,813 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:22,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:22,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1721723482, now seen corresponding path program 3 times [2022-07-12 18:27:22,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:22,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67608528] [2022-07-12 18:27:22,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:22,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:22,917 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:22,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:22,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67608528] [2022-07-12 18:27:22,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67608528] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:27:22,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793178288] [2022-07-12 18:27:22,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:27:22,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:22,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:27:22,919 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) [2022-07-12 18:27:22,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 18:27:22,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 18:27:22,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:27:22,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-12 18:27:22,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:23,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:27:23,147 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:23,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:27:23,190 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 13 [2022-07-12 18:27:23,191 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 26 treesize of output 22 [2022-07-12 18:27:23,272 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:23,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793178288] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:27:23,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:27:23,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-07-12 18:27:23,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262910713] [2022-07-12 18:27:23,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:27:23,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 18:27:23,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:23,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 18:27:23,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-07-12 18:27:23,273 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:23,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:23,516 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2022-07-12 18:27:23,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 18:27:23,516 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-12 18:27:23,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:23,516 INFO L225 Difference]: With dead ends: 92 [2022-07-12 18:27:23,517 INFO L226 Difference]: Without dead ends: 79 [2022-07-12 18:27:23,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 18:27:23,517 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 205 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:23,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 184 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 225 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-07-12 18:27:23,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-12 18:27:23,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 48. [2022-07-12 18:27:23,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:23,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-07-12 18:27:23,519 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 31 [2022-07-12 18:27:23,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:23,519 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-07-12 18:27:23,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:23,519 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-07-12 18:27:23,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-12 18:27:23,520 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:23,520 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:23,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 18:27:23,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-12 18:27:23,727 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:23,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:23,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1481717885, now seen corresponding path program 3 times [2022-07-12 18:27:23,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:23,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300428834] [2022-07-12 18:27:23,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:23,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:23,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:23,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:23,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300428834] [2022-07-12 18:27:23,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300428834] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:27:23,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660160012] [2022-07-12 18:27:23,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:27:23,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:23,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:27:23,837 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) [2022-07-12 18:27:23,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 18:27:23,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 18:27:23,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:27:23,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-12 18:27:23,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:23,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:27:23,983 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 18 [2022-07-12 18:27:24,092 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:24,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:27:24,173 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 31 treesize of output 27 [2022-07-12 18:27:24,176 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-12 18:27:24,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2022-07-12 18:27:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:24,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660160012] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:27:24,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:27:24,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 27 [2022-07-12 18:27:24,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188480335] [2022-07-12 18:27:24,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:27:24,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-12 18:27:24,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:24,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-12 18:27:24,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-07-12 18:27:24,296 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:24,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:24,609 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2022-07-12 18:27:24,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 18:27:24,610 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-12 18:27:24,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:24,610 INFO L225 Difference]: With dead ends: 66 [2022-07-12 18:27:24,610 INFO L226 Difference]: Without dead ends: 45 [2022-07-12 18:27:24,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=258, Invalid=1224, Unknown=0, NotChecked=0, Total=1482 [2022-07-12 18:27:24,611 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 90 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:24,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 190 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:27:24,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-12 18:27:24,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-07-12 18:27:24,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:24,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-07-12 18:27:24,613 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2022-07-12 18:27:24,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:24,613 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-07-12 18:27:24,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:24,613 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-07-12 18:27:24,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-12 18:27:24,613 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:24,613 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:24,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 18:27:24,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:24,814 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:24,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:24,814 INFO L85 PathProgramCache]: Analyzing trace with hash 374629827, now seen corresponding path program 4 times [2022-07-12 18:27:24,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:24,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645257534] [2022-07-12 18:27:24,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:24,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:24,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:24,933 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:24,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:24,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645257534] [2022-07-12 18:27:24,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645257534] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:27:24,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832907411] [2022-07-12 18:27:24,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:27:24,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:24,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:27:24,935 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:27:24,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 18:27:25,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:27:25,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:27:25,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 18:27:25,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:25,120 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:25,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:27:25,240 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 [2022-07-12 18:27:25,261 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:25,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832907411] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:27:25,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:27:25,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 22 [2022-07-12 18:27:25,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853316515] [2022-07-12 18:27:25,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:27:25,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 18:27:25,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:25,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 18:27:25,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-07-12 18:27:25,263 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 23 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:25,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:25,459 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-07-12 18:27:25,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:27:25,460 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-12 18:27:25,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:25,460 INFO L225 Difference]: With dead ends: 55 [2022-07-12 18:27:25,460 INFO L226 Difference]: Without dead ends: 55 [2022-07-12 18:27:25,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2022-07-12 18:27:25,461 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 298 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:25,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 151 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:27:25,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-12 18:27:25,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2022-07-12 18:27:25,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.125) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:25,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-07-12 18:27:25,462 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 35 [2022-07-12 18:27:25,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:25,463 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-07-12 18:27:25,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:25,463 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-07-12 18:27:25,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-12 18:27:25,463 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:25,463 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:25,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-12 18:27:25,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-12 18:27:25,664 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:25,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:25,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1667122081, now seen corresponding path program 5 times [2022-07-12 18:27:25,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:25,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116523196] [2022-07-12 18:27:25,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:25,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:25,816 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:25,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:25,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116523196] [2022-07-12 18:27:25,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116523196] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:27:25,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084390164] [2022-07-12 18:27:25,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:27:25,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:25,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:27:25,818 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:27:25,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 18:27:25,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-12 18:27:25,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:27:25,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-12 18:27:25,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:25,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:27:26,062 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 [2022-07-12 18:27:26,064 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:26,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:27:26,112 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 13 [2022-07-12 18:27:26,113 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 26 treesize of output 22 [2022-07-12 18:27:26,210 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:26,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084390164] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:27:26,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:27:26,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2022-07-12 18:27:26,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902407602] [2022-07-12 18:27:26,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:27:26,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-12 18:27:26,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:26,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-12 18:27:26,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-07-12 18:27:26,212 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:26,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:26,614 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2022-07-12 18:27:26,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 18:27:26,614 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-12 18:27:26,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:26,614 INFO L225 Difference]: With dead ends: 90 [2022-07-12 18:27:26,615 INFO L226 Difference]: Without dead ends: 56 [2022-07-12 18:27:26,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=238, Invalid=1322, Unknown=0, NotChecked=0, Total=1560 [2022-07-12 18:27:26,616 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 116 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:26,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 285 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:27:26,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-12 18:27:26,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2022-07-12 18:27:26,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:26,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2022-07-12 18:27:26,622 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 40 [2022-07-12 18:27:26,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:26,622 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2022-07-12 18:27:26,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:26,622 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2022-07-12 18:27:26,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 18:27:26,625 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:26,625 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:26,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 18:27:26,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-12 18:27:26,838 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:26,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:26,838 INFO L85 PathProgramCache]: Analyzing trace with hash 537281572, now seen corresponding path program 6 times [2022-07-12 18:27:26,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:26,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795117405] [2022-07-12 18:27:26,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:26,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:26,970 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:26,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:26,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795117405] [2022-07-12 18:27:26,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795117405] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:27:26,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739527588] [2022-07-12 18:27:26,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:27:26,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:26,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:27:26,972 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:27:27,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 18:27:27,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-12 18:27:27,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:27:27,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 18:27:27,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:27,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:27:27,440 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 7 treesize of output 5 [2022-07-12 18:27:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:27,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739527588] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:27:27,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:27:27,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 30 [2022-07-12 18:27:27,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844292967] [2022-07-12 18:27:27,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:27:27,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-12 18:27:27,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:27,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-12 18:27:27,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2022-07-12 18:27:27,467 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 31 states, 30 states have (on average 3.6) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:27,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:27,763 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2022-07-12 18:27:27,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:27:27,763 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.6) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-12 18:27:27,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:27,764 INFO L225 Difference]: With dead ends: 66 [2022-07-12 18:27:27,764 INFO L226 Difference]: Without dead ends: 66 [2022-07-12 18:27:27,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=1312, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 18:27:27,765 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 426 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:27,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 192 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:27:27,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-12 18:27:27,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2022-07-12 18:27:27,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.11864406779661) internal successors, (66), 59 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:27,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2022-07-12 18:27:27,773 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 44 [2022-07-12 18:27:27,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:27,773 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2022-07-12 18:27:27,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.6) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:27,774 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2022-07-12 18:27:27,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-12 18:27:27,776 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:27,777 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:27,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 18:27:27,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:27,993 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:27,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:27,993 INFO L85 PathProgramCache]: Analyzing trace with hash 967653856, now seen corresponding path program 7 times [2022-07-12 18:27:27,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:27,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824831509] [2022-07-12 18:27:27,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:27,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:28,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:28,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824831509] [2022-07-12 18:27:28,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824831509] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:27:28,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267305434] [2022-07-12 18:27:28,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:27:28,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:28,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:27:28,181 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:27:28,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 18:27:28,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:28,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-12 18:27:28,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:28,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:27:28,466 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 [2022-07-12 18:27:28,468 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:28,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:27:28,525 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 13 [2022-07-12 18:27:28,526 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 26 treesize of output 22 [2022-07-12 18:27:28,628 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:28,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267305434] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:27:28,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:27:28,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 29 [2022-07-12 18:27:28,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113924740] [2022-07-12 18:27:28,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:27:28,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-12 18:27:28,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:28,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-12 18:27:28,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2022-07-12 18:27:28,629 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:29,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:29,029 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2022-07-12 18:27:29,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 18:27:29,029 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-07-12 18:27:29,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:29,030 INFO L225 Difference]: With dead ends: 100 [2022-07-12 18:27:29,030 INFO L226 Difference]: Without dead ends: 67 [2022-07-12 18:27:29,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2022-07-12 18:27:29,031 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 97 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:29,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 436 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 606 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-07-12 18:27:29,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-12 18:27:29,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-07-12 18:27:29,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 63 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:29,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2022-07-12 18:27:29,033 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 49 [2022-07-12 18:27:29,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:29,033 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2022-07-12 18:27:29,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:29,033 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2022-07-12 18:27:29,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-12 18:27:29,034 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:29,034 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:29,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-12 18:27:29,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:29,247 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:29,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:29,248 INFO L85 PathProgramCache]: Analyzing trace with hash 999955645, now seen corresponding path program 8 times [2022-07-12 18:27:29,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:29,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945981227] [2022-07-12 18:27:29,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:29,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:29,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:29,402 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:29,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:29,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945981227] [2022-07-12 18:27:29,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945981227] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:27:29,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072464598] [2022-07-12 18:27:29,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:27:29,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:29,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:27:29,404 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:27:29,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 18:27:29,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:27:29,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:27:29,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-12 18:27:29,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:29,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:27:29,852 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 [2022-07-12 18:27:29,878 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:29,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072464598] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:27:29,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:27:29,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 31 [2022-07-12 18:27:29,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533079488] [2022-07-12 18:27:29,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:27:29,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-12 18:27:29,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:29,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-12 18:27:29,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-07-12 18:27:29,881 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 32 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 32 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:30,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:30,192 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2022-07-12 18:27:30,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 18:27:30,192 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 32 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-12 18:27:30,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:30,192 INFO L225 Difference]: With dead ends: 77 [2022-07-12 18:27:30,193 INFO L226 Difference]: Without dead ends: 77 [2022-07-12 18:27:30,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=306, Invalid=1254, Unknown=0, NotChecked=0, Total=1560 [2022-07-12 18:27:30,194 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 379 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:30,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 322 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:27:30,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-12 18:27:30,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2022-07-12 18:27:30,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 70 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:30,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2022-07-12 18:27:30,197 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 53 [2022-07-12 18:27:30,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:30,197 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2022-07-12 18:27:30,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 32 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:30,197 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2022-07-12 18:27:30,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-12 18:27:30,198 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:30,199 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:30,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 18:27:30,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-12 18:27:30,415 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:30,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:30,416 INFO L85 PathProgramCache]: Analyzing trace with hash -36316953, now seen corresponding path program 9 times [2022-07-12 18:27:30,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:30,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824622228] [2022-07-12 18:27:30,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:30,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:30,628 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 21 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:30,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:30,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824622228] [2022-07-12 18:27:30,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824622228] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:27:30,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892940144] [2022-07-12 18:27:30,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:27:30,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:30,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:27:30,630 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:27:30,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 18:27:30,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-12 18:27:30,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:27:30,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-12 18:27:30,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:30,730 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 [2022-07-12 18:27:30,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:27:31,096 INFO L356 Elim1Store]: treesize reduction 3, result has 72.7 percent of original size [2022-07-12 18:27:31,096 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 19 treesize of output 16 [2022-07-12 18:27:31,150 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-12 18:27:31,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:27:31,532 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 13 treesize of output 11 [2022-07-12 18:27:31,535 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 20 treesize of output 18 [2022-07-12 18:27:31,615 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-12 18:27:31,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892940144] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:27:31,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:27:31,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8, 8] total 32 [2022-07-12 18:27:31,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894625997] [2022-07-12 18:27:31,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:27:31,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-12 18:27:31,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:31,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-12 18:27:31,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=911, Unknown=0, NotChecked=0, Total=992 [2022-07-12 18:27:31,617 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 32 states, 32 states have (on average 3.0) internal successors, (96), 32 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:32,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:32,349 INFO L93 Difference]: Finished difference Result 144 states and 161 transitions. [2022-07-12 18:27:32,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-12 18:27:32,349 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.0) internal successors, (96), 32 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-07-12 18:27:32,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:32,350 INFO L225 Difference]: With dead ends: 144 [2022-07-12 18:27:32,350 INFO L226 Difference]: Without dead ends: 141 [2022-07-12 18:27:32,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=346, Invalid=3944, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 18:27:32,352 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 36 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:32,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 422 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 345 Invalid, 0 Unknown, 102 Unchecked, 0.1s Time] [2022-07-12 18:27:32,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-12 18:27:32,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 126. [2022-07-12 18:27:32,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.144) internal successors, (143), 125 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:32,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 143 transitions. [2022-07-12 18:27:32,358 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 143 transitions. Word has length 58 [2022-07-12 18:27:32,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:32,358 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 143 transitions. [2022-07-12 18:27:32,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.0) internal successors, (96), 32 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:32,358 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 143 transitions. [2022-07-12 18:27:32,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-12 18:27:32,359 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:32,359 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:32,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 18:27:32,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-12 18:27:32,576 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:32,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:32,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1191879466, now seen corresponding path program 4 times [2022-07-12 18:27:32,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:32,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360850479] [2022-07-12 18:27:32,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:32,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:32,767 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 21 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:32,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:32,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360850479] [2022-07-12 18:27:32,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360850479] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:27:32,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24091911] [2022-07-12 18:27:32,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:27:32,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:32,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:27:32,773 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:27:32,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 18:27:32,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:27:32,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:27:32,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-12 18:27:32,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:33,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:27:33,078 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-12 18:27:33,078 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 22 treesize of output 21 [2022-07-12 18:27:33,125 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 [2022-07-12 18:27:33,127 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 21 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:33,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:27:33,205 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 13 [2022-07-12 18:27:33,206 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 26 treesize of output 22 [2022-07-12 18:27:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 21 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:33,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24091911] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:27:33,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:27:33,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 