./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/heap-manipulation/merge_sort-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version eb692b52 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/heap-manipulation/merge_sort-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 e47f94c757882803b8e19e21a897c3f5ab1653c3391e3b246153a1c416bdab7c --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 06:02:55,464 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 06:02:55,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 06:02:55,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 06:02:55,503 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 06:02:55,504 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 06:02:55,508 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 06:02:55,511 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 06:02:55,513 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 06:02:55,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 06:02:55,518 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 06:02:55,520 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 06:02:55,521 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 06:02:55,522 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 06:02:55,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 06:02:55,523 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 06:02:55,523 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 06:02:55,524 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 06:02:55,525 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 06:02:55,526 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 06:02:55,527 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 06:02:55,527 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 06:02:55,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 06:02:55,529 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 06:02:55,529 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 06:02:55,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 06:02:55,534 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 06:02:55,534 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 06:02:55,535 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 06:02:55,536 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 06:02:55,536 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 06:02:55,537 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 06:02:55,537 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 06:02:55,538 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 06:02:55,539 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 06:02:55,539 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 06:02:55,539 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 06:02:55,540 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 06:02:55,540 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 06:02:55,540 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 06:02:55,541 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 06:02:55,541 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 06:02:55,543 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-20 06:02:55,561 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 06:02:55,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 06:02:55,561 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 06:02:55,562 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 06:02:55,562 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 06:02:55,562 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 06:02:55,563 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 06:02:55,563 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 06:02:55,563 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 06:02:55,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 06:02:55,564 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 06:02:55,564 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 06:02:55,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 06:02:55,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 06:02:55,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 06:02:55,565 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 06:02:55,565 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 06:02:55,565 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 06:02:55,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 06:02:55,566 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 06:02:55,566 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 06:02:55,566 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 06:02:55,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 06:02:55,567 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 06:02:55,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 06:02:55,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 06:02:55,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 06:02:55,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 06:02:55,567 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 06:02:55,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 06:02:55,568 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e47f94c757882803b8e19e21a897c3f5ab1653c3391e3b246153a1c416bdab7c [2022-07-20 06:02:55,762 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 06:02:55,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 06:02:55,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 06:02:55,785 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 06:02:55,786 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 06:02:55,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2022-07-20 06:02:55,837 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92579500a/9cad7b527a744941b51456c3aaa8c195/FLAG678daa8eb [2022-07-20 06:02:56,276 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 06:02:56,276 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2022-07-20 06:02:56,285 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92579500a/9cad7b527a744941b51456c3aaa8c195/FLAG678daa8eb [2022-07-20 06:02:56,637 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92579500a/9cad7b527a744941b51456c3aaa8c195 [2022-07-20 06:02:56,639 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 06:02:56,640 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 06:02:56,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 06:02:56,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 06:02:56,644 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 06:02:56,644 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:02:56" (1/1) ... [2022-07-20 06:02:56,645 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a1ec80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:02:56, skipping insertion in model container [2022-07-20 06:02:56,645 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:02:56" (1/1) ... [2022-07-20 06:02:56,649 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 06:02:56,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 06:02:56,966 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/merge_sort-2.i[22632,22645] [2022-07-20 06:02:57,009 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 06:02:57,017 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 06:02:57,051 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/merge_sort-2.i[22632,22645] [2022-07-20 06:02:57,068 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 06:02:57,091 INFO L208 MainTranslator]: Completed translation [2022-07-20 06:02:57,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:02:57 WrapperNode [2022-07-20 06:02:57,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 06:02:57,095 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 06:02:57,095 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 06:02:57,095 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 06:02:57,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:02:57" (1/1) ... [2022-07-20 06:02:57,127 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:02:57" (1/1) ... [2022-07-20 06:02:57,157 INFO L137 Inliner]: procedures = 125, calls = 83, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 294 [2022-07-20 06:02:57,157 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 06:02:57,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 06:02:57,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 06:02:57,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 06:02:57,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:02:57" (1/1) ... [2022-07-20 