32 [2022-07-12 18:27:33,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061179292] [2022-07-12 18:27:33,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:27:33,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-12 18:27:33,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:33,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-12 18:27:33,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2022-07-12 18:27:33,336 INFO L87 Difference]: Start difference. First operand 126 states and 143 transitions. Second operand has 32 states, 32 states have (on average 3.28125) internal successors, (105), 32 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:33,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:33,908 INFO L93 Difference]: Finished difference Result 162 states and 182 transitions. [2022-07-12 18:27:33,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 18:27:33,909 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.28125) internal successors, (105), 32 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-12 18:27:33,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:33,909 INFO L225 Difference]: With dead ends: 162 [2022-07-12 18:27:33,909 INFO L226 Difference]: Without dead ends: 103 [2022-07-12 18:27:33,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=232, Invalid=1930, Unknown=0, NotChecked=0, Total=2162 [2022-07-12 18:27:33,910 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 173 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:33,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 576 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 775 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2022-07-12 18:27:33,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-12 18:27:33,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2022-07-12 18:27:33,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.1313131313131313) internal successors, (112), 99 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:33,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 112 transitions. [2022-07-12 18:27:33,912 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 112 transitions. Word has length 60 [2022-07-12 18:27:33,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:33,916 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 112 transitions. [2022-07-12 18:27:33,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.28125) internal successors, (105), 32 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:33,917 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 112 transitions. [2022-07-12 18:27:33,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-12 18:27:33,917 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:33,917 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:33,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 18:27:34,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:34,127 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:34,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:34,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1846000595, now seen corresponding path program 5 times [2022-07-12 18:27:34,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:34,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428650013] [2022-07-12 18:27:34,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:34,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:34,317 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 28 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:34,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:34,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428650013] [2022-07-12 18:27:34,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428650013] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:27:34,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705470113] [2022-07-12 18:27:34,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:27:34,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:34,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:27:34,319 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:27:34,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 18:27:34,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-12 18:27:34,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:27:34,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-12 18:27:34,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:34,405 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 [2022-07-12 18:27:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:34,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:27:35,559 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:35,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705470113] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:27:35,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:27:35,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 19] total 49 [2022-07-12 18:27:35,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747244907] [2022-07-12 18:27:35,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:27:35,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-12 18:27:35,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:35,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-12 18:27:35,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=2110, Unknown=0, NotChecked=0, Total=2450 [2022-07-12 18:27:35,561 INFO L87 Difference]: Start difference. First operand 100 states and 112 transitions. Second operand has 50 states, 49 states have (on average 3.795918367346939) internal successors, (186), 50 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:36,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:36,866 INFO L93 Difference]: Finished difference Result 311 states and 357 transitions. [2022-07-12 18:27:36,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-12 18:27:36,866 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 3.795918367346939) internal successors, (186), 50 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-12 18:27:36,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:36,867 INFO L225 Difference]: With dead ends: 311 [2022-07-12 18:27:36,867 INFO L226 Difference]: Without dead ends: 311 [2022-07-12 18:27:36,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1179, Invalid=4983, Unknown=0, NotChecked=0, Total=6162 [2022-07-12 18:27:36,869 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1101 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1101 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:36,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1101 Valid, 767 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 18:27:36,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-07-12 18:27:36,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 202. [2022-07-12 18:27:36,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.154228855721393) internal successors, (232), 201 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:36,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 232 transitions. [2022-07-12 18:27:36,872 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 232 transitions. Word has length 64 [2022-07-12 18:27:36,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:36,872 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 232 transitions. [2022-07-12 18:27:36,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 3.795918367346939) internal successors, (186), 50 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:36,873 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 232 transitions. [2022-07-12 18:27:36,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-12 18:27:36,873 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:36,873 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:36,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 18:27:37,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:37,074 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:37,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:37,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1045878647, now seen corresponding path program 6 times [2022-07-12 18:27:37,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:37,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694369584] [2022-07-12 18:27:37,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:37,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:37,355 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 25 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:37,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:37,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694369584] [2022-07-12 18:27:37,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694369584] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:27:37,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886841103] [2022-07-12 18:27:37,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:27:37,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:37,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:27:37,357 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:27:37,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 18:27:37,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-12 18:27:37,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:27:37,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-12 18:27:37,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:37,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:27:37,714 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-12 18:27:37,714 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 22 treesize of output 21 [2022-07-12 18:27:37,767 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 [2022-07-12 18:27:37,769 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 25 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:37,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:27:37,846 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 13 [2022-07-12 18:27:37,848 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 26 treesize of output 22 [2022-07-12 18:27:38,018 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 25 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:38,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886841103] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:27:38,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:27:38,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 37 [2022-07-12 18:27:38,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437413560] [2022-07-12 18:27:38,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:27:38,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-12 18:27:38,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:38,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-12 18:27:38,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 18:27:38,019 INFO L87 Difference]: Start difference. First operand 202 states and 232 transitions. Second operand has 37 states, 37 states have (on average 3.189189189189189) internal successors, (118), 37 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:38,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:38,723 INFO L93 Difference]: Finished difference Result 193 states and 217 transitions. [2022-07-12 18:27:38,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 18:27:38,724 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.189189189189189) internal successors, (118), 37 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-07-12 18:27:38,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:38,724 INFO L225 Difference]: With dead ends: 193 [2022-07-12 18:27:38,724 INFO L226 Difference]: Without dead ends: 119 [2022-07-12 18:27:38,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 117 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=264, Invalid=2598, Unknown=0, NotChecked=0, Total=2862 [2022-07-12 18:27:38,725 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 220 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:38,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 787 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1100 Invalid, 0 Unknown, 36 Unchecked, 0.4s Time] [2022-07-12 18:27:38,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-12 18:27:38,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2022-07-12 18:27:38,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.1304347826086956) internal successors, (130), 115 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:38,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 130 transitions. [2022-07-12 18:27:38,727 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 130 transitions. Word has length 69 [2022-07-12 18:27:38,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:38,727 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 130 transitions. [2022-07-12 18:27:38,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.189189189189189) internal successors, (118), 37 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:38,728 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 130 transitions. [2022-07-12 18:27:38,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-12 18:27:38,728 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:38,728 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:38,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 18:27:38,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-12 18:27:38,929 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:38,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:38,929 INFO L85 PathProgramCache]: Analyzing trace with hash -83187244, now seen corresponding path program 7 times [2022-07-12 18:27:38,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:38,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685814473] [2022-07-12 18:27:38,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:38,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:38,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:39,157 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 45 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:39,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:39,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685814473] [2022-07-12 18:27:39,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685814473] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:27:39,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256283201] [2022-07-12 18:27:39,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:27:39,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:39,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:27:39,159 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:27:39,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 18:27:39,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:39,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-12 18:27:39,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 66 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:39,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:27:39,762 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 [2022-07-12 18:27:39,789 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 66 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:39,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256283201] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:27:39,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:27:39,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 39 [2022-07-12 18:27:39,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824816797] [2022-07-12 18:27:39,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:27:39,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-12 18:27:39,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:39,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-12 18:27:39,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1360, Unknown=0, NotChecked=0, Total=1560 [2022-07-12 18:27:39,793 INFO L87 Difference]: Start difference. First operand 116 states and 130 transitions. Second operand has 40 states, 39 states have (on average 3.8974358974358974) internal successors, (152), 40 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:40,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:40,118 INFO L93 Difference]: Finished difference Result 140 states and 158 transitions. [2022-07-12 18:27:40,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 18:27:40,118 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.8974358974358974) internal successors, (152), 40 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-07-12 18:27:40,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:40,118 INFO L225 Difference]: With dead ends: 140 [2022-07-12 18:27:40,119 INFO L226 Difference]: Without dead ends: 140 [2022-07-12 18:27:40,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=1985, Unknown=0, NotChecked=0, Total=2450 [2022-07-12 18:27:40,122 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 490 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:40,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 578 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:27:40,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-12 18:27:40,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 128. [2022-07-12 18:27:40,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 127 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:40,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 144 transitions. [2022-07-12 18:27:40,130 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 144 transitions. Word has length 73 [2022-07-12 18:27:40,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:40,130 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 144 transitions. [2022-07-12 18:27:40,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.8974358974358974) internal successors, (152), 40 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:40,131 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 144 transitions. [2022-07-12 18:27:40,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-12 18:27:40,133 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:40,147 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:40,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 18:27:40,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-12 18:27:40,363 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:40,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:40,363 INFO L85 PathProgramCache]: Analyzing trace with hash 653582896, now seen corresponding path program 8 times [2022-07-12 18:27:40,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:40,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298728318] [2022-07-12 18:27:40,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:40,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 29 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:40,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:40,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298728318] [2022-07-12 18:27:40,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298728318] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:27:40,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080545280] [2022-07-12 18:27:40,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:27:40,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:40,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:27:40,694 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:27:40,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 18:27:40,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:27:40,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:27:40,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-12 18:27:40,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:40,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:27:41,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:27:41,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:27:41,224 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 22 treesize of output 21 [2022-07-12 18:27:41,787 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:27:41,787 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 18 treesize of output 18 [2022-07-12 18:27:41,931 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 66 proven. 173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:41,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:27:42,650 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 13 [2022-07-12 18:27:42,652 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 26 treesize of output 22 [2022-07-12 18:27:43,407 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 91 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:43,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080545280] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:27:43,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:27:43,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 66 [2022-07-12 18:27:43,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983104375] [2022-07-12 18:27:43,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:27:43,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 18:27:43,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:43,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 18:27:43,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=3981, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 18:27:43,409 INFO L87 Difference]: Start difference. First operand 128 states and 144 transitions. Second operand has 66 states, 66 states have (on average 3.4545454545454546) internal successors, (228), 66 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:44,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:44,526 INFO L93 Difference]: Finished difference Result 260 states and 295 transitions. [2022-07-12 18:27:44,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-12 18:27:44,526 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.4545454545454546) internal successors, (228), 66 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-07-12 18:27:44,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:44,527 INFO L225 Difference]: With dead ends: 260 [2022-07-12 18:27:44,527 INFO L226 Difference]: Without dead ends: 254 [2022-07-12 18:27:44,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=654, Invalid=7356, Unknown=0, NotChecked=0, Total=8010 [2022-07-12 18:27:44,528 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 250 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:44,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 1089 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 715 Invalid, 0 Unknown, 125 Unchecked, 0.2s Time] [2022-07-12 18:27:44,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-07-12 18:27:44,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 200. [2022-07-12 18:27:44,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.150753768844221) internal successors, (229), 199 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:44,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 229 transitions. [2022-07-12 18:27:44,531 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 229 transitions. Word has length 78 [2022-07-12 18:27:44,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:44,531 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 229 transitions. [2022-07-12 18:27:44,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.4545454545454546) internal successors, (228), 66 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:44,532 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 229 transitions. [2022-07-12 18:27:44,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-12 18:27:44,532 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:44,532 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:44,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-12 18:27:44,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-12 18:27:44,748 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:44,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:44,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1524452150, now seen corresponding path program 9 times [2022-07-12 18:27:44,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:44,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035297803] [2022-07-12 18:27:44,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:44,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:44,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:45,015 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 29 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:45,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:45,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035297803] [2022-07-12 18:27:45,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035297803] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:27:45,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844599004] [2022-07-12 18:27:45,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:27:45,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:45,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:27:45,017 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:27:45,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 18:27:45,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-12 18:27:45,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:27:45,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-12 18:27:45,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:45,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:27:45,410 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-07-12 18:27:45,410 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 21 treesize of output 20 [2022-07-12 18:27:45,441 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 [2022-07-12 18:27:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 29 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:45,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:27:45,527 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 13 [2022-07-12 18:27:45,528 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 26 treesize of output 22 [2022-07-12 18:27:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 29 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:45,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844599004] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:27:45,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:27:45,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 38 [2022-07-12 18:27:45,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659167992] [2022-07-12 18:27:45,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:27:45,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-12 18:27:45,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:45,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-12 18:27:45,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2022-07-12 18:27:45,682 INFO L87 Difference]: Start difference. First operand 200 states and 229 transitions. Second operand has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:46,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:46,271 INFO L93 Difference]: Finished difference Result 320 states and 364 transitions. [2022-07-12 18:27:46,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 18:27:46,272 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-07-12 18:27:46,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:46,272 INFO L225 Difference]: With dead ends: 320 [2022-07-12 18:27:46,273 INFO L226 Difference]: Without dead ends: 250 [2022-07-12 18:27:46,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 136 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=263, Invalid=2817, Unknown=0, NotChecked=0, Total=3080 [2022-07-12 18:27:46,274 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 115 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:46,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 894 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1172 Invalid, 0 Unknown, 91 Unchecked, 0.3s Time] [2022-07-12 18:27:46,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-07-12 18:27:46,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 200. [2022-07-12 18:27:46,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.1457286432160805) internal successors, (228), 199 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:46,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 228 transitions. [2022-07-12 18:27:46,277 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 228 transitions. Word has length 78 [2022-07-12 18:27:46,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:46,278 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 228 transitions. [2022-07-12 18:27:46,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:46,278 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 228 transitions. [2022-07-12 18:27:46,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-12 18:27:46,278 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:46,278 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:46,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-12 18:27:46,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:46,492 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:46,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:46,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1677653747, now seen corresponding path program 10 times [2022-07-12 18:27:46,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:46,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947062997] [2022-07-12 18:27:46,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:46,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:46,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:46,749 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 29 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:46,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:46,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947062997] [2022-07-12 18:27:46,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947062997] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:27:46,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569729982] [2022-07-12 18:27:46,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:27:46,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:46,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:27:46,751 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:27:46,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-12 18:27:46,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:27:46,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:27:46,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-12 18:27:46,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:47,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:27:47,167 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-12 18:27:47,167 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 22 treesize of output 21 [2022-07-12 18:27:47,202 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-07-12 18:27:47,202 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 21 treesize of output 20 [2022-07-12 18:27:47,232 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 [2022-07-12 18:27:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 29 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:47,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:27:47,318 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 13 [2022-07-12 18:27:47,319 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 26 treesize of output 22 [2022-07-12 18:27:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 29 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:47,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569729982] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:27:47,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:27:47,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 38 [2022-07-12 18:27:47,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218512921] [2022-07-12 18:27:47,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:27:47,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-12 18:27:47,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:47,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-12 18:27:47,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2022-07-12 18:27:47,481 INFO L87 Difference]: Start difference. First operand 200 states and 228 transitions. Second operand has 38 states, 38 states have (on average 3.5) internal successors, (133), 38 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:48,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:48,281 INFO L93 Difference]: Finished difference Result 248 states and 280 transitions. [2022-07-12 18:27:48,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-12 18:27:48,281 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.5) internal successors, (133), 38 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-07-12 18:27:48,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:48,282 INFO L225 Difference]: With dead ends: 248 [2022-07-12 18:27:48,282 INFO L226 Difference]: Without dead ends: 165 [2022-07-12 18:27:48,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 140 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=353, Invalid=3429, Unknown=0, NotChecked=0, Total=3782 [2022-07-12 18:27:48,283 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 459 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 1352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:48,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 831 Invalid, 1352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:27:48,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-12 18:27:48,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2022-07-12 18:27:48,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.1428571428571428) internal successors, (184), 161 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:48,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 184 transitions. [2022-07-12 18:27:48,285 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 184 transitions. Word has length 80 [2022-07-12 18:27:48,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:48,286 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 184 transitions. [2022-07-12 18:27:48,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.5) internal successors, (133), 38 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:48,286 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 184 transitions. [2022-07-12 18:27:48,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-12 18:27:48,286 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:48,286 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:48,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-12 18:27:48,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-12 18:27:48,503 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:48,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:48,504 INFO L85 PathProgramCache]: Analyzing trace with hash 2135505677, now seen corresponding path program 11 times [2022-07-12 18:27:48,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:48,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073370517] [2022-07-12 18:27:48,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:48,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:48,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 66 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:48,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:48,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073370517] [2022-07-12 18:27:48,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073370517] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:27:48,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524886260] [2022-07-12 18:27:48,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:27:48,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:48,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:27:48,817 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:27:48,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-12 18:27:48,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-12 18:27:48,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:27:48,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-12 18:27:48,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:48,955 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 [2022-07-12 18:27:49,446 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 91 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:49,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:27:49,902 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 120 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:49,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524886260] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:27:49,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:27:49,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 57 [2022-07-12 18:27:49,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613119905] [2022-07-12 18:27:49,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:27:49,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-12 18:27:49,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:49,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-12 18:27:49,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=2877, Unknown=0, NotChecked=0, Total=3306 [2022-07-12 18:27:49,904 INFO L87 Difference]: Start difference. First operand 162 states and 184 transitions. Second operand has 58 states, 57 states have (on average 4.192982456140351) internal successors, (239), 58 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:50,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:50,319 INFO L93 Difference]: Finished difference Result 188 states and 214 transitions. [2022-07-12 18:27:50,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 18:27:50,320 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 4.192982456140351) internal successors, (239), 58 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-07-12 18:27:50,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:50,322 INFO L225 Difference]: With dead ends: 188 [2022-07-12 18:27:50,322 INFO L226 Difference]: Without dead ends: 188 [2022-07-12 18:27:50,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1361 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=832, Invalid=3860, Unknown=0, NotChecked=0, Total=4692 [2022-07-12 18:27:50,323 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 686 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:50,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 749 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:27:50,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-07-12 18:27:50,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 144. [2022-07-12 18:27:50,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.132867132867133) internal successors, (162), 143 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:50,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 162 transitions. [2022-07-12 18:27:50,328 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 162 transitions. Word has length 82 [2022-07-12 18:27:50,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:50,329 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 162 transitions. [2022-07-12 18:27:50,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 4.192982456140351) internal successors, (239), 58 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:50,329 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 162 transitions. [2022-07-12 18:27:50,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-12 18:27:50,330 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:50,331 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:50,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-12 18:27:50,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:50,548 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:50,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:50,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1292013839, now seen corresponding path program 12 times [2022-07-12 18:27:50,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:50,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929895500] [2022-07-12 18:27:50,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:50,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 33 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:50,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:50,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929895500] [2022-07-12 18:27:50,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929895500] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:27:50,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542848755] [2022-07-12 18:27:50,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:27:50,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:50,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:27:50,890 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:27:50,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-12 18:27:51,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-12 18:27:51,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:27:51,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 74 conjunts are in the unsatisfiable core [2022-07-12 18:27:51,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:51,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:27:51,339 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-12 18:27:51,340 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 22 treesize of output 21 [2022-07-12 18:27:51,393 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 [2022-07-12 18:27:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 33 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:51,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:27:51,475 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 13 [2022-07-12 18:27:51,477 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 26 treesize of output 22 [2022-07-12 18:27:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 33 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:51,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542848755] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:27:51,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:27:51,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 41 [2022-07-12 18:27:51,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155779035] [2022-07-12 18:27:51,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:27:51,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-12 18:27:51,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:51,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-12 18:27:51,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1528, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 18:27:51,669 INFO L87 Difference]: Start difference. First operand 144 states and 162 transitions. Second operand has 41 states, 41 states have (on average 3.5121951219512195) internal successors, (144), 41 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:52,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:52,533 INFO L93 Difference]: Finished difference Result 249 states and 281 transitions. [2022-07-12 18:27:52,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-12 18:27:52,533 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.5121951219512195) internal successors, (144), 41 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2022-07-12 18:27:52,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:52,534 INFO L225 Difference]: With dead ends: 249 [2022-07-12 18:27:52,534 INFO L226 Difference]: Without dead ends: 151 [2022-07-12 18:27:52,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 149 SyntacticMatches, 9 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=298, Invalid=3484, Unknown=0, NotChecked=0, Total=3782 [2022-07-12 18:27:52,535 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 213 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1104 SdHoareTripleChecker+Invalid, 1609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:52,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1104 Invalid, 1609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1459 Invalid, 0 Unknown, 81 Unchecked, 0.4s Time] [2022-07-12 18:27:52,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-12 18:27:52,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2022-07-12 18:27:52,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.129251700680272) internal successors, (166), 147 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:52,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 166 transitions. [2022-07-12 18:27:52,537 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 166 transitions. Word has length 87 [2022-07-12 18:27:52,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:52,537 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 166 transitions. [2022-07-12 18:27:52,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.5121951219512195) internal successors, (144), 41 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:52,537 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 166 transitions. [2022-07-12 18:27:52,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-12 18:27:52,537 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:52,537 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:52,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-12 18:27:52,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:52,743 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:52,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:52,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1141261326, now seen corresponding path program 13 times [2022-07-12 18:27:52,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:52,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977107181] [2022-07-12 18:27:52,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:52,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:52,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:53,031 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 91 proven. 251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:53,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:53,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977107181] [2022-07-12 18:27:53,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977107181] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:27:53,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837684009] [2022-07-12 18:27:53,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:27:53,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:53,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:27:53,033 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:27:53,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-12 18:27:53,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:53,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-12 18:27:53,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:53,428 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 120 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:53,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:27:53,766 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 [2022-07-12 18:27:53,808 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 120 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:53,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837684009] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:27:53,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:27:53,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 47 [2022-07-12 18:27:53,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605298355] [2022-07-12 18:27:53,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:27:53,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-12 18:27:53,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:53,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-12 18:27:53,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1974, Unknown=0, NotChecked=0, Total=2256 [2022-07-12 18:27:53,810 INFO L87 Difference]: Start difference. First operand 148 states and 166 transitions. Second operand has 48 states, 47 states have (on average 4.0) internal successors, (188), 48 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:54,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:54,378 INFO L93 Difference]: Finished difference Result 172 states and 194 transitions. [2022-07-12 18:27:54,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 18:27:54,378 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.0) internal successors, (188), 48 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-07-12 18:27:54,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:54,379 INFO L225 Difference]: With dead ends: 172 [2022-07-12 18:27:54,379 INFO L226 Difference]: Without dead ends: 172 [2022-07-12 18:27:54,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=660, Invalid=2880, Unknown=0, NotChecked=0, Total=3540 [2022-07-12 18:27:54,380 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 491 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:54,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 816 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1263 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:27:54,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-07-12 18:27:54,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 160. [2022-07-12 18:27:54,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.1320754716981132) internal successors, (180), 159 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:54,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 180 transitions. [2022-07-12 18:27:54,383 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 180 transitions. Word has length 91 [2022-07-12 18:27:54,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:54,384 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 180 transitions. [2022-07-12 18:27:54,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.0) internal successors, (188), 48 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:54,384 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 180 transitions. [2022-07-12 18:27:54,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-12 18:27:54,385 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:54,385 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:54,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-12 18:27:54,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:54,595 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:54,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:54,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1881316406, now seen corresponding path program 14 times [2022-07-12 18:27:54,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:54,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245357973] [2022-07-12 18:27:54,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:54,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:54,957 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 37 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:54,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:54,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245357973] [2022-07-12 18:27:54,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245357973] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:27:54,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970598012] [2022-07-12 18:27:54,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:27:54,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:54,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:27:54,959 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:27:54,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-12 18:27:55,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:27:55,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:27:55,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-12 18:27:55,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:55,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:27:55,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:27:55,410 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 22 treesize of output 21 [2022-07-12 18:27:55,967 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:27:55,967 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 18 treesize of output 18 [2022-07-12 18:27:56,065 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 120 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:56,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:27:56,673 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 13 [2022-07-12 18:27:56,675 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 26 treesize of output 22 [2022-07-12 18:27:56,677 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 35 treesize of output 27 [2022-07-12 18:27:56,711 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 120 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:56,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970598012] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:27:56,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:27:56,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 66 [2022-07-12 18:27:56,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170960667] [2022-07-12 18:27:56,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:27:56,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 18:27:56,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:56,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 18:27:56,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=3965, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 18:27:56,713 INFO L87 Difference]: Start difference. First operand 160 states and 180 transitions. Second operand has 66 states, 66 states have (on average 3.696969696969697) internal successors, (244), 66 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:57,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:57,592 INFO L93 Difference]: Finished difference Result 326 states and 371 transitions. [2022-07-12 18:27:57,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-12 18:27:57,592 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.696969696969697) internal successors, (244), 66 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2022-07-12 18:27:57,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:57,593 INFO L225 Difference]: With dead ends: 326 [2022-07-12 18:27:57,593 INFO L226 Difference]: Without dead ends: 320 [2022-07-12 18:27:57,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 176 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=551, Invalid=6255, Unknown=0, NotChecked=0, Total=6806 [2022-07-12 18:27:57,594 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 273 mSDsluCounter, 1533 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:57,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 1577 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1055 Invalid, 0 Unknown, 150 Unchecked, 0.2s Time] [2022-07-12 18:27:57,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-07-12 18:27:57,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 252. [2022-07-12 18:27:57,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.151394422310757) internal successors, (289), 251 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:57,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 289 transitions. [2022-07-12 18:27:57,597 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 289 transitions. Word has length 96 [2022-07-12 18:27:57,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:57,597 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 289 transitions. [2022-07-12 18:27:57,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.696969696969697) internal successors, (244), 66 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:57,597 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 289 transitions. [2022-07-12 18:27:57,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-12 18:27:57,598 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:57,598 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:57,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-12 18:27:57,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:57,807 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:27:57,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:57,807 INFO L85 PathProgramCache]: Analyzing trace with hash 105215568, now seen corresponding path program 15 times [2022-07-12 18:27:57,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:57,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718014581] [2022-07-12 18:27:57,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:57,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:57,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:58,187 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 37 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:58,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:58,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718014581] [2022-07-12 18:27:58,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718014581] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:27:58,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497490385] [2022-07-12 18:27:58,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:27:58,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:58,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:27:58,189 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:27:58,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-12 18:27:58,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-12 18:27:58,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:27:58,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-12 18:27:58,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:58,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:27:58,720 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-07-12 18:27:58,720 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 21 treesize of output 20 [2022-07-12 18:27:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 37 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:58,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:27:58,886 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 13 [2022-07-12 18:27:58,887 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 26 treesize of output 22 [2022-07-12 18:27:59,112 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 37 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:59,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497490385] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:27:59,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:27:59,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 45 [2022-07-12 18:27:59,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011553657] [2022-07-12 18:27:59,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:27:59,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-12 18:27:59,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:59,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-12 18:27:59,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1857, Unknown=0, NotChecked=0, Total=1980 [2022-07-12 18:27:59,114 INFO L87 Difference]: Start difference. First operand 252 states and 289 transitions. Second operand has 45 states, 45 states have (on average 3.4444444444444446) internal successors, (155), 45 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:00,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:28:00,246 INFO L93 Difference]: Finished difference Result 310 states and 353 transitions. [2022-07-12 18:28:00,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-12 18:28:00,247 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.4444444444444446) internal successors, (155), 45 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2022-07-12 18:28:00,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:28:00,248 INFO L225 Difference]: With dead ends: 310 [2022-07-12 18:28:00,248 INFO L226 Difference]: Without dead ends: 207 [2022-07-12 18:28:00,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 166 SyntacticMatches, 8 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=325, Invalid=4231, Unknown=0, NotChecked=0, Total=4556 [2022-07-12 18:28:00,248 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 301 mSDsluCounter, 1330 mSDsCounter, 0 mSdLazyCounter, 1913 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 2072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:28:00,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 1380 Invalid, 2072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1913 Invalid, 0 Unknown, 61 Unchecked, 0.6s Time] [2022-07-12 18:28:00,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-07-12 18:28:00,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 204. [2022-07-12 18:28:00,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.1428571428571428) internal successors, (232), 203 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:00,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 232 transitions. [2022-07-12 18:28:00,251 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 232 transitions. Word has length 96 [2022-07-12 18:28:00,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:28:00,251 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 232 transitions. [2022-07-12 18:28:00,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.4444444444444446) internal successors, (155), 45 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:00,251 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 232 transitions. [2022-07-12 18:28:00,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-12 18:28:00,251 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:28:00,251 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:28:00,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-12 18:28:00,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-07-12 18:28:00,459 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:28:00,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:28:00,460 INFO L85 PathProgramCache]: Analyzing trace with hash -441577005, now seen corresponding path program 16 times [2022-07-12 18:28:00,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:28:00,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932413059] [2022-07-12 18:28:00,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:28:00,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:28:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:28:00,759 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 120 proven. 305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:00,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:28:00,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932413059] [2022-07-12 18:28:00,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932413059] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:28:00,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67299371] [2022-07-12 18:28:00,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:28:00,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:28:00,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:28:00,761 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:28:00,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-12 18:28:00,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:28:00,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:28:00,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-12 18:28:00,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:28:01,220 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 153 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:01,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:28:01,514 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 [2022-07-12 18:28:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 153 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:01,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67299371] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:28:01,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:28:01,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 25] total 50 [2022-07-12 18:28:01,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804844684] [2022-07-12 18:28:01,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:28:01,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-12 18:28:01,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:28:01,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-12 18:28:01,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=2281, Unknown=0, NotChecked=0, Total=2550 [2022-07-12 18:28:01,562 INFO L87 Difference]: Start difference. First operand 204 states and 232 transitions. Second operand has 51 states, 50 states have (on average 4.08) internal successors, (204), 51 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:02,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:28:02,533 INFO L93 Difference]: Finished difference Result 230 states and 262 transitions. [2022-07-12 18:28:02,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-12 18:28:02,534 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 4.08) internal successors, (204), 51 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2022-07-12 18:28:02,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:28:02,534 INFO L225 Difference]: With dead ends: 230 [2022-07-12 18:28:02,534 INFO L226 Difference]: Without dead ends: 230 [2022-07-12 18:28:02,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=968, Invalid=4288, Unknown=0, NotChecked=0, Total=5256 [2022-07-12 18:28:02,535 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 867 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:28:02,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [867 Valid, 963 Invalid, 1630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1524 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 18:28:02,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-07-12 18:28:02,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 176. [2022-07-12 18:28:02,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.1314285714285715) internal successors, (198), 175 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:02,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 198 transitions. [2022-07-12 18:28:02,537 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 198 transitions. Word has length 100 [2022-07-12 18:28:02,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:28:02,537 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 198 transitions. [2022-07-12 18:28:02,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 4.08) internal successors, (204), 51 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:02,538 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 198 transitions. [2022-07-12 18:28:02,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-12 18:28:02,538 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:28:02,538 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:28:02,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-12 18:28:02,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-12 18:28:02,747 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:28:02,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:28:02,748 INFO L85 PathProgramCache]: Analyzing trace with hash -997573781, now seen corresponding path program 17 times [2022-07-12 18:28:02,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:28:02,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165916492] [2022-07-12 18:28:02,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:28:02,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:28:02,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:28:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 41 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:03,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:28:03,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165916492] [2022-07-12 18:28:03,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165916492] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:28:03,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790003550] [2022-07-12 18:28:03,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:28:03,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:28:03,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:28:03,126 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:28:03,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-12 18:28:03,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-12 18:28:03,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:28:03,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-12 18:28:03,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:28:03,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:28:03,701 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-12 18:28:03,701 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 22 treesize of output 21 [2022-07-12 18:28:03,781 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 [2022-07-12 18:28:03,783 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 41 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:03,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:28:03,892 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 13 [2022-07-12 18:28:03,893 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 26 treesize of output 22 [2022-07-12 18:28:04,062 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 41 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:04,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790003550] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:28:04,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:28:04,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 47 [2022-07-12 18:28:04,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024861029] [2022-07-12 18:28:04,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:28:04,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-12 18:28:04,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:28:04,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-12 18:28:04,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2036, Unknown=0, NotChecked=0, Total=2162 [2022-07-12 18:28:04,063 INFO L87 Difference]: Start difference. First operand 176 states and 198 transitions. Second operand has 47 states, 47 states have (on average 3.617021276595745) internal successors, (170), 47 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:05,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:28:05,709 INFO L93 Difference]: Finished difference Result 356 states and 403 transitions. [2022-07-12 18:28:05,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-12 18:28:05,709 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.617021276595745) internal successors, (170), 47 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2022-07-12 18:28:05,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:28:05,710 INFO L225 Difference]: With dead ends: 356 [2022-07-12 18:28:05,710 INFO L226 Difference]: Without dead ends: 183 [2022-07-12 18:28:05,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 188 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=497, Invalid=6145, Unknown=0, NotChecked=0, Total=6642 [2022-07-12 18:28:05,711 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 589 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 2350 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 1638 SdHoareTripleChecker+Invalid, 2550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 2350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 18:28:05,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 1638 Invalid, 2550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 2350 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-12 18:28:05,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-07-12 18:28:05,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2022-07-12 18:28:05,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.1284916201117319) internal successors, (202), 179 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:05,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 202 transitions. [2022-07-12 18:28:05,713 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 202 transitions. Word has length 105 [2022-07-12 18:28:05,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:28:05,713 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 202 transitions. [2022-07-12 18:28:05,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.617021276595745) internal successors, (170), 47 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:05,713 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 202 transitions. [2022-07-12 18:28:05,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-12 18:28:05,713 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:28:05,714 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:28:05,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-12 18:28:05,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-12 18:28:05,920 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:28:05,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:28:05,921 INFO L85 PathProgramCache]: Analyzing trace with hash 859104072, now seen corresponding path program 18 times [2022-07-12 18:28:05,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:28:05,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035280636] [2022-07-12 18:28:05,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:28:05,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:28:05,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:28:06,303 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 153 proven. 364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:06,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:28:06,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035280636] [2022-07-12 18:28:06,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035280636] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:28:06,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130642163] [2022-07-12 18:28:06,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:28:06,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:28:06,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:28:06,305 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:28:06,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-12 18:28:06,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-07-12 18:28:06,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:28:06,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-12 18:28:06,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:28:06,976 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 190 proven. 327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:06,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:28:07,306 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 7 treesize of output 5 [2022-07-12 18:28:07,341 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 190 proven. 