06:02:57,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:02:57" (1/1) ... [2022-07-20 06:02:57,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:02:57" (1/1) ... [2022-07-20 06:02:57,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:02:57" (1/1) ... [2022-07-20 06:02:57,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:02:57" (1/1) ... [2022-07-20 06:02:57,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:02:57" (1/1) ... [2022-07-20 06:02:57,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:02:57" (1/1) ... [2022-07-20 06:02:57,214 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 06:02:57,218 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 06:02:57,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 06:02:57,219 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 06:02:57,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:02:57" (1/1) ... [2022-07-20 06:02:57,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 06:02:57,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:02:57,244 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) [2022-07-20 06:02:57,253 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 [2022-07-20 06:02:57,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 06:02:57,276 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2022-07-20 06:02:57,276 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2022-07-20 06:02:57,277 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2022-07-20 06:02:57,277 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2022-07-20 06:02:57,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 06:02:57,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 06:02:57,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 06:02:57,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 06:02:57,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-20 06:02:57,277 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-20 06:02:57,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 06:02:57,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 06:02:57,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 06:02:57,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 06:02:57,356 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 06:02:57,358 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 06:02:57,882 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 06:02:57,887 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 06:02:57,888 INFO L299 CfgBuilder]: Removed 33 assume(true) statements. [2022-07-20 06:02:57,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:02:57 BoogieIcfgContainer [2022-07-20 06:02:57,889 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 06:02:57,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 06:02:57,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 06:02:57,907 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 06:02:57,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:02:56" (1/3) ... [2022-07-20 06:02:57,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a02bf22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:02:57, skipping insertion in model container [2022-07-20 06:02:57,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:02:57" (2/3) ... [2022-07-20 06:02:57,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a02bf22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:02:57, skipping insertion in model container [2022-07-20 06:02:57,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:02:57" (3/3) ... [2022-07-20 06:02:57,909 INFO L111 eAbstractionObserver]: Analyzing ICFG merge_sort-2.i [2022-07-20 06:02:57,919 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 06:02:57,919 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 105 error locations. [2022-07-20 06:02:57,952 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 06:02:57,966 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@15a89c58, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4ecba7b4 [2022-07-20 06:02:57,967 INFO L358 AbstractCegarLoop]: Starting to check reachability of 105 error locations. [2022-07-20 06:02:57,977 INFO L276 IsEmpty]: Start isEmpty. Operand has 262 states, 139 states have (on average 2.194244604316547) internal successors, (305), 259 states have internal predecessors, (305), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-20 06:02:57,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-20 06:02:57,983 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:02:57,984 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-20 06:02:57,985 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr89ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:02:57,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:02:57,993 INFO L85 PathProgramCache]: Analyzing trace with hash 56404890, now seen corresponding path program 1 times [2022-07-20 06:02:58,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:02:58,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690329089] [2022-07-20 06:02:58,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:02:58,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:02:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:02:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:02:58,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:02:58,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690329089] [2022-07-20 06:02:58,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690329089] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:02:58,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:02:58,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:02:58,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871068236] [2022-07-20 06:02:58,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:02:58,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 06:02:58,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:02:58,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 06:02:58,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 06:02:58,128 INFO L87 Difference]: Start difference. First operand has 262 states, 139 states have (on average 2.194244604316547) internal successors, (305), 259 states have internal predecessors, (305), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:02:58,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:02:58,171 INFO L93 Difference]: Finished difference Result 260 states and 285 transitions. [2022-07-20 06:02:58,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 06:02:58,173 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-07-20 06:02:58,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:02:58,187 INFO L225 Difference]: With dead ends: 260 [2022-07-20 06:02:58,187 INFO L226 Difference]: Without dead ends: 258 [2022-07-20 06:02:58,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 06:02:58,191 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:02:58,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:02:58,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-07-20 06:02:58,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2022-07-20 06:02:58,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 137 states have (on average 1.9416058394160585) internal successors, (266), 255 states have internal predecessors, (266), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:02:58,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 283 transitions. [2022-07-20 06:02:58,256 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 283 transitions. Word has length 5 [2022-07-20 06:02:58,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:02:58,256 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 283 transitions. [2022-07-20 06:02:58,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:02:58,256 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 283 transitions. [2022-07-20 06:02:58,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-20 06:02:58,257 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:02:58,257 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-20 06:02:58,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 06:02:58,257 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr89ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:02:58,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:02:58,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1747491005, now seen corresponding path program 1 times [2022-07-20 06:02:58,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:02:58,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457461353] [2022-07-20 