327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:07,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130642163] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:28:07,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:28:07,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 66 [2022-07-12 18:28:07,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930703337] [2022-07-12 18:28:07,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:28:07,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-12 18:28:07,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:28:07,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-12 18:28:07,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=3758, Unknown=0, NotChecked=0, Total=4422 [2022-07-12 18:28:07,344 INFO L87 Difference]: Start difference. First operand 180 states and 202 transitions. Second operand has 67 states, 66 states have (on average 4.166666666666667) internal successors, (275), 67 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:07,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:28:07,955 INFO L93 Difference]: Finished difference Result 204 states and 230 transitions. [2022-07-12 18:28:07,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 18:28:07,955 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 4.166666666666667) internal successors, (275), 67 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-07-12 18:28:07,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:28:07,956 INFO L225 Difference]: With dead ends: 204 [2022-07-12 18:28:07,956 INFO L226 Difference]: Without dead ends: 204 [2022-07-12 18:28:07,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1782 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1271, Invalid=5209, Unknown=0, NotChecked=0, Total=6480 [2022-07-12 18:28:07,957 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 1282 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 1112 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1282 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 1112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:28:07,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1282 Valid, 752 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 1112 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:28:07,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-07-12 18:28:07,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 192. [2022-07-12 18:28:07,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.130890052356021) internal successors, (216), 191 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:07,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 216 transitions. [2022-07-12 18:28:07,960 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 216 transitions. Word has length 109 [2022-07-12 18:28:07,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:28:07,960 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 216 transitions. [2022-07-12 18:28:07,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 4.166666666666667) internal successors, (275), 67 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:07,960 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 216 transitions. [2022-07-12 18:28:07,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-12 18:28:07,961 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:28:07,961 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:28:07,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-12 18:28:08,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:28:08,174 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:28:08,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:28:08,174 INFO L85 PathProgramCache]: Analyzing trace with hash -2093452996, now seen corresponding path program 19 times [2022-07-12 18:28:08,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:28:08,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095750569] [2022-07-12 18:28:08,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:28:08,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:28:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:28:08,563 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 45 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:08,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:28:08,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095750569] [2022-07-12 18:28:08,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095750569] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:28:08,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128639048] [2022-07-12 18:28:08,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:28:08,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:28:08,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:28:08,564 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:28:08,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-12 18:28:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:28:08,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-12 18:28:08,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:28:09,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:28:09,217 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 18 [2022-07-12 18:28:09,678 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 [2022-07-12 18:28:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 45 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:09,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:28:09,808 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 13 [2022-07-12 18:28:09,810 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 26 treesize of output 22 [2022-07-12 18:28:10,355 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 45 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:10,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128639048] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:28:10,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:28:10,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 74 [2022-07-12 18:28:10,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184902726] [2022-07-12 18:28:10,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:28:10,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-07-12 18:28:10,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:28:10,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-07-12 18:28:10,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=5183, Unknown=0, NotChecked=0, Total=5402 [2022-07-12 18:28:10,358 INFO L87 Difference]: Start difference. First operand 192 states and 216 transitions. Second operand has 74 states, 74 states have (on average 3.6486486486486487) internal successors, (270), 74 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:11,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:28:11,752 INFO L93 Difference]: Finished difference Result 333 states and 377 transitions. [2022-07-12 18:28:11,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-12 18:28:11,753 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.6486486486486487) internal successors, (270), 74 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2022-07-12 18:28:11,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:28:11,753 INFO L225 Difference]: With dead ends: 333 [2022-07-12 18:28:11,754 INFO L226 Difference]: Without dead ends: 199 [2022-07-12 18:28:11,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=491, Invalid=9609, Unknown=0, NotChecked=0, Total=10100 [2022-07-12 18:28:11,755 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 586 mSDsluCounter, 2444 mSDsCounter, 0 mSdLazyCounter, 3424 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 2504 SdHoareTripleChecker+Invalid, 3698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 3424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 18:28:11,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [586 Valid, 2504 Invalid, 3698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 3424 Invalid, 0 Unknown, 81 Unchecked, 0.7s Time] [2022-07-12 18:28:11,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-12 18:28:11,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 196. [2022-07-12 18:28:11,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.1282051282051282) internal successors, (220), 195 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:11,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 220 transitions. [2022-07-12 18:28:11,788 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 220 transitions. Word has length 114 [2022-07-12 18:28:11,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:28:11,788 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 220 transitions. [2022-07-12 18:28:11,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.6486486486486487) internal successors, (270), 74 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:11,788 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 220 transitions. [2022-07-12 18:28:11,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-12 18:28:11,789 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:28:11,789 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:28:11,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-12 18:28:11,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-12 18:28:11,989 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:28:11,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:28:11,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1073720833, now seen corresponding path program 20 times [2022-07-12 18:28:11,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:28:11,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571412246] [2022-07-12 18:28:11,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:28:11,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:28:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:28:12,300 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 190 proven. 428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:12,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:28:12,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571412246] [2022-07-12 18:28:12,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571412246] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:28:12,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089305059] [2022-07-12 18:28:12,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:28:12,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:28:12,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:28:12,302 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:28:12,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-12 18:28:12,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:28:12,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:28:12,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-12 18:28:12,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:28:12,833 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 231 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:12,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:28:13,265 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 [2022-07-12 18:28:13,303 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 231 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:13,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089305059] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:28:13,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:28:13,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29, 29] total 58 [2022-07-12 18:28:13,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958394219] [2022-07-12 18:28:13,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:28:13,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-12 18:28:13,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:28:13,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-12 18:28:13,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=3070, Unknown=0, NotChecked=0, Total=3422 [2022-07-12 18:28:13,305 INFO L87 Difference]: Start difference. First operand 196 states and 220 transitions. Second operand has 59 states, 58 states have (on average 4.172413793103448) internal successors, (242), 59 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:14,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:28:14,182 INFO L93 Difference]: Finished difference Result 220 states and 248 transitions. [2022-07-12 18:28:14,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 18:28:14,182 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 4.172413793103448) internal successors, (242), 59 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2022-07-12 18:28:14,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:28:14,183 INFO L225 Difference]: With dead ends: 220 [2022-07-12 18:28:14,183 INFO L226 Difference]: Without dead ends: 220 [2022-07-12 18:28:14,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 202 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1307, Invalid=5833, Unknown=0, NotChecked=0, Total=7140 [2022-07-12 18:28:14,184 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 1101 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 1841 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1101 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 1960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:28:14,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1101 Valid, 1180 Invalid, 1960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1841 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:28:14,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-07-12 18:28:14,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 208. [2022-07-12 18:28:14,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.1304347826086956) internal successors, (234), 207 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:14,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 234 transitions. [2022-07-12 18:28:14,187 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 234 transitions. Word has length 118 [2022-07-12 18:28:14,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:28:14,188 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 234 transitions. [2022-07-12 18:28:14,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 4.172413793103448) internal successors, (242), 59 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:14,188 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 234 transitions. [2022-07-12 18:28:14,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-12 18:28:14,188 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:28:14,189 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:28:14,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-12 18:28:14,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-12 18:28:14,405 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:28:14,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:28:14,406 INFO L85 PathProgramCache]: Analyzing trace with hash 715693285, now seen corresponding path program 21 times [2022-07-12 18:28:14,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:28:14,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197865293] [2022-07-12 18:28:14,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:28:14,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:28:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:28:14,965 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 49 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:14,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:28:14,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197865293] [2022-07-12 18:28:14,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197865293] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:28:14,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984553970] [2022-07-12 18:28:14,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:28:14,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:28:14,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:28:14,967 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:28:14,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-12 18:28:15,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-07-12 18:28:15,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:28:15,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 100 conjunts are in the unsatisfiable core [2022-07-12 18:28:15,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:28:15,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:28:15,619 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-12 18:28:15,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-07-12 18:28:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 49 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:15,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:28:15,871 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 13 [2022-07-12 18:28:15,872 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 26 treesize of output 22 [2022-07-12 18:28:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 49 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:16,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984553970] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:28:16,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:28:16,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 54 [2022-07-12 18:28:16,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814909742] [2022-07-12 18:28:16,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:28:16,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-12 18:28:16,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:28:16,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-12 18:28:16,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2718, Unknown=0, NotChecked=0, Total=2862 [2022-07-12 18:28:16,197 INFO L87 Difference]: Start difference. First operand 208 states and 234 transitions. Second operand has 54 states, 54 states have (on average 3.6666666666666665) internal successors, (198), 54 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:17,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:28:17,853 INFO L93 Difference]: Finished difference Result 361 states and 409 transitions. [2022-07-12 18:28:17,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 18:28:17,853 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.6666666666666665) internal successors, (198), 54 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2022-07-12 18:28:17,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:28:17,860 INFO L225 Difference]: With dead ends: 361 [2022-07-12 18:28:17,860 INFO L226 Difference]: Without dead ends: 215 [2022-07-12 18:28:17,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 215 SyntacticMatches, 10 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=391, Invalid=6415, Unknown=0, NotChecked=0, Total=6806 [2022-07-12 18:28:17,862 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 298 mSDsluCounter, 2149 mSDsCounter, 0 mSdLazyCounter, 3097 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 2214 SdHoareTripleChecker+Invalid, 3272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 3097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 18:28:17,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 2214 Invalid, 3272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 3097 Invalid, 0 Unknown, 75 Unchecked, 0.9s Time] [2022-07-12 18:28:17,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-07-12 18:28:17,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 212. [2022-07-12 18:28:17,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.127962085308057) internal successors, (238), 211 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:17,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 238 transitions. [2022-07-12 18:28:17,867 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 238 transitions. Word has length 123 [2022-07-12 18:28:17,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:28:17,867 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 238 transitions. [2022-07-12 18:28:17,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.6666666666666665) internal successors, (198), 54 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:17,868 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 238 transitions. [2022-07-12 18:28:17,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-12 18:28:17,868 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:28:17,868 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:28:17,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-12 18:28:18,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-12 18:28:18,074 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:28:18,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:28:18,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1263671422, now seen corresponding path program 22 times [2022-07-12 18:28:18,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:28:18,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696242014] [2022-07-12 18:28:18,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:28:18,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:28:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:28:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 231 proven. 497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:18,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:28:18,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696242014] [2022-07-12 18:28:18,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696242014] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:28:18,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640680349] [2022-07-12 18:28:18,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:28:18,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:28:18,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:28:18,519 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:28:18,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-12 18:28:18,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:28:18,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:28:18,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-12 18:28:18,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:28:19,194 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 276 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:19,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:28:19,856 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 [2022-07-12 18:28:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 276 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:19,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640680349] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:28:19,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:28:19,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 31, 31] total 62 [2022-07-12 18:28:19,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536485363] [2022-07-12 18:28:19,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:28:19,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-12 18:28:19,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:28:19,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-12 18:28:19,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=3508, Unknown=0, NotChecked=0, Total=3906 [2022-07-12 18:28:19,926 INFO L87 Difference]: Start difference. First operand 212 states and 238 transitions. Second operand has 63 states, 62 states have (on average 4.193548387096774) internal successors, (260), 63 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:21,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:28:21,083 INFO L93 Difference]: Finished difference Result 236 states and 266 transitions. [2022-07-12 18:28:21,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-12 18:28:21,083 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 4.193548387096774) internal successors, (260), 63 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2022-07-12 18:28:21,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:28:21,084 INFO L225 Difference]: With dead ends: 236 [2022-07-12 18:28:21,084 INFO L226 Difference]: Without dead ends: 236 [2022-07-12 18:28:21,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 218 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1496, Invalid=6694, Unknown=0, NotChecked=0, Total=8190 [2022-07-12 18:28:21,085 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 1384 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 2047 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1384 SdHoareTripleChecker+Valid, 1328 SdHoareTripleChecker+Invalid, 2206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 2047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:28:21,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1384 Valid, 1328 Invalid, 2206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 2047 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 18:28:21,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-07-12 18:28:21,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 224. [2022-07-12 18:28:21,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.1300448430493273) internal successors, (252), 223 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:21,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 252 transitions. [2022-07-12 18:28:21,088 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 252 transitions. Word has length 127 [2022-07-12 18:28:21,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:28:21,088 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 252 transitions. [2022-07-12 18:28:21,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 4.193548387096774) internal successors, (260), 63 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:21,088 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 252 transitions. [2022-07-12 18:28:21,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-12 18:28:21,089 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:28:21,089 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:28:21,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-12 18:28:21,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:28:21,306 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:28:21,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:28:21,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1002111298, now seen corresponding path program 23 times [2022-07-12 18:28:21,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:28:21,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618705198] [2022-07-12 18:28:21,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:28:21,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:28:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:28:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 53 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:21,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:28:21,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618705198] [2022-07-12 18:28:21,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618705198] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:28:21,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244045057] [2022-07-12 18:28:21,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:28:21,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:28:21,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:28:21,970 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:28:21,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-12 18:28:22,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-07-12 18:28:22,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:28:22,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 106 conjunts are in the unsatisfiable core [2022-07-12 18:28:22,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:28:22,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:28:22,815 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-12 18:28:22,815 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 22 treesize of output 21 [2022-07-12 18:28:22,941 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 53 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:22,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:28:23,065 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 13 [2022-07-12 18:28:23,066 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 26 treesize of output 22 [2022-07-12 18:28:23,346 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 53 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:23,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244045057] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:28:23,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:28:23,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 57 [2022-07-12 18:28:23,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618883290] [2022-07-12 18:28:23,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:28:23,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-12 18:28:23,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:28:23,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-12 18:28:23,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=3041, Unknown=0, NotChecked=0, Total=3192 [2022-07-12 18:28:23,348 INFO L87 Difference]: Start difference. First operand 224 states and 252 transitions. Second operand has 57 states, 57 states have (on average 3.7017543859649122) internal successors, (211), 57 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:25,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:28:25,233 INFO L93 Difference]: Finished difference Result 389 states and 441 transitions. [2022-07-12 18:28:25,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-12 18:28:25,234 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.7017543859649122) internal successors, (211), 57 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2022-07-12 18:28:25,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:28:25,235 INFO L225 Difference]: With dead ends: 389 [2022-07-12 18:28:25,235 INFO L226 Difference]: Without dead ends: 231 [2022-07-12 18:28:25,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 233 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=413, Invalid=7243, Unknown=0, NotChecked=0, Total=7656 [2022-07-12 18:28:25,236 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 323 mSDsluCounter, 2625 mSDsCounter, 0 mSdLazyCounter, 3706 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 2695 SdHoareTripleChecker+Invalid, 3928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 3706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:28:25,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 2695 Invalid, 3928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 3706 Invalid, 0 Unknown, 113 Unchecked, 1.0s Time] [2022-07-12 18:28:25,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-12 18:28:25,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 228. [2022-07-12 18:28:25,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.1277533039647578) internal successors, (256), 227 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:25,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 256 transitions. [2022-07-12 18:28:25,238 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 256 transitions. Word has length 132 [2022-07-12 18:28:25,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:28:25,238 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 256 transitions. [2022-07-12 18:28:25,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.7017543859649122) internal successors, (211), 57 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:25,239 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 256 transitions. [2022-07-12 18:28:25,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-12 18:28:25,239 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:28:25,239 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:28:25,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-12 18:28:25,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-07-12 18:28:25,458 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:28:25,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:28:25,458 INFO L85 PathProgramCache]: Analyzing trace with hash 856905541, now seen corresponding path program 24 times [2022-07-12 18:28:25,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:28:25,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122919804] [2022-07-12 18:28:25,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:28:25,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:28:25,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:28:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 276 proven. 571 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:25,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:28:25,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122919804] [2022-07-12 18:28:25,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122919804] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:28:25,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459606833] [2022-07-12 18:28:25,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:28:25,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:28:25,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:28:25,992 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:28:25,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-12 18:28:26,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-07-12 18:28:26,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:28:26,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-12 18:28:26,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:28:27,247 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 325 proven. 522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:27,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:28:27,782 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 16 treesize of output 12 [2022-07-12 18:28:28,299 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 378 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:28,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459606833] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:28:28,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:28:28,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 95 [2022-07-12 18:28:28,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369835526] [2022-07-12 18:28:28,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:28:28,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-07-12 18:28:28,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:28:28,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-07-12 18:28:28,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1254, Invalid=7866, Unknown=0, NotChecked=0, Total=9120 [2022-07-12 18:28:28,302 INFO L87 Difference]: Start difference. First operand 228 states and 256 transitions. Second operand has 96 states, 95 states have (on average 4.231578947368421) internal successors, (402), 96 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:29,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:28:29,138 INFO L93 Difference]: Finished difference Result 252 states and 284 transitions. [2022-07-12 18:28:29,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-12 18:28:29,138 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 4.231578947368421) internal successors, (402), 96 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2022-07-12 18:28:29,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:28:29,139 INFO L225 Difference]: With dead ends: 252 [2022-07-12 18:28:29,139 INFO L226 Difference]: Without dead ends: 252 [2022-07-12 18:28:29,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3903 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2384, Invalid=10272, Unknown=0, NotChecked=0, Total=12656 [2022-07-12 18:28:29,140 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 1442 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 1833 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1442 SdHoareTripleChecker+Valid, 1210 SdHoareTripleChecker+Invalid, 1999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:28:29,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1442 Valid, 1210 Invalid, 1999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1833 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:28:29,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-07-12 18:28:29,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 240. [2022-07-12 18:28:29,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.1297071129707112) internal successors, (270), 239 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:29,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 270 transitions. [2022-07-12 18:28:29,146 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 270 transitions. Word has length 136 [2022-07-12 18:28:29,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:28:29,147 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 270 transitions. [2022-07-12 18:28:29,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 4.231578947368421) internal successors, (402), 96 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:29,147 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 270 transitions. [2022-07-12 18:28:29,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-12 18:28:29,148 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:28:29,148 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:28:29,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-07-12 18:28:29,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:28:29,357 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:28:29,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:28:29,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1423707297, now seen corresponding path program 25 times [2022-07-12 18:28:29,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:28:29,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386746141] [2022-07-12 18:28:29,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:28:29,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:28:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:28:29,875 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 57 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:29,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:28:29,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386746141] [2022-07-12 18:28:29,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386746141] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:28:29,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116595464] [2022-07-12 18:28:29,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:28:29,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:28:29,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:28:29,876 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:28:29,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-12 18:28:30,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:28:30,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 110 conjunts are in the unsatisfiable core [2022-07-12 18:28:30,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:28:30,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:28:30,665 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-12 18:28:30,666 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 22 treesize of output 21 [2022-07-12 18:28:30,763 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 [2022-07-12 18:28:30,764 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 57 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:30,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:28:30,907 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 13 [2022-07-12 18:28:30,908 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 26 treesize of output 22 [2022-07-12 18:28:31,248 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 57 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:31,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116595464] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:28:31,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:28:31,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 59 [2022-07-12 18:28:31,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527500620] [2022-07-12 18:28:31,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:28:31,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-12 18:28:31,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:28:31,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-12 18:28:31,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=3268, Unknown=0, NotChecked=0, Total=3422 [2022-07-12 18:28:31,249 INFO L87 Difference]: Start difference. First operand 240 states and 270 transitions. Second operand has 59 states, 59 states have (on average 3.76271186440678) internal successors, (222), 59 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:32,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:28:32,764 INFO L93 Difference]: Finished difference Result 417 states and 473 transitions. [2022-07-12 18:28:32,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-12 18:28:32,764 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.76271186440678) internal successors, (222), 59 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2022-07-12 18:28:32,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:28:32,765 INFO L225 Difference]: With dead ends: 417 [2022-07-12 18:28:32,765 INFO L226 Difference]: Without dead ends: 247 [2022-07-12 18:28:32,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 251 SyntacticMatches, 9 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=430, Invalid=7942, Unknown=0, NotChecked=0, Total=8372 [2022-07-12 18:28:32,766 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 525 mSDsluCounter, 2804 mSDsCounter, 0 mSdLazyCounter, 3910 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 2879 SdHoareTripleChecker+Invalid, 4249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 3910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 18:28:32,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 2879 Invalid, 4249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 3910 Invalid, 0 Unknown, 163 Unchecked, 0.8s Time] [2022-07-12 18:28:32,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-07-12 18:28:32,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 244. [2022-07-12 18:28:32,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.1275720164609053) internal successors, (274), 243 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:32,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 274 transitions. [2022-07-12 18:28:32,769 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 274 transitions. Word has length 141 [2022-07-12 18:28:32,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:28:32,769 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 274 transitions. [2022-07-12 18:28:32,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.76271186440678) internal successors, (222), 59 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:32,770 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 274 transitions. [2022-07-12 18:28:32,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-07-12 18:28:32,770 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:28:32,771 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:28:32,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-12 18:28:32,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-07-12 18:28:32,988 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:28:32,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:28:32,988 INFO L85 PathProgramCache]: Analyzing trace with hash -5721924, now seen corresponding path program 26 times [2022-07-12 18:28:32,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:28:32,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703468628] [2022-07-12 18:28:32,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:28:32,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:28:33,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:28:33,508 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 325 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:33,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:28:33,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703468628] [2022-07-12 18:28:33,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703468628] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:28:33,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413734764] [2022-07-12 18:28:33,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:28:33,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:28:33,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:28:33,511 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:28:33,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-12 18:28:33,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:28:33,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:28:33,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 93 conjunts are in the unsatisfiable core [2022-07-12 18:28:33,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:28:33,667 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 [2022-07-12 18:28:34,871 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 378 proven. 597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:34,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:28:36,449 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 435 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:36,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413734764] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:28:36,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:28:36,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 34] total 98 [2022-07-12 18:28:36,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331455888] [2022-07-12 18:28:36,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:28:36,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-07-12 18:28:36,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:28:36,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-07-12 18:28:36,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1060, Invalid=8642, Unknown=0, NotChecked=0, Total=9702 [2022-07-12 18:28:36,452 INFO L87 Difference]: Start difference. First operand 244 states and 274 transitions. Second operand has 99 states, 98 states have (on average 4.326530612244898) internal successors, (424), 99 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:37,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:28:37,924 INFO L93 Difference]: Finished difference Result 268 states and 302 transitions. [2022-07-12 18:28:37,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-12 18:28:37,925 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 98 states have (on average 4.326530612244898) internal successors, (424), 99 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2022-07-12 18:28:37,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:28:37,929 INFO L225 Difference]: With dead ends: 268 [2022-07-12 18:28:37,929 INFO L226 Difference]: Without dead ends: 268 [2022-07-12 18:28:37,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4002 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2859, Invalid=14171, Unknown=0, NotChecked=0, Total=17030 [2022-07-12 18:28:37,931 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 1638 mSDsluCounter, 1908 mSDsCounter, 0 mSdLazyCounter, 2947 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1638 SdHoareTripleChecker+Valid, 1991 SdHoareTripleChecker+Invalid, 3156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 2947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 18:28:37,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1638 Valid, 1991 Invalid, 3156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 2947 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 18:28:37,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-07-12 18:28:37,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 256. [2022-07-12 18:28:37,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.1294117647058823) internal successors, (288), 255 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:37,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 288 transitions. [2022-07-12 18:28:37,935 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 288 transitions. Word has length 145 [2022-07-12 18:28:37,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:28:37,936 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 288 transitions. [2022-07-12 18:28:37,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 98 states have (on average 4.326530612244898) internal successors, (424), 99 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:37,936 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 288 transitions. [2022-07-12 18:28:37,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-12 18:28:37,937 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:28:37,937 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:28:37,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-12 18:28:38,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:28:38,154 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:28:38,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:28:38,155 INFO L85 PathProgramCache]: Analyzing trace with hash 504294472, now seen corresponding path program 27 times [2022-07-12 18:28:38,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:28:38,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31538846] [2022-07-12 18:28:38,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:28:38,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:28:38,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:28:38,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 61 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:38,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:28:38,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31538846] [2022-07-12 18:28:38,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31538846] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:28:38,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222517765] [2022-07-12 18:28:38,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:28:38,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:28:38,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:28:38,988 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:28:38,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-12 18:28:39,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-07-12 18:28:39,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:28:39,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 116 conjunts are in the unsatisfiable core [2022-07-12 18:28:39,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:28:39,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:28:40,066 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-12 18:28:40,067 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 22 treesize of output 21 [2022-07-12 18:28:40,174 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 [2022-07-12 18:28:40,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 61 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:40,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:28:40,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:28:40,333 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 26 treesize of output 22 [2022-07-12 18:28:40,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 61 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:40,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222517765] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:28:40,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:28:40,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 38, 38] total 64 [2022-07-12 18:28:40,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950317873] [2022-07-12 18:28:40,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:28:40,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-12 18:28:40,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:28:40,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-12 18:28:40,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3865, Unknown=0, NotChecked=0, Total=4032 [2022-07-12 18:28:40,775 INFO L87 Difference]: Start difference. First operand 256 states and 288 transitions. Second operand has 64 states, 64 states have (on average 3.671875) internal successors, (235), 64 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:43,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:28:43,197 INFO L93 Difference]: Finished difference Result 445 states and 505 transitions. [2022-07-12 18:28:43,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-12 18:28:43,197 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.671875) internal successors, (235), 64 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2022-07-12 18:28:43,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:28:43,198 INFO L225 Difference]: With dead ends: 445 [2022-07-12 18:28:43,198 INFO L226 Difference]: Without dead ends: 263 [2022-07-12 18:28:43,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 266 SyntacticMatches, 11 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=462, Invalid=9240, Unknown=0, NotChecked=0, Total=9702 [2022-07-12 18:28:43,199 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 280 mSDsluCounter, 3517 mSDsCounter, 0 mSdLazyCounter, 5098 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 3597 SdHoareTripleChecker+Invalid, 5272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 5098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:28:43,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 3597 Invalid, 5272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 5098 Invalid, 0 Unknown, 78 Unchecked, 1.4s Time] [2022-07-12 18:28:43,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-07-12 18:28:43,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 260. [2022-07-12 18:28:43,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.1274131274131274) internal successors, (292), 259 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:43,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 292 transitions. [2022-07-12 18:28:43,203 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 292 transitions. Word has length 150 [2022-07-12 18:28:43,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:28:43,203 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 292 transitions. [2022-07-12 18:28:43,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.671875) internal successors, (235), 64 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:43,203 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 292 transitions. [2022-07-12 18:28:43,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-07-12 18:28:43,204 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:28:43,204 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:28:43,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-12 18:28:43,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-12 18:28:43,422 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:28:43,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:28:43,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1791170677, now seen corresponding path program 28 times [2022-07-12 18:28:43,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:28:43,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654511878] [2022-07-12 18:28:43,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:28:43,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:28:43,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:28:44,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 378 proven. 734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:44,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:28:44,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654511878] [2022-07-12 18:28:44,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654511878] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:28:44,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864507713] [2022-07-12 18:28:44,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:28:44,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:28:44,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:28:44,021 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:28:44,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-12 18:28:44,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:28:44,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:28:44,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 99 conjunts are in the unsatisfiable core [2022-07-12 18:28:44,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:28:45,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 435 proven. 677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:45,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:28:45,705 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 [2022-07-12 18:28:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 435 proven. 677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:46,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864507713] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:28:46,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:28:46,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36, 36] total 89 [2022-07-12 18:28:46,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974958335] [2022-07-12 18:28:46,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:28:46,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-07-12 18:28:46,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:28:46,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-07-12 18:28:46,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=7175, Unknown=0, NotChecked=0, Total=8010 [2022-07-12 18:28:46,486 INFO L87 Difference]: Start difference. First operand 260 states and 292 transitions. Second operand has 90 states, 89 states have (on average 4.269662921348314) internal successors, (380), 90 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:48,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:28:48,272 INFO L93 Difference]: Finished difference Result 284 states and 320 transitions. [2022-07-12 18:28:48,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-12 18:28:48,273 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 89 states have (on average 4.269662921348314) internal successors, (380), 90 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2022-07-12 18:28:48,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:28:48,273 INFO L225 Difference]: With dead ends: 284 [2022-07-12 18:28:48,274 INFO L226 Difference]: Without dead ends: 284 [2022-07-12 18:28:48,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2630 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2878, Invalid=12374, Unknown=0, NotChecked=0, Total=15252 [2022-07-12 18:28:48,275 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 1570 mSDsluCounter, 1741 mSDsCounter, 0 mSdLazyCounter, 2872 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1570 SdHoareTripleChecker+Valid, 1829 SdHoareTripleChecker+Invalid, 3060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 2872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 18:28:48,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1570 Valid, 1829 Invalid, 3060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 2872 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-12 18:28:48,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-07-12 18:28:48,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 272. [2022-07-12 18:28:48,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.1291512915129152) internal successors, (306), 271 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:48,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 306 transitions. [2022-07-12 18:28:48,294 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 306 transitions. Word has length 154 [2022-07-12 18:28:48,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:28:48,295 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 306 transitions. [2022-07-12 18:28:48,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 89 states have (on average 4.269662921348314) internal successors, (380), 90 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:48,295 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 306 transitions. [2022-07-12 18:28:48,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-07-12 18:28:48,311 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:28:48,311 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:28:48,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-12 18:28:48,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-07-12 18:28:48,527 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:28:48,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:28:48,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1810341593, now seen corresponding path program 29 times [2022-07-12 18:28:48,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:28:48,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862776102] [2022-07-12 18:28:48,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:28:48,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:28:48,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:28:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 65 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:49,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:28:49,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862776102] [2022-07-12 18:28:49,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862776102] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:28:49,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237561452] [2022-07-12 18:28:49,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:28:49,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:28:49,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:28:49,052 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:28:49,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-12 18:28:49,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-07-12 18:28:49,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:28:49,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 122 conjunts are in the unsatisfiable core [2022-07-12 18:28:49,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:28:49,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:28:49,941 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-12 18:28:49,941 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 22 treesize of output 21 [2022-07-12 18:28:50,026 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 [2022-07-12 18:28:50,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 65 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:50,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:28:50,130 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 13 [2022-07-12 18:28:50,131 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 26 treesize of output 22 [2022-07-12 18:28:50,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 65 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:50,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237561452] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:28:50,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:28:50,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 65 [2022-07-12 18:28:50,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151540148] [2022-07-12 18:28:50,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:28:50,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-12 18:28:50,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:28:50,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-12 18:28:50,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3992, Unknown=0, NotChecked=0, Total=4160 [2022-07-12 18:28:50,425 INFO L87 Difference]: Start difference. First operand 272 states and 306 transitions. Second operand has 65 states, 65 states have (on average 3.8153846153846156) internal successors, (248), 65 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:52,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:28:52,946 INFO L93 Difference]: Finished difference Result 560 states and 637 transitions. [2022-07-12 18:28:52,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-12 18:28:52,946 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.8153846153846156) internal successors, (248), 65 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2022-07-12 18:28:52,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:28:52,965 INFO L225 Difference]: With dead ends: 560 [2022-07-12 18:28:52,965 INFO L226 Difference]: Without dead ends: 279 [2022-07-12 18:28:52,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 283 SyntacticMatches, 11 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2064 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=719, Invalid=13087, Unknown=0, NotChecked=0, Total=13806 [2022-07-12 18:28:52,967 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 1028 mSDsluCounter, 3926 mSDsCounter, 0 mSdLazyCounter, 5506 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1028 SdHoareTripleChecker+Valid, 4011 SdHoareTripleChecker+Invalid, 6145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 5506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:28:52,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1028 Valid, 4011 Invalid, 6145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 5506 Invalid, 0 Unknown, 269 Unchecked, 1.3s Time] [2022-07-12 18:28:52,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-07-12 18:28:52,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 276. [2022-07-12 18:28:52,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.1272727272727272) internal successors, (310), 275 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:52,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 310 transitions. [2022-07-12 18:28:52,970 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 310 transitions. Word has length 159 [2022-07-12 18:28:52,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:28:52,970 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 310 transitions. [2022-07-12 18:28:52,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.8153846153846156) internal successors, (248), 65 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:52,971 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 310 transitions. [2022-07-12 18:28:52,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-12 18:28:52,971 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:28:52,971 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:28:52,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-07-12 18:28:53,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-07-12 18:28:53,176 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:28:53,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:28:53,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1468227850, now seen corresponding path program 30 times [2022-07-12 18:28:53,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:28:53,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066102933] [2022-07-12 18:28:53,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:28:53,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:28:53,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:28:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1258 backedges. 435 proven. 823 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:53,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:28:53,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066102933] [2022-07-12 18:28:53,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066102933] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:28:53,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818980449] [2022-07-12 18:28:53,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:28:53,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:28:53,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:28:53,852 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:28:53,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-12 18:28:54,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-07-12 18:28:54,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:28:54,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 87 conjunts are in the unsatisfiable core [2022-07-12 18:28:54,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:28:54,745 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 [2022-07-12 18:28:56,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1258 backedges. 496 proven. 762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:56,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:28:57,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1258 backedges. 561 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:28:57,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818980449] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:28:57,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:28:57,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 112 [2022-07-12 18:28:57,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011576192] [2022-07-12 18:28:57,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:28:57,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-07-12 18:28:57,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:28:57,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-07-12 18:28:57,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1785, Invalid=10871, Unknown=0, NotChecked=0, Total=12656 [2022-07-12 18:28:57,956 INFO L87 Difference]: Start difference. First operand 276 states and 310 transitions. Second operand has 113 states, 112 states have (on average 4.3125) internal successors, (483), 113 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:59,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:28:59,039 INFO L93 Difference]: Finished difference Result 300 states and 338 transitions. [2022-07-12 18:28:59,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-12 18:28:59,039 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 112 states have (on average 4.3125) internal successors, (483), 113 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2022-07-12 18:28:59,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:28:59,040 INFO L225 Difference]: With dead ends: 300 [2022-07-12 18:28:59,040 INFO L226 Difference]: Without dead ends: 300 [2022-07-12 18:28:59,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5482 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3336, Invalid=14220, Unknown=0, NotChecked=0, Total=17556 [2022-07-12 18:28:59,042 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 1581 mSDsluCounter, 1434 mSDsCounter, 0 mSdLazyCounter, 2193 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1581 SdHoareTripleChecker+Valid, 1527 SdHoareTripleChecker+Invalid, 2371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 2193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:28:59,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1581 Valid, 1527 Invalid, 2371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 2193 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 18:28:59,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-07-12 18:28:59,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 288. [2022-07-12 18:28:59,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.1289198606271778) internal successors, (324), 287 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:59,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 324 transitions. [2022-07-12 18:28:59,044 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 324 transitions. Word has length 163 [2022-07-12 18:28:59,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:28:59,045 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 324 transitions. [2022-07-12 18:28:59,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 112 states have (on average 4.3125) internal successors, (483), 113 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:28:59,045 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 324 transitions. [2022-07-12 18:28:59,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-12 18:28:59,046 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:28:59,046 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:28:59,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-07-12 18:28:59,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-12 18:28:59,259 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:28:59,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:28:59,259 INFO L85 PathProgramCache]: Analyzing trace with hash -2055679410, now seen corresponding path program 31 times [2022-07-12 18:28:59,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:28:59,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818909183] [2022-07-12 18:28:59,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:28:59,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:28:59,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:29:00,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 69 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:29:00,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:29:00,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818909183] [2022-07-12 18:29:00,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818909183] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:29:00,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837446370] [2022-07-12 18:29:00,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:29:00,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:29:00,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:29:00,024 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:29:00,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-12 18:29:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:29:00,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 128 conjunts are in the unsatisfiable core [2022-07-12 18:29:00,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:29:00,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:29:00,953 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-12 18:29:00,953 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 22 treesize of output 21 [2022-07-12 18:29:01,056 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 [2022-07-12 18:29:01,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 69 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:29:01,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:29:01,199 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 13 [2022-07-12 18:29:01,207 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 26 treesize of output 22 [2022-07-12 18:29:01,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 69 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:29:01,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837446370] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:29:01,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:29:01,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 68 [2022-07-12 18:29:01,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50112508] [2022-07-12 18:29:01,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:29:01,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-12 18:29:01,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:29:01,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-12 18:29:01,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=4381, Unknown=0, NotChecked=0, Total=4556 [2022-07-12 18:29:01,610 INFO L87 Difference]: Start difference. First operand 288 states and 324 transitions. Second operand has 68 states, 68 states have (on average 3.838235294117647) internal successors, (261), 68 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:29:04,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:29:04,560 INFO L93 Difference]: Finished difference Result 594 states and 676 transitions. [2022-07-12 18:29:04,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-07-12 18:29:04,561 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.838235294117647) internal successors, (261), 68 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2022-07-12 18:29:04,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:29:04,562 INFO L225 Difference]: With dead ends: 594 [2022-07-12 18:29:04,562 INFO L226 Difference]: Without dead ends: 295 [2022-07-12 18:29:04,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 299 SyntacticMatches, 12 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2294 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=756, Invalid=14496, Unknown=0, NotChecked=0, Total=15252 [2022-07-12 18:29:04,563 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 1095 mSDsluCounter, 3837 mSDsCounter, 0 mSdLazyCounter, 5372 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 3927 SdHoareTripleChecker+Invalid, 5950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 5372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:29:04,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1095 Valid, 3927 Invalid, 5950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 5372 Invalid, 0 Unknown, 184 Unchecked, 1.4s Time] [2022-07-12 18:29:04,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-07-12 18:29:04,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 292. [2022-07-12 18:29:04,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.127147766323024) internal successors, (328), 291 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:29:04,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 328 transitions. [2022-07-12 18:29:04,566 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 328 transitions. Word has length 168 [2022-07-12 18:29:04,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:29:04,566 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 328 transitions. [2022-07-12 18:29:04,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.838235294117647) internal successors, (261), 68 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:29:04,567 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 328 transitions. [2022-07-12 18:29:04,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-07-12 18:29:04,567 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:29:04,567 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:29:04,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-12 18:29:04,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-12 18:29:04,785 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:29:04,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:29:04,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1289069265, now seen corresponding path program 32 times [2022-07-12 18:29:04,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:29:04,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950139877] [2022-07-12 18:29:04,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:29:04,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:29:04,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:29:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1413 backedges. 