06:02:58,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:02:58,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:02:58,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:02:58,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:02:58,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:02:58,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457461353] [2022-07-20 06:02:58,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457461353] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:02:58,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:02:58,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:02:58,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777348172] [2022-07-20 06:02:58,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:02:58,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:02:58,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:02:58,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:02:58,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:02:58,305 INFO L87 Difference]: Start difference. First operand 258 states and 283 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) [2022-07-20 06:02:58,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:02:58,487 INFO L93 Difference]: Finished difference Result 391 states and 435 transitions. [2022-07-20 06:02:58,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:02:58,487 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 [2022-07-20 06:02:58,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:02:58,489 INFO L225 Difference]: With dead ends: 391 [2022-07-20 06:02:58,489 INFO L226 Difference]: Without dead ends: 390 [2022-07-20 06:02:58,492 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 [2022-07-20 06:02:58,494 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 133 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:02:58,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 396 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:02:58,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-07-20 06:02:58,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 261. [2022-07-20 06:02:58,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 140 states have (on average 1.9285714285714286) internal successors, (270), 258 states have internal predecessors, (270), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:02:58,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 287 transitions. [2022-07-20 06:02:58,509 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 287 transitions. Word has length 6 [2022-07-20 06:02:58,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:02:58,509 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 287 transitions. [2022-07-20 06:02:58,510 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) [2022-07-20 06:02:58,510 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 287 transitions. [2022-07-20 06:02:58,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-20 06:02:58,511 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:02:58,511 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-20 06:02:58,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 06:02:58,515 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:02:58,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:02:58,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1747491563, now seen corresponding path program 1 times [2022-07-20 06:02:58,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:02:58,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027675338] [2022-07-20 06:02:58,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:02:58,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:02:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:02:58,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:02:58,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:02:58,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027675338] [2022-07-20 06:02:58,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027675338] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:02:58,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:02:58,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:02:58,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082893559] [2022-07-20 06:02:58,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:02:58,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:02:58,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:02:58,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:02:58,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:02:58,567 INFO L87 Difference]: Start difference. First operand 261 states and 287 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) [2022-07-20 06:02:58,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:02:58,751 INFO L93 Difference]: Finished difference Result 439 states and 489 transitions. [2022-07-20 06:02:58,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:02:58,752 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 [2022-07-20 06:02:58,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:02:58,753 INFO L225 Difference]: With dead ends: 439 [2022-07-20 06:02:58,753 INFO L226 Difference]: Without dead ends: 439 [2022-07-20 06:02:58,754 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 [2022-07-20 06:02:58,754 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 199 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:02:58,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 569 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:02:58,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-07-20 06:02:58,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 259. [2022-07-20 06:02:58,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 140 states have (on average 1.9142857142857144) internal successors, (268), 256 states have internal predecessors, (268), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:02:58,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 285 transitions. [2022-07-20 06:02:58,761 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 285 transitions. Word has length 6 [2022-07-20 06:02:58,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:02:58,762 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 285 transitions. [2022-07-20 06:02:58,762 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) [2022-07-20 06:02:58,762 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 285 transitions. [2022-07-20 06:02:58,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-20 06:02:58,762 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:02:58,762 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-20 06:02:58,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 06:02:58,763 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:02:58,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:02:58,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1747491564, now seen corresponding path program 1 times [2022-07-20 06:02:58,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:02:58,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023753649] [2022-07-20 06:02:58,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:02:58,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:02:58,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:02:58,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:02:58,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:02:58,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023753649] [2022-07-20 06:02:58,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023753649] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:02:58,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:02:58,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:02:58,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640749483] [2022-07-20 06:02:58,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:02:58,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:02:58,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:02:58,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:02:58,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:02:58,792 INFO L87 Difference]: Start difference. First operand 259 states and 285 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) [2022-07-20 06:02:58,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:02:58,934 INFO L93 Difference]: Finished difference Result 400 states and 444 transitions. [2022-07-20 06:02:58,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:02:58,935 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 [2022-07-20 