496 proven. 917 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:29:05,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:29:05,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950139877] [2022-07-12 18:29:05,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950139877] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:29:05,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74617175] [2022-07-12 18:29:05,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:29:05,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:29:05,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:29:05,525 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:29:05,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-12 18:29:05,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:29:05,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:29:05,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 105 conjunts are in the unsatisfiable core [2022-07-12 18:29:05,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:29:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1413 backedges. 561 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:29:06,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:29:07,112 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 [2022-07-12 18:29:07,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1413 backedges. 561 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:29:07,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74617175] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:29:07,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:29:07,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41, 41] total 83 [2022-07-12 18:29:07,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703638938] [2022-07-12 18:29:07,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:29:07,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-07-12 18:29:07,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:29:07,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-07-12 18:29:07,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=849, Invalid=6123, Unknown=0, NotChecked=0, Total=6972 [2022-07-12 18:29:07,180 INFO L87 Difference]: Start difference. First operand 292 states and 328 transitions. Second operand has 84 states, 83 states have (on average 4.216867469879518) internal successors, (350), 84 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:29:08,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:29:08,491 INFO L93 Difference]: Finished difference Result 316 states and 356 transitions. [2022-07-12 18:29:08,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-12 18:29:08,492 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 4.216867469879518) internal successors, (350), 84 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2022-07-12 18:29:08,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:29:08,493 INFO L225 Difference]: With dead ends: 316 [2022-07-12 18:29:08,493 INFO L226 Difference]: Without dead ends: 316 [2022-07-12 18:29:08,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 298 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2886 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1983, Invalid=8937, Unknown=0, NotChecked=0, Total=10920 [2022-07-12 18:29:08,494 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 1378 mSDsluCounter, 2270 mSDsCounter, 0 mSdLazyCounter, 3564 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1378 SdHoareTripleChecker+Valid, 2368 SdHoareTripleChecker+Invalid, 3706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 3564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 18:29:08,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1378 Valid, 2368 Invalid, 3706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 3564 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-12 18:29:08,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-07-12 18:29:08,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 304. [2022-07-12 18:29:08,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.1287128712871286) internal successors, (342), 303 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:29:08,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 342 transitions. [2022-07-12 18:29:08,497 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 342 transitions. Word has length 172 [2022-07-12 18:29:08,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:29:08,498 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 342 transitions. [2022-07-12 18:29:08,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 83 states have (on average 4.216867469879518) internal successors, (350), 84 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:29:08,498 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 342 transitions. [2022-07-12 18:29:08,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-07-12 18:29:08,499 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:29:08,499 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:29:08,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-12 18:29:08,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:29:08,717 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:29:08,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:29:08,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1157562195, now seen corresponding path program 33 times [2022-07-12 18:29:08,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:29:08,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108122002] [2022-07-12 18:29:08,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:29:08,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:29:08,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:29:09,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1504 backedges. 73 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:29:09,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:29:09,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108122002] [2022-07-12 18:29:09,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108122002] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:29:09,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7371709] [2022-07-12 18:29:09,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:29:09,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:29:09,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:29:09,322 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:29:09,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-12 18:29:10,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2022-07-12 18:29:10,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:29:10,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 136 conjunts are in the unsatisfiable core [2022-07-12 18:29:10,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:29:10,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:29:11,034 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-12 18:29:11,034 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 22 treesize of output 21 [2022-07-12 18:29:11,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1504 backedges. 73 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:29:11,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:29:11,330 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 13 [2022-07-12 18:29:11,332 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 26 treesize of output 22 [2022-07-12 18:29:11,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1504 backedges. 73 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:29:11,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7371709] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:29:11,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:29:11,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 72 [2022-07-12 18:29:11,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548875844] [2022-07-12 18:29:11,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:29:11,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-12 18:29:11,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:29:11,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-12 18:29:11,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=4926, Unknown=0, NotChecked=0, Total=5112 [2022-07-12 18:29:11,706 INFO L87 Difference]: Start difference. First operand 304 states and 342 transitions. Second operand has 72 states, 72 states have (on average 3.8333333333333335) internal successors, (276), 72 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:29:15,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:29:15,994 INFO L93 Difference]: Finished difference Result 628 states and 715 transitions. [2022-07-12 18:29:15,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-12 18:29:15,995 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.8333333333333335) internal successors, (276), 72 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2022-07-12 18:29:15,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:29:15,995 INFO L225 Difference]: With dead ends: 628 [2022-07-12 18:29:15,995 INFO L226 Difference]: Without dead ends: 311 [2022-07-12 18:29:15,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 317 SyntacticMatches, 10 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2552 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=799, Invalid=16231, Unknown=0, NotChecked=0, Total=17030 [2022-07-12 18:29:15,997 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 873 mSDsluCounter, 5083 mSDsCounter, 0 mSdLazyCounter, 7453 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 5178 SdHoareTripleChecker+Invalid, 7753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 7453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:29:15,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 5178 Invalid, 7753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 7453 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-12 18:29:15,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-07-12 18:29:15,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 308. [2022-07-12 18:29:15,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.1270358306188926) internal successors, (346), 307 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:29:15,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 346 transitions. [2022-07-12 18:29:16,000 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 346 transitions. Word has length 177 [2022-07-12 18:29:16,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:29:16,000 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 346 transitions. [2022-07-12 18:29:16,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.8333333333333335) internal successors, (276), 72 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:29:16,000 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 346 transitions. [2022-07-12 18:29:16,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-07-12 18:29:16,001 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:29:16,001 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:29:16,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-12 18:29:16,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-07-12 18:29:16,220 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:29:16,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:29:16,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1298066896, now seen corresponding path program 34 times [2022-07-12 18:29:16,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:29:16,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054881256] [2022-07-12 18:29:16,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:29:16,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:29:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:29:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 561 proven. 1016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:29:16,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:29:16,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054881256] [2022-07-12 18:29:16,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054881256] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:29:16,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165409884] [2022-07-12 18:29:16,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:29:16,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:29:16,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:29:16,962 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:29:16,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-12 18:29:17,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:29:17,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:29:17,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 114 conjunts are in the unsatisfiable core [2022-07-12 18:29:17,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:29:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 630 proven. 947 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:29:18,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:29:19,093 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 [2022-07-12 18:29:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 630 proven. 947 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:29:19,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165409884] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:29:19,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:29:19,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42, 42] total 104 [2022-07-12 18:29:19,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447824450] [2022-07-12 18:29:19,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:29:19,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-07-12 18:29:19,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:29:19,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-07-12 18:29:19,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1129, Invalid=9791, Unknown=0, NotChecked=0, Total=10920 [2022-07-12 18:29:19,853 INFO L87 Difference]: Start difference. First operand 308 states and 346 transitions. Second operand has 105 states, 104 states have (on average 4.288461538461538) internal successors, (446), 105 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:29:21,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:29:21,940 INFO L93 Difference]: Finished difference Result 332 states and 374 transitions. [2022-07-12 18:29:21,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-12 18:29:21,940 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 104 states have (on average 4.288461538461538) internal successors, (446), 105 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2022-07-12 18:29:21,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:29:21,941 INFO L225 Difference]: With dead ends: 332 [2022-07-12 18:29:21,941 INFO L226 Difference]: Without dead ends: 332 [2022-07-12 18:29:21,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3665 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3922, Invalid=16958, Unknown=0, NotChecked=0, Total=20880 [2022-07-12 18:29:21,942 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 2327 mSDsluCounter, 2497 mSDsCounter, 0 mSdLazyCounter, 3999 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2327 SdHoareTripleChecker+Valid, 2600 SdHoareTripleChecker+Invalid, 4278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 3999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 18:29:21,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2327 Valid, 2600 Invalid, 4278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 3999 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-12 18:29:21,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-07-12 18:29:21,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 320. [2022-07-12 18:29:21,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 1.128526645768025) internal successors, (360), 319 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:29:21,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 360 transitions. [2022-07-12 18:29:21,950 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 360 transitions. Word has length 181 [2022-07-12 18:29:21,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:29:21,950 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 360 transitions. [2022-07-12 18:29:21,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 104 states have (on average 4.288461538461538) internal successors, (446), 105 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:29:21,950 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 360 transitions. [2022-07-12 18:29:21,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-07-12 18:29:21,951 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:29:21,951 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:29:21,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-12 18:29:22,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:29:22,169 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:29:22,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:29:22,170 INFO L85 PathProgramCache]: Analyzing trace with hash -769830060, now seen corresponding path program 35 times [2022-07-12 18:29:22,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:29:22,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089824247] [2022-07-12 18:29:22,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:29:22,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:29:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:29:23,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1673 backedges. 77 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:29:23,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:29:23,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089824247] [2022-07-12 18:29:23,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089824247] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:29:23,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343323796] [2022-07-12 18:29:23,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:29:23,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:29:23,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:29:23,130 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:29:23,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-12 18:29:23,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2022-07-12 18:29:23,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:29:23,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 138 conjunts are in the unsatisfiable core [2022-07-12 18:29:23,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:29:24,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:29:24,282 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-12 18:29:24,282 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 22 treesize of output 21 [2022-07-12 18:29:24,366 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 [2022-07-12 18:29:24,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1673 backedges. 77 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:29:24,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:29:24,494 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 13 [2022-07-12 18:29:24,495 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 26 treesize of output 22 [2022-07-12 18:29:24,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1673 backedges. 77 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:29:24,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343323796] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:29:24,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:29:24,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 74 [2022-07-12 18:29:24,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102459649] [2022-07-12 18:29:24,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:29:24,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-07-12 18:29:24,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:29:24,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-07-12 18:29:24,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=5213, Unknown=0, NotChecked=0, Total=5402 [2022-07-12 18:29:24,846 INFO L87 Difference]: Start difference. First operand 320 states and 360 transitions. Second operand has 74 states, 74 states have (on average 3.8783783783783785) internal successors, (287), 74 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:29:28,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:29:28,005 INFO L93 Difference]: Finished difference Result 662 states and 754 transitions. [2022-07-12 18:29:28,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-07-12 18:29:28,005 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.8783783783783785) internal successors, (287), 74 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 186 [2022-07-12 18:29:28,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:29:28,006 INFO L225 Difference]: With dead ends: 662 [2022-07-12 18:29:28,006 INFO L226 Difference]: Without dead ends: 327 [2022-07-12 18:29:28,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 333 SyntacticMatches, 12 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2736 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=830, Invalid=17530, Unknown=0, NotChecked=0, Total=18360 [2022-07-12 18:29:28,008 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 709 mSDsluCounter, 5015 mSDsCounter, 0 mSdLazyCounter, 7208 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 5115 SdHoareTripleChecker+Invalid, 7582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 7208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:29:28,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 5115 Invalid, 7582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 7208 Invalid, 0 Unknown, 132 Unchecked, 1.6s Time] [2022-07-12 18:29:28,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-07-12 18:29:28,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 324. [2022-07-12 18:29:28,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.1269349845201238) internal successors, (364), 323 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:29:28,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 364 transitions. [2022-07-12 18:29:28,011 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 364 transitions. Word has length 186 [2022-07-12 18:29:28,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:29:28,011 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 364 transitions. [2022-07-12 18:29:28,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.8783783783783785) internal successors, (287), 74 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:29:28,011 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 364 transitions. [2022-07-12 18:29:28,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-07-12 18:29:28,012 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:29:28,012 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:29:28,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-07-12 18:29:28,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-07-12 18:29:28,228 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:29:28,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:29:28,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1474942697, now seen corresponding path program 36 times [2022-07-12 18:29:28,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:29:28,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178258486] [2022-07-12 18:29:28,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:29:28,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:29:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:29:28,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 630 proven. 1120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:29:28,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:29:28,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178258486] [2022-07-12 18:29:28,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178258486] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:29:28,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378157241] [2022-07-12 18:29:28,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:29:28,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:29:28,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:29:28,863 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:29:28,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-12 18:29:29,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-07-12 18:29:29,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:29:29,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 99 conjunts are in the unsatisfiable core [2022-07-12 18:29:29,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:29:29,832 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 [2022-07-12 18:29:31,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 703 proven. 1047 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:29:31,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:29:33,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 780 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:29:33,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378157241] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:29:33,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:29:33,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 130 [2022-07-12 18:29:33,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087859908] [2022-07-12 18:29:33,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:29:33,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-07-12 18:29:33,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:29:33,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-07-12 18:29:33,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2394, Invalid=14636, Unknown=0, NotChecked=0, Total=17030 [2022-07-12 18:29:33,328 INFO L87 Difference]: Start difference. First operand 324 states and 364 transitions. Second operand has 131 states, 130 states have (on average 4.338461538461538) internal successors, (564), 131 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:29:34,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:29:34,557 INFO L93 Difference]: Finished difference Result 348 states and 392 transitions. [2022-07-12 18:29:34,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 18:29:34,558 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 130 states have (on average 4.338461538461538) internal successors, (564), 131 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2022-07-12 18:29:34,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:29:34,558 INFO L225 Difference]: With dead ends: 348 [2022-07-12 18:29:34,559 INFO L226 Difference]: Without dead ends: 348 [2022-07-12 18:29:34,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7501 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4455, Invalid=19107, Unknown=0, NotChecked=0, Total=23562 [2022-07-12 18:29:34,560 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 1947 mSDsluCounter, 1696 mSDsCounter, 0 mSdLazyCounter, 2505 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1947 SdHoareTripleChecker+Valid, 1804 SdHoareTripleChecker+Invalid, 2731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 2505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:29:34,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1947 Valid, 1804 Invalid, 2731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 2505 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 18:29:34,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-07-12 18:29:34,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 336. [2022-07-12 18:29:34,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 1.128358208955224) internal successors, (378), 335 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:29:34,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 378 transitions. [2022-07-12 18:29:34,563 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 378 transitions. Word has length 190 [2022-07-12 18:29:34,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:29:34,563 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 378 transitions. [2022-07-12 18:29:34,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 130 states have (on average 4.338461538461538) internal successors, (564), 131 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:29:34,563 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 378 transitions. [2022-07-12 18:29:34,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-07-12 18:29:34,564 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:29:34,564 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:29:34,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-07-12 18:29:34,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:29:34,772 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:29:34,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:29:34,773 INFO L85 PathProgramCache]: Analyzing trace with hash 311784653, now seen corresponding path program 37 times [2022-07-12 18:29:34,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:29:34,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112045058] [2022-07-12 18:29:34,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:29:34,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:29:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:29:35,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 81 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:29:35,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:29:35,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112045058] [2022-07-12 18:29:35,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112045058] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:29:35,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141936494] [2022-07-12 18:29:35,616 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:29:35,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:29:35,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:29:35,617 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:29:35,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-12 18:29:35,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:29:35,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 146 conjunts are in the unsatisfiable core [2022-07-12 18:29:35,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:29:36,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:29:36,472 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-12 18:29:36,472 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 22 treesize of output 21 [2022-07-12 18:29:36,571 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 [2022-07-12 18:29:36,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 81 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:29:36,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:29:36,700 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 13 [2022-07-12 18:29:36,704 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 26 treesize of output 22 [2022-07-12 18:29:37,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 81 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:29:37,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141936494] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:29:37,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:29:37,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 77 [2022-07-12 18:29:37,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939174056] [2022-07-12 18:29:37,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:29:37,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-07-12 18:29:37,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:29:37,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-07-12 18:29:37,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=5656, Unknown=0, NotChecked=0, Total=5852 [2022-07-12 18:29:37,082 INFO L87 Difference]: Start difference. First operand 336 states and 378 transitions. Second operand has 77 states, 77 states have (on average 3.896103896103896) internal successors, (300), 77 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:29:40,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:29:40,696 INFO L93 Difference]: Finished difference Result 696 states and 793 transitions. [2022-07-12 18:29:40,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-07-12 18:29:40,696 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.896103896103896) internal successors, (300), 77 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2022-07-12 18:29:40,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:29:40,697 INFO L225 Difference]: With dead ends: 696 [2022-07-12 18:29:40,697 INFO L226 Difference]: Without dead ends: 343 [2022-07-12 18:29:40,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 349 SyntacticMatches, 13 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3000 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=867, Invalid=19155, Unknown=0, NotChecked=0, Total=20022 [2022-07-12 18:29:40,698 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 862 mSDsluCounter, 5459 mSDsCounter, 0 mSdLazyCounter, 7687 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 5564 SdHoareTripleChecker+Invalid, 8305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 7687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 306 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-12 18:29:40,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [862 Valid, 5564 Invalid, 8305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 7687 Invalid, 0 Unknown, 306 Unchecked, 1.8s Time] [2022-07-12 18:29:40,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-07-12 18:29:40,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 340. [2022-07-12 18:29:40,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.126843657817109) internal successors, (382), 339 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:29:40,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 382 transitions. [2022-07-12 18:29:40,713 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 382 transitions. Word has length 195 [2022-07-12 18:29:40,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:29:40,713 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 382 transitions. [2022-07-12 18:29:40,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.896103896103896) internal successors, (300), 77 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:29:40,713 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 382 transitions. [2022-07-12 18:29:40,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-07-12 18:29:40,714 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:29:40,714 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:29:40,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-07-12 18:29:40,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:29:40,926 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:29:40,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:29:40,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1565693334, now seen corresponding path program 38 times [2022-07-12 18:29:40,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:29:40,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684897870] [2022-07-12 18:29:40,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:29:40,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:29:40,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:29:41,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 703 proven. 1229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:29:41,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:29:41,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684897870] [2022-07-12 18:29:41,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684897870] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:29:41,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752399354] [2022-07-12 18:29:41,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:29:41,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:29:41,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:29:41,526 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:29:41,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-12 18:29:41,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:29:41,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:29:41,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 120 conjunts are in the unsatisfiable core [2022-07-12 18:29:41,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:29:42,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 780 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:29:42,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:29:43,413 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 [2022-07-12 18:29:43,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 780 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:29:43,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752399354] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:29:43,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:29:43,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 47, 47] total 94 [2022-07-12 18:29:43,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820415113] [2022-07-12 18:29:43,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:29:43,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-07-12 18:29:43,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:29:43,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-07-12 18:29:43,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=874, Invalid=8056, Unknown=0, NotChecked=0, Total=8930 [2022-07-12 18:29:43,483 INFO L87 Difference]: Start difference. First operand 340 states and 382 transitions. Second operand has 95 states, 94 states have (on average 4.297872340425532) internal successors, (404), 95 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:29:46,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:29:46,110 INFO L93 Difference]: Finished difference Result 364 states and 410 transitions. [2022-07-12 18:29:46,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-12 18:29:46,110 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 4.297872340425532) internal successors, (404), 95 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2022-07-12 18:29:46,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:29:46,111 INFO L225 Difference]: With dead ends: 364 [2022-07-12 18:29:46,111 INFO L226 Difference]: Without dead ends: 364 [2022-07-12 18:29:46,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 346 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3076 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3476, Invalid=15706, Unknown=0, NotChecked=0, Total=19182 [2022-07-12 18:29:46,112 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 2396 mSDsluCounter, 2942 mSDsCounter, 0 mSdLazyCounter, 4639 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2396 SdHoareTripleChecker+Valid, 3055 SdHoareTripleChecker+Invalid, 4900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 4639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:29:46,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2396 Valid, 3055 Invalid, 4900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 4639 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-12 18:29:46,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-07-12 18:29:46,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 352. [2022-07-12 18:29:46,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.1282051282051282) internal successors, (396), 351 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:29:46,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 396 transitions. [2022-07-12 18:29:46,115 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 396 transitions. Word has length 199 [2022-07-12 18:29:46,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:29:46,116 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 396 transitions. [2022-07-12 18:29:46,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 4.297872340425532) internal successors, (404), 95 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:29:46,116 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 396 transitions. [2022-07-12 18:29:46,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-07-12 18:29:46,117 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:29:46,117 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:29:46,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-07-12 18:29:46,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-07-12 18:29:46,334 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:29:46,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:29:46,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1761538214, now seen corresponding path program 39 times [2022-07-12 18:29:46,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:29:46,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144760481] [2022-07-12 18:29:46,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:29:46,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:29:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:29:47,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2038 backedges. 85 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:29:47,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:29:47,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144760481] [2022-07-12 18:29:47,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144760481] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:29:47,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428950706] [2022-07-12 18:29:47,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:29:47,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:29:47,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:29:47,342 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:29:47,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-12 18:29:48,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-07-12 18:29:48,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:29:48,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 152 conjunts are in the unsatisfiable core [2022-07-12 18:29:48,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:29:49,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:29:49,703 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-12 18:29:49,704 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 22 treesize of output 21 [2022-07-12 18:29:49,811 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 [2022-07-12 18:29:49,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2038 backedges. 85 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:29:49,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:29:49,943 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 13 [2022-07-12 18:29:49,944 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 26 treesize of output 22 [2022-07-12 18:29:50,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2038 backedges. 85 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:29:50,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428950706] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:29:50,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:29:50,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 80 [2022-07-12 18:29:50,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386262088] [2022-07-12 18:29:50,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:29:50,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-07-12 18:29:50,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:29:50,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-07-12 18:29:50,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=6117, Unknown=0, NotChecked=0, Total=6320 [2022-07-12 18:29:50,514 INFO L87 Difference]: Start difference. First operand 352 states and 396 transitions. Second operand has 80 states, 80 states have (on average 3.9125) internal successors, (313), 80 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:29:54,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:29:54,757 INFO L93 Difference]: Finished difference Result 730 states and 832 transitions. [2022-07-12 18:29:54,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-12 18:29:54,758 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.9125) internal successors, (313), 80 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2022-07-12 18:29:54,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:29:54,759 INFO L225 Difference]: With dead ends: 730 [2022-07-12 18:29:54,759 INFO L226 Difference]: Without dead ends: 359 [2022-07-12 18:29:54,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 366 SyntacticMatches, 13 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3247 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=904, Invalid=20852, Unknown=0, NotChecked=0, Total=21756 [2022-07-12 18:29:54,760 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 906 mSDsluCounter, 6564 mSDsCounter, 0 mSdLazyCounter, 9525 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 6674 SdHoareTripleChecker+Invalid, 9853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 9525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:29:54,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [906 Valid, 6674 Invalid, 9853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 9525 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-12 18:29:54,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-07-12 18:29:54,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 356. [2022-07-12 18:29:54,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.1267605633802817) internal successors, (400), 355 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:29:54,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 400 transitions. [2022-07-12 18:29:54,763 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 400 transitions. Word has length 204 [2022-07-12 18:29:54,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:29:54,763 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 400 transitions. [2022-07-12 18:29:54,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.9125) internal successors, (313), 80 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:29:54,763 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 400 transitions. [2022-07-12 18:29:54,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-07-12 18:29:54,764 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:29:54,764 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:29:54,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-07-12 18:29:54,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-07-12 18:29:54,987 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:29:54,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:29:54,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1259805277, now seen corresponding path program 40 times [2022-07-12 18:29:54,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:29:54,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249315360] [2022-07-12 18:29:54,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:29:54,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:29:55,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:29:56,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2123 backedges. 780 proven. 1343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:29:56,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:29:56,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249315360] [2022-07-12 18:29:56,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249315360] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:29:56,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469896733] [2022-07-12 18:29:56,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:29:56,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:29:56,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:29:56,018 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:29:56,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-12 18:29:56,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:29:56,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:29:56,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 125 conjunts are in the unsatisfiable core [2022-07-12 18:29:56,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:29:57,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2123 backedges. 861 proven. 1262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:29:57,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:29:58,023 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 [2022-07-12 18:29:58,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2123 backedges. 861 proven. 1262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:29:58,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469896733] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:29:58,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:29:58,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49, 49] total 99 [2022-07-12 18:29:58,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22157088] [2022-07-12 18:29:58,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:29:58,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-07-12 18:29:58,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:29:58,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-07-12 18:29:58,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=8695, Unknown=0, NotChecked=0, Total=9900 [2022-07-12 18:29:58,092 INFO L87 Difference]: Start difference. First operand 356 states and 400 transitions. Second operand has 100 states, 99 states have (on average 4.262626262626263) internal successors, (422), 100 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:29:59,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:29:59,650 INFO L93 Difference]: Finished difference Result 380 states and 428 transitions. [2022-07-12 18:29:59,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-12 18:29:59,651 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 99 states have (on average 4.262626262626263) internal successors, (422), 100 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2022-07-12 18:29:59,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:29:59,652 INFO L225 Difference]: With dead ends: 380 [2022-07-12 18:29:59,652 INFO L226 Difference]: Without dead ends: 380 [2022-07-12 18:29:59,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 362 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4142 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2805, Invalid=12695, Unknown=0, NotChecked=0, Total=15500 [2022-07-12 18:29:59,653 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 1901 mSDsluCounter, 3027 mSDsCounter, 0 mSdLazyCounter, 4685 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1901 SdHoareTripleChecker+Valid, 3145 SdHoareTripleChecker+Invalid, 4877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 4685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:29:59,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1901 Valid, 3145 Invalid, 4877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 4685 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-12 18:29:59,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-07-12 18:29:59,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 368. [2022-07-12 18:29:59,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.1280653950953679) internal successors, (414), 367 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:29:59,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 414 transitions. [2022-07-12 18:29:59,658 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 414 transitions. Word has length 208 [2022-07-12 18:29:59,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:29:59,658 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 414 transitions. [2022-07-12 18:29:59,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 99 states have (on average 4.262626262626263) internal successors, (422), 100 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:29:59,659 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 414 transitions. [2022-07-12 18:29:59,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-07-12 18:29:59,659 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:29:59,660 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:29:59,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-07-12 18:29:59,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-12 18:29:59,875 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:29:59,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:29:59,876 INFO L85 PathProgramCache]: Analyzing trace with hash 116809543, now seen corresponding path program 41 times [2022-07-12 18:29:59,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:29:59,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473754838] [2022-07-12 18:29:59,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:29:59,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:29:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2234 backedges. 89 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:01,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:01,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473754838] [2022-07-12 18:30:01,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473754838] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:30:01,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068233446] [2022-07-12 18:30:01,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:30:01,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:01,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:30:01,081 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:30:01,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-12 18:30:01,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-07-12 18:30:01,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:30:01,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 158 conjunts are in the unsatisfiable core [2022-07-12 18:30:01,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:30:02,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:30:02,744 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-12 18:30:02,744 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 22 treesize of output 21 [2022-07-12 18:30:02,865 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 [2022-07-12 18:30:02,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2234 backedges. 89 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:02,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:30:03,058 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 13 [2022-07-12 18:30:03,059 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 26 treesize of output 22 [2022-07-12 18:30:03,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2234 backedges. 89 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:03,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068233446] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:30:03,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:30:03,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 83 [2022-07-12 18:30:03,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471607522] [2022-07-12 18:30:03,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:30:03,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-07-12 18:30:03,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:03,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-07-12 18:30:03,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=6596, Unknown=0, NotChecked=0, Total=6806 [2022-07-12 18:30:03,590 INFO L87 Difference]: Start difference. First operand 368 states and 414 transitions. Second operand has 83 states, 83 states have (on average 3.927710843373494) internal successors, (326), 83 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:08,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:30:08,238 INFO L93 Difference]: Finished difference Result 764 states and 871 transitions. [2022-07-12 18:30:08,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-07-12 18:30:08,239 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.927710843373494) internal successors, (326), 83 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 213 [2022-07-12 18:30:08,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:30:08,240 INFO L225 Difference]: With dead ends: 764 [2022-07-12 18:30:08,240 INFO L226 Difference]: Without dead ends: 375 [2022-07-12 18:30:08,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 382 SyntacticMatches, 14 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3534 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=941, Invalid=22621, Unknown=0, NotChecked=0, Total=23562 [2022-07-12 18:30:08,242 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 1059 mSDsluCounter, 6893 mSDsCounter, 0 mSdLazyCounter, 10031 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1059 SdHoareTripleChecker+Valid, 7008 SdHoareTripleChecker+Invalid, 10398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 10031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:30:08,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1059 Valid, 7008 Invalid, 10398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 10031 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-12 18:30:08,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-07-12 18:30:08,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 372. [2022-07-12 18:30:08,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 1.1266846361185985) internal successors, (418), 371 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:08,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 418 transitions. [2022-07-12 18:30:08,257 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 418 transitions. Word has length 213 [2022-07-12 18:30:08,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:30:08,257 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 418 transitions. [2022-07-12 18:30:08,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.927710843373494) internal successors, (326), 83 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:08,257 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 418 transitions. [2022-07-12 18:30:08,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-07-12 18:30:08,259 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:08,259 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:30:08,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-07-12 18:30:08,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-07-12 18:30:08,464 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:30:08,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:08,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1873213532, now seen corresponding path program 42 times [2022-07-12 18:30:08,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:08,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22954554] [2022-07-12 18:30:08,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:08,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:09,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2323 backedges. 861 proven. 1462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:09,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:09,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22954554] [2022-07-12 18:30:09,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22954554] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:30:09,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040488523] [2022-07-12 18:30:09,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:30:09,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:09,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:30:09,275 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:30:09,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-07-12 18:30:13,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2022-07-12 18:30:13,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:30:13,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 108 conjunts are in the unsatisfiable core [2022-07-12 18:30:13,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:30:15,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2323 backedges. 946 proven. 1377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:15,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:30:16,967 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 7 treesize of output 5 [2022-07-12 18:30:17,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2323 backedges. 946 proven. 1377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:17,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040488523] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:30:17,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:30:17,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 51, 51] total 125 [2022-07-12 18:30:17,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780785914] [2022-07-12 18:30:17,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:30:17,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-07-12 18:30:17,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:17,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-07-12 18:30:17,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2171, Invalid=13579, Unknown=0, NotChecked=0, Total=15750 [2022-07-12 18:30:17,042 INFO L87 Difference]: Start difference. First operand 372 states and 418 transitions. Second operand has 126 states, 125 states have (on average 4.408) internal successors, (551), 126 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:19,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:30:19,717 INFO L93 Difference]: Finished difference Result 396 states and 446 transitions. [2022-07-12 18:30:19,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-12 18:30:19,717 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 125 states have (on average 4.408) internal successors, (551), 126 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 217 [2022-07-12 18:30:19,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:30:19,718 INFO L225 Difference]: With dead ends: 396 [2022-07-12 18:30:19,719 INFO L226 Difference]: Without dead ends: 396 [2022-07-12 18:30:19,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 356 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5871 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5591, Invalid=24511, Unknown=0, NotChecked=0, Total=30102 [2022-07-12 18:30:19,720 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 2565 mSDsluCounter, 1916 mSDsCounter, 0 mSdLazyCounter, 2845 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2565 SdHoareTripleChecker+Valid, 2039 SdHoareTripleChecker+Invalid, 3157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 2845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:30:19,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2565 Valid, 2039 Invalid, 3157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 2845 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-12 18:30:19,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-07-12 18:30:19,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 384. [2022-07-12 18:30:19,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 1.1279373368146215) internal successors, (432), 383 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:19,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 432 transitions. [2022-07-12 18:30:19,723 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 432 transitions. Word has length 217 [2022-07-12 18:30:19,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:30:19,723 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 432 transitions. [2022-07-12 18:30:19,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 125 states have (on average 4.408) internal successors, (551), 126 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:19,723 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 432 transitions. [2022-07-12 18:30:19,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-07-12 18:30:19,724 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:19,724 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:30:19,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-07-12 18:30:19,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:19,943 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:30:19,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:19,944 INFO L85 PathProgramCache]: Analyzing trace with hash -938957216, now seen corresponding path program 43 times [2022-07-12 18:30:19,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:19,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255659804] [2022-07-12 18:30:19,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:19,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:20,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:21,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2439 backedges. 93 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:21,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:21,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255659804] [2022-07-12 18:30:21,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255659804] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:30:21,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47425138] [2022-07-12 18:30:21,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:30:21,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:21,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:30:21,267 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:30:21,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-07-12 18:30:21,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:21,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 164 conjunts are in the unsatisfiable core [2022-07-12 18:30:21,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:30:22,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:30:22,311 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-12 18:30:22,311 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 22 treesize of output 21 [2022-07-12 18:30:22,407 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 [2022-07-12 18:30:22,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2439 backedges. 93 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:22,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:30:22,551 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 13 [2022-07-12 18:30:22,552 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 26 treesize of output 22 [2022-07-12 18:30:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2439 backedges. 93 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:23,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47425138] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:30:23,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:30:23,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 86 [2022-07-12 18:30:23,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696864230] [2022-07-12 18:30:23,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:30:23,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-07-12 18:30:23,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:23,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-07-12 18:30:23,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=7093, Unknown=0, NotChecked=0, Total=7310 [2022-07-12 18:30:23,022 INFO L87 Difference]: Start difference. First operand 384 states and 432 transitions. Second operand has 86 states, 86 states have (on average 3.941860465116279) internal successors, (339), 86 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:27,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:30:27,085 INFO L93 Difference]: Finished difference Result 669 states and 761 transitions. [2022-07-12 18:30:27,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-12 18:30:27,086 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.941860465116279) internal successors, (339), 86 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-07-12 18:30:27,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:30:27,087 INFO L225 Difference]: With dead ends: 669 [2022-07-12 18:30:27,087 INFO L226 Difference]: Without dead ends: 391 [2022-07-12 18:30:27,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 403 SyntacticMatches, 10 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2253 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=628, Invalid=18004, Unknown=0, NotChecked=0, Total=18632 [2022-07-12 18:30:27,088 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 684 mSDsluCounter, 6923 mSDsCounter, 0 mSdLazyCounter, 9708 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 7043 SdHoareTripleChecker+Invalid, 10268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 9708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 324 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:30:27,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 7043 Invalid, 10268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 9708 Invalid, 0 Unknown, 324 Unchecked, 2.3s Time] [2022-07-12 18:30:27,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-07-12 18:30:27,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 388. [2022-07-12 18:30:27,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 1.1266149870801034) internal successors, (436), 387 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:27,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 436 transitions. [2022-07-12 18:30:27,091 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 436 transitions. Word has length 222 [2022-07-12 18:30:27,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:30:27,091 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 436 transitions. [2022-07-12 18:30:27,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.941860465116279) internal successors, (339), 86 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:27,091 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 436 transitions. [2022-07-12 18:30:27,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-07-12 18:30:27,092 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:27,092 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:30:27,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-07-12 18:30:27,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:27,310 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:30:27,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:27,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1647241565, now seen corresponding path program 44 times [2022-07-12 18:30:27,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:27,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947012356] [2022-07-12 18:30:27,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:27,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:27,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:28,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2532 backedges. 946 proven. 1586 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:28,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:28,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947012356] [2022-07-12 18:30:28,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947012356] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:30:28,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268591218] [2022-07-12 18:30:28,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:30:28,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:28,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:30:28,044 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:30:28,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-07-12 18:30:28,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:30:28,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:30:28,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 135 conjunts are in the unsatisfiable core [2022-07-12 18:30:28,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:30:29,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2532 backedges. 1035 proven. 1497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:29,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:30:30,247 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 [2022-07-12 18:30:30,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2532 backedges. 1035 proven. 1497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:30,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268591218] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:30:30,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:30:30,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 53, 53] total 106 [2022-07-12 18:30:30,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285006594] [2022-07-12 18:30:30,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:30:30,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-07-12 18:30:30,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:30,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-07-12 18:30:30,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1102, Invalid=10240, Unknown=0, NotChecked=0, Total=11342 [2022-07-12 18:30:30,348 INFO L87 Difference]: Start difference. First operand 388 states and 436 transitions. Second operand has 107 states, 106 states have (on average 4.320754716981132) internal successors, (458), 107 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:34,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:30:34,184 INFO L93 Difference]: Finished difference Result 412 states and 464 transitions. [2022-07-12 18:30:34,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-12 18:30:34,184 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 106 states have (on average 4.320754716981132) internal successors, (458), 107 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 226 [2022-07-12 18:30:34,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:30:34,185 INFO L225 Difference]: With dead ends: 412 [2022-07-12 18:30:34,185 INFO L226 Difference]: Without dead ends: 412 [2022-07-12 18:30:34,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 394 SyntacticMatches, 2 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3946 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4433, Invalid=20059, Unknown=0, NotChecked=0, Total=24492 [2022-07-12 18:30:34,186 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 2669 mSDsluCounter, 3530 mSDsCounter, 0 mSdLazyCounter, 5456 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2669 SdHoareTripleChecker+Valid, 3658 SdHoareTripleChecker+Invalid, 5739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 5456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-12 18:30:34,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2669 Valid, 3658 Invalid, 5739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 5456 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-12 18:30:34,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-07-12 18:30:34,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 400. [2022-07-12 18:30:34,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.1278195488721805) internal successors, (450), 399 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:34,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 450 transitions. [2022-07-12 18:30:34,189 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 450 transitions. Word has length 226 [2022-07-12 18:30:34,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:30:34,189 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 450 transitions. [2022-07-12 18:30:34,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 106 states have (on average 4.320754716981132) internal successors, (458), 107 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:34,189 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 450 transitions. [2022-07-12 18:30:34,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-07-12 18:30:34,190 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:34,190 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:30:34,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-07-12 18:30:34,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:34,391 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:30:34,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:34,391 INFO L85 PathProgramCache]: Analyzing trace with hash -57860415, now seen corresponding path program 45 times [2022-07-12 18:30:34,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:34,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300711516] [2022-07-12 18:30:34,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:34,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:35,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2653 backedges. 97 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:35,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:35,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300711516] [2022-07-12 18:30:35,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300711516] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:30:35,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006326423] [2022-07-12 18:30:35,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:30:35,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:35,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:30:35,547 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:30:35,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-07-12 18:30:37,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-07-12 18:30:37,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:30:37,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 170 conjunts are in the unsatisfiable core [2022-07-12 18:30:37,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:30:38,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:30:38,925 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-12 18:30:38,925 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 22 treesize of output 21 [2022-07-12 18:30:39,028 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 [2022-07-12 18:30:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2653 backedges. 97 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:39,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:30:39,177 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 13 [2022-07-12 18:30:39,178 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 26 treesize of output 22 [2022-07-12 18:30:39,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2653 backedges. 97 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:39,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006326423] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:30:39,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:30:39,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 89 [2022-07-12 18:30:39,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132720251] [2022-07-12 18:30:39,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:30:39,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-07-12 18:30:39,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:39,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-07-12 18:30:39,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=7608, Unknown=0, NotChecked=0, Total=7832 [2022-07-12 18:30:39,815 INFO L87 Difference]: Start difference. First operand 400 states and 450 transitions. Second operand has 89 states, 89 states have (on average 3.955056179775281) internal successors, (352), 89 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:45,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:30:45,339 INFO L93 Difference]: Finished difference Result 697 states and 793 transitions. [2022-07-12 18:30:45,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-12 18:30:45,340 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.955056179775281) internal successors, (352), 89 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 231 [2022-07-12 18:30:45,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:30:45,341 INFO L225 Difference]: With dead ends: 697 [2022-07-12 18:30:45,341 INFO L226 Difference]: Without dead ends: 407 [2022-07-12 18:30:45,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 411 SyntacticMatches, 19 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2693 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=650, Invalid=19372, Unknown=0, NotChecked=0, Total=20022 [2022-07-12 18:30:45,342 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 862 mSDsluCounter, 7707 mSDsCounter, 0 mSdLazyCounter, 10833 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 7832 SdHoareTripleChecker+Invalid, 11423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 10833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:30:45,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [862 Valid, 7832 Invalid, 11423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 10833 Invalid, 0 Unknown, 295 Unchecked, 3.3s Time] [2022-07-12 18:30:45,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-07-12 18:30:45,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 404. [2022-07-12 18:30:45,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.1265508684863523) internal successors, (454), 403 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:45,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 454 transitions. [2022-07-12 18:30:45,344 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 454 transitions. Word has length 231 [2022-07-12 18:30:45,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:30:45,344 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 454 transitions. [2022-07-12 18:30:45,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.955056179775281) internal successors, (352), 89 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:45,345 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 454 transitions. [2022-07-12 18:30:45,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-07-12 18:30:45,345 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:45,345 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:30:45,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-07-12 18:30:45,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:45,555 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:30:45,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:45,556 INFO L85 PathProgramCache]: Analyzing trace with hash 947603934, now seen corresponding path program 46 times [2022-07-12 18:30:45,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:45,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526941282] [2022-07-12 18:30:45,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:45,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:45,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2750 backedges. 1035 proven. 1715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:46,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:46,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526941282] [2022-07-12 18:30:46,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526941282] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:30:46,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133974637] [2022-07-12 18:30:46,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:30:46,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:46,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:30:46,673 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:30:46,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-07-12 18:30:47,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:30:47,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:30:47,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 144 conjunts are in the unsatisfiable core [2022-07-12 18:30:47,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:30:48,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2750 backedges. 1128 proven. 1622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:48,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:30:49,966 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 [2022-07-12 18:30:51,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2750 backedges. 1128 proven. 1622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:51,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133974637] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:30:51,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:30:51,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 54, 54] total 134 [2022-07-12 18:30:51,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318603631] [2022-07-12 18:30:51,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:30:51,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-07-12 18:30:51,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:51,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-07-12 18:30:51,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1852, Invalid=16238, Unknown=0, NotChecked=0, Total=18090 [2022-07-12 18:30:51,310 INFO L87 Difference]: Start difference. First operand 404 states and 454 transitions. Second operand has 135 states, 134 states have (on average 4.313432835820896) internal successors, (578), 135 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:54,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:30:54,519 INFO L93 Difference]: Finished difference Result 428 states and 482 transitions. [2022-07-12 18:30:54,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-12 18:30:54,520 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 134 states have (on average 4.313432835820896) internal successors, (578), 135 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2022-07-12 18:30:54,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:30:54,524 INFO L225 Difference]: With dead ends: 428 [2022-07-12 18:30:54,524 INFO L226 Difference]: Without dead ends: 428 [2022-07-12 18:30:54,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 387 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6248 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=6496, Invalid=28286, Unknown=0, NotChecked=0, Total=34782 [2022-07-12 18:30:54,526 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 2457 mSDsluCounter, 3946 mSDsCounter, 0 mSdLazyCounter, 6247 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2457 SdHoareTripleChecker+Valid, 4079 SdHoareTripleChecker+Invalid, 6494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 6247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:30:54,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2457 Valid, 4079 Invalid, 6494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 6247 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-12 18:30:54,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-07-12 18:30:54,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 416. [2022-07-12 18:30:54,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.127710843373494) internal successors, (468), 415 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:54,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 468 transitions. [2022-07-12 18:30:54,529 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 468 transitions. Word has length 235 [2022-07-12 18:30:54,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:30:54,529 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 468 transitions. [2022-07-12 18:30:54,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 134 states have (on average 4.313432835820896) internal successors, (578), 135 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:30:54,530 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 468 transitions. [2022-07-12 18:30:54,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-07-12 18:30:54,530 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:54,530 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:30:54,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-07-12 18:30:54,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:54,749 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:30:54,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:54,749 INFO L85 PathProgramCache]: Analyzing trace with hash -403130266, now seen corresponding path program 47 times [2022-07-12 18:30:54,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:54,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930136958] [2022-07-12 18:30:54,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:54,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:54,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:56,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2876 backedges. 101 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:56,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:56,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930136958] [2022-07-12 18:30:56,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930136958] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:30:56,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112755255] [2022-07-12 18:30:56,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:30:56,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:56,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:30:56,169 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:30:56,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-07-12 18:30:57,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2022-07-12 18:30:57,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:30:57,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 176 conjunts are in the unsatisfiable core [2022-07-12 18:30:57,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:30:58,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:30:58,196 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-12 18:30:58,197 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 22 treesize of output 21 [2022-07-12 18:30:58,373 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 [2022-07-12 18:30:58,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2876 backedges. 101 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:58,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:30:58,637 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 13 [2022-07-12 18:30:58,638 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 26 treesize of output 22 [2022-07-12 18:30:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2876 backedges. 101 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:59,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112755255] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:30:59,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:30:59,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 92 [2022-07-12 18:30:59,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779064289] [2022-07-12 18:30:59,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:30:59,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-07-12 18:30:59,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:59,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-07-12 18:30:59,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=8141, Unknown=0, NotChecked=0, Total=8372 [2022-07-12 18:30:59,386 INFO L87 Difference]: Start difference. First operand 416 states and 468 transitions. Second operand has 92 states, 92 states have (on average 3.967391304347826) internal successors, (365), 92 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:06,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:31:06,203 INFO L93 Difference]: Finished difference Result 866 states and 988 transitions. [2022-07-12 18:31:06,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-07-12 18:31:06,204 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.967391304347826) internal successors, (365), 92 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 240 [2022-07-12 18:31:06,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:31:06,205 INFO L225 Difference]: With dead ends: 866 [2022-07-12 18:31:06,205 INFO L226 Difference]: Without dead ends: 423 [2022-07-12 18:31:06,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 433 SyntacticMatches, 14 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4368 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1052, Invalid=28360, Unknown=0, NotChecked=0, Total=29412 [2022-07-12 18:31:06,206 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 1350 mSDsluCounter, 8285 mSDsCounter, 0 mSdLazyCounter, 12010 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1350 SdHoareTripleChecker+Valid, 8415 SdHoareTripleChecker+Invalid, 12500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 12010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:31:06,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1350 Valid, 8415 Invalid, 12500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 12010 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-07-12 18:31:06,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-07-12 18:31:06,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 420. [2022-07-12 18:31:06,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 1.126491646778043) internal successors, (472), 419 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:06,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 472 transitions. [2022-07-12 18:31:06,209 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 472 transitions. Word has length 240 [2022-07-12 18:31:06,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:31:06,210 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 472 transitions. [2022-07-12 18:31:06,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.967391304347826) internal successors, (365), 92 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:06,210 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 472 transitions. [2022-07-12 18:31:06,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-07-12 18:31:06,211 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:31:06,211 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:31:06,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-07-12 18:31:06,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-07-12 18:31:06,431 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:31:06,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:31:06,431 INFO L85 PathProgramCache]: Analyzing trace with hash 974962153, now seen corresponding path program 48 times [2022-07-12 18:31:06,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:31:06,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922675331] [2022-07-12 18:31:06,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:31:06,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:31:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:31:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2977 backedges. 1128 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:31:07,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:31:07,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922675331] [2022-07-12 18:31:07,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922675331] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:31:07,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211976979] [2022-07-12 18:31:07,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:31:07,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:31:07,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:31:07,605 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:31:07,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-07-12 18:31:11,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-07-12 18:31:11,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:31:11,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 123 conjunts are in the unsatisfiable core [2022-07-12 18:31:11,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:31:11,771 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 [2022-07-12 18:31:15,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2977 backedges. 1225 proven. 1752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:31:15,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:31:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2977 backedges. 1326 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:31:19,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211976979] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:31:19,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:31:19,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 56, 56] total 165 [2022-07-12 18:31:19,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626385753] [2022-07-12 18:31:19,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:31:19,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 166 states [2022-07-12 18:31:19,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:31:19,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2022-07-12 18:31:19,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3501, Invalid=23889, Unknown=0, NotChecked=0, Total=27390 [2022-07-12 18:31:19,186 INFO L87 Difference]: Start difference. First operand 420 states and 472 transitions. Second operand has 166 states, 165 states have (on average 4.4) internal successors, (726), 166 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:22,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:31:22,388 INFO L93 Difference]: Finished difference Result 444 states and 500 transitions. [2022-07-12 18:31:22,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-12 18:31:22,389 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 165 states have (on average 4.4) internal successors, (726), 166 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 244 [2022-07-12 18:31:22,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:31:22,390 INFO L225 Difference]: With dead ends: 444 [2022-07-12 18:31:22,390 INFO L226 Difference]: Without dead ends: 444 [2022-07-12 18:31:22,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11179 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=8869, Invalid=39311, Unknown=0, NotChecked=0, Total=48180 [2022-07-12 18:31:22,392 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 2981 mSDsluCounter, 2730 mSDsCounter, 0 mSdLazyCounter, 3954 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2981 SdHoareTripleChecker+Valid, 2868 SdHoareTripleChecker+Invalid, 4272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 3954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:31:22,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2981 Valid, 2868 Invalid, 4272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 3954 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-12 18:31:22,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-07-12 18:31:22,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 432. [2022-07-12 18:31:22,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 1.1276102088167053) internal successors, (486), 431 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:22,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 486 transitions. [2022-07-12 18:31:22,395 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 486 transitions. Word has length 244 [2022-07-12 18:31:22,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:31:22,396 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 486 transitions. [2022-07-12 18:31:22,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 166 states, 165 states have (on average 4.4) internal successors, (726), 166 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:22,396 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 486 transitions. [2022-07-12 18:31:22,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-07-12 18:31:22,397 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:31:22,397 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:31:22,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-07-12 18:31:22,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-07-12 18:31:22,617 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:31:22,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:31:22,618 INFO L85 PathProgramCache]: Analyzing trace with hash -941288645, now seen corresponding path program 49 times [2022-07-12 18:31:22,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:31:22,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569429205] [2022-07-12 18:31:22,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:31:22,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:31:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:31:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3108 backedges. 105 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:31:24,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:31:24,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569429205] [2022-07-12 18:31:24,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569429205] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:31:24,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101365006] [2022-07-12 18:31:24,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:31:24,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:31:24,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:31:24,105 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:31:24,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-07-12 18:31:24,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:31:24,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 928 conjuncts, 182 conjunts are in the unsatisfiable core [2022-07-12 18:31:24,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:31:25,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:31:25,933 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-12 18:31:25,933 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 22 treesize of output 21 [2022-07-12 18:31:26,122 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 [2022-07-12 18:31:26,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3108 backedges. 105 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:31:26,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:31:26,379 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 13 [2022-07-12 18:31:26,381 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 26 treesize of output 22 [2022-07-12 18:31:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3108 backedges. 105 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:31:27,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101365006] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:31:27,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:31:27,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 95 [2022-07-12 18:31:27,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046494248] [2022-07-12 18:31:27,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:31:27,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-07-12 18:31:27,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:31:27,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-07-12 18:31:27,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=8692, Unknown=0, NotChecked=0, Total=8930 [2022-07-12 18:31:27,088 INFO L87 Difference]: Start difference. First operand 432 states and 486 transitions. Second operand has 95 states, 95 states have (on average 3.9789473684210526) internal successors, (378), 95 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:32,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:31:32,950 INFO L93 Difference]: Finished difference Result 900 states and 1027 transitions. [2022-07-12 18:31:32,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-07-12 18:31:32,950 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.9789473684210526) internal successors, (378), 95 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 249 [2022-07-12 18:31:32,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:31:32,951 INFO L225 Difference]: With dead ends: 900 [2022-07-12 18:31:32,951 INFO L226 Difference]: Without dead ends: 439 [2022-07-12 18:31:32,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 451 SyntacticMatches, 13 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4632 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1089, Invalid=30417, Unknown=0, NotChecked=0, Total=31506 [2022-07-12 18:31:32,953 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 1531 mSDsluCounter, 9255 mSDsCounter, 0 mSdLazyCounter, 13362 mSolverCounterSat, 536 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1531 SdHoareTripleChecker+Valid, 9390 SdHoareTripleChecker+Invalid, 13898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 536 IncrementalHoareTripleChecker+Valid, 13362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:31:32,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1531 Valid, 9390 Invalid, 13898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [536 Valid, 13362 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-12 18:31:32,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-07-12 18:31:32,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 436. [2022-07-12 18:31:32,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.1264367816091954) internal successors, (490), 435 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:32,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 490 transitions. [2022-07-12 18:31:32,956 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 490 transitions. Word has length 249 [2022-07-12 18:31:32,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:31:32,957 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 490 transitions. [2022-07-12 18:31:32,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.9789473684210526) internal successors, (378), 95 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:32,957 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 490 transitions. [2022-07-12 18:31:32,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-07-12 18:31:32,958 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:31:32,958 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:31:32,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-07-12 18:31:33,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-07-12 18:31:33,172 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:31:33,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:31:33,172 INFO L85 PathProgramCache]: Analyzing trace with hash 252416280, now seen corresponding path program 50 times [2022-07-12 18:31:33,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:31:33,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155139343] [2022-07-12 18:31:33,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:31:33,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:31:33,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:31:34,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3213 backedges. 1225 proven. 1988 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:31:34,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:31:34,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155139343] [2022-07-12 18:31:34,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155139343] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:31:34,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352555954] [2022-07-12 18:31:34,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:31:34,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:31:34,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:31:34,100 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:31:34,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-07-12 18:31:34,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:31:34,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:31:34,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 942 conjuncts, 153 conjunts are in the unsatisfiable core [2022-07-12 18:31:34,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:31:34,340 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 [2022-07-12 18:31:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3213 backedges. 1326 proven. 1887 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:31:36,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:31:40,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3213 backedges. 1431 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:31:40,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352555954] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:31:40,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:31:40,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 58, 58] total 170 [2022-07-12 18:31:40,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195664601] [2022-07-12 18:31:40,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:31:40,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2022-07-12 18:31:40,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:31:40,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2022-07-12 18:31:40,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3022, Invalid=26048, Unknown=0, NotChecked=0, Total=29070 [2022-07-12 18:31:40,571 INFO L87 Difference]: Start difference. First operand 436 states and 490 transitions. Second operand has 171 states, 170 states have (on average 4.4) internal successors, (748), 171 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:44,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:31:44,641 INFO L93 Difference]: Finished difference Result 460 states and 518 transitions. [2022-07-12 18:31:44,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-12 18:31:44,641 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 170 states have (on average 4.4) internal successors, (748), 171 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2022-07-12 18:31:44,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:31:44,642 INFO L225 Difference]: With dead ends: 460 [2022-07-12 18:31:44,643 INFO L226 Difference]: Without dead ends: 460 [2022-07-12 18:31:44,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 391 SyntacticMatches, 1 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12714 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=8355, Invalid=42947, Unknown=0, NotChecked=0, Total=51302 [2022-07-12 18:31:44,645 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 2262 mSDsluCounter, 5851 mSDsCounter, 0 mSdLazyCounter, 8481 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2262 SdHoareTripleChecker+Valid, 5994 SdHoareTripleChecker+Invalid, 8747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 8481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-12 18:31:44,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2262 Valid, 5994 Invalid, 8747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 8481 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-12 18:31:44,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-07-12 18:31:44,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 448. [2022-07-12 18:31:44,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 1.1275167785234899) internal successors, (504), 447 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:44,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 504 transitions. [2022-07-12 18:31:44,648 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 504 transitions. Word has length 253 [2022-07-12 18:31:44,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:31:44,649 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 504 transitions. [2022-07-12 18:31:44,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 170 states have (on average 4.4) internal successors, (748), 171 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:31:44,649 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 504 transitions. [2022-07-12 18:31:44,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-07-12 18:31:44,650 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:31:44,650 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:31:44,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-07-12 18:31:44,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:31:44,868 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-12 18:31:44,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:31:44,868 INFO L85 PathProgramCache]: Analyzing trace with hash 913696108, now seen corresponding path program 51 times [2022-07-12 18:31:44,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:31:44,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326095749] [2022-07-12 18:31:44,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:31:44,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:31:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:31:46,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3349 backedges. 109 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:31:46,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:31:46,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326095749] [2022-07-12 18:31:46,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326095749] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:31:46,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756701935] [2022-07-12 18:31:46,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:31:46,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:31:46,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:31:46,273 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:31:46,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-07-12 18:31:48,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2022-07-12 18:31:48,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:31:48,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 188 conjunts are in the unsatisfiable core [2022-07-12 18:31:48,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:31:50,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-12 18:31:50,421 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-12 18:31:50,421 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 22 treesize of output 21 [2022-07-12 18:31:50,590 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 [2022-07-12 18:31:50,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3349 backedges. 109 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:31:50,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:31:50,839 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 13 [2022-07-12 18:31:50,841 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 26 treesize of output 22 [2022-07-12 18:31:51,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3349 backedges. 109 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:31:51,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756701935] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:31:51,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:31:51,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 98 [2022-07-12 18:31:51,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35897295] [2022-07-12 18:31:51,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:31:51,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-07-12 18:31:51,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:31:51,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-07-12 18:31:51,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=9261, Unknown=0, NotChecked=0, Total=9506 [2022-07-12 18:31:51,620 INFO L87 Difference]: Start difference. First operand 448 states and 504 transitions. Second operand has 98 states, 98 states have (on average 3.989795918367347) internal successors, (391), 98 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)