06:02:58,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:02:58,936 INFO L225 Difference]: With dead ends: 400 [2022-07-20 06:02:58,936 INFO L226 Difference]: Without dead ends: 400 [2022-07-20 06:02:58,936 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 [2022-07-20 06:02:58,942 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 162 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:02:58,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 560 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:02:58,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-07-20 06:02:58,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 257. [2022-07-20 06:02:58,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 140 states have (on average 1.9) internal successors, (266), 254 states have internal predecessors, (266), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:02:58,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 283 transitions. [2022-07-20 06:02:58,949 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 283 transitions. Word has length 6 [2022-07-20 06:02:58,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:02:58,949 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 283 transitions. [2022-07-20 06:02:58,950 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) [2022-07-20 06:02:58,950 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 283 transitions. [2022-07-20 06:02:58,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-20 06:02:58,950 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:02:58,950 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:02:58,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 06:02:58,951 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:02:58,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:02:58,951 INFO L85 PathProgramCache]: Analyzing trace with hash 6274696, now seen corresponding path program 1 times [2022-07-20 06:02:58,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:02:58,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387715466] [2022-07-20 06:02:58,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:02:58,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:02:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:02:58,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:02:58,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:02:58,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387715466] [2022-07-20 06:02:58,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387715466] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:02:58,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:02:58,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 06:02:58,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554280559] [2022-07-20 06:02:58,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:02:58,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:02:58,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:02:58,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:02:58,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:02:58,975 INFO L87 Difference]: Start difference. First operand 257 states and 283 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:02:58,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:02:58,999 INFO L93 Difference]: Finished difference Result 272 states and 296 transitions. [2022-07-20 06:02:58,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:02:58,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-20 06:02:58,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:02:59,000 INFO L225 Difference]: With dead ends: 272 [2022-07-20 06:02:59,000 INFO L226 Difference]: Without dead ends: 271 [2022-07-20 06:02:59,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:02:59,002 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 14 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:02:59,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 537 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:02:59,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-07-20 06:02:59,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 256. [2022-07-20 06:02:59,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 139 states have (on average 1.8992805755395683) internal successors, (264), 253 states have internal predecessors, (264), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:02:59,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 281 transitions. [2022-07-20 06:02:59,009 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 281 transitions. Word has length 8 [2022-07-20 06:02:59,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:02:59,009 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 281 transitions. [2022-07-20 06:02:59,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:02:59,010 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 281 transitions. [2022-07-20 06:02:59,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 06:02:59,010 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:02:59,010 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:02:59,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 06:02:59,010 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:02:59,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:02:59,011 INFO L85 PathProgramCache]: Analyzing trace with hash -849555632, now seen corresponding path program 1 times [2022-07-20 06:02:59,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:02:59,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60954240] [2022-07-20 06:02:59,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:02:59,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:02:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:02:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:02:59,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:02:59,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60954240] [2022-07-20 06:02:59,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60954240] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:02:59,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:02:59,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:02:59,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335689032] [2022-07-20 06:02:59,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:02:59,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:02:59,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:02:59,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:02:59,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:02:59,073 INFO L87 Difference]: Start difference. First operand 256 states and 281 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:02:59,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:02:59,224 INFO L93 Difference]: Finished difference Result 342 states and 375 transitions. [2022-07-20 06:02:59,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:02:59,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-07-20 06:02:59,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:02:59,226 INFO L225 Difference]: With dead ends: 342 [2022-07-20 06:02:59,226 INFO L226 Difference]: Without dead ends: 342 [2022-07-20 06:02:59,226 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 [2022-07-20 06:02:59,227 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 160 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:02:59,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 346 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:02:59,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-07-20 06:02:59,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 254. [2022-07-20 06:02:59,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 139 states have (on average 1.8848920863309353) internal successors, (262), 251 states have internal predecessors, (262), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:02:59,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 279 transitions. [2022-07-20 06:02:59,231 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 279 transitions. Word has length 11 [2022-07-20 06:02:59,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:02:59,232 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 279 transitions. [2022-07-20 06:02:59,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:02:59,232 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 279 transitions. [2022-07-20 06:02:59,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 06:02:59,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:02:59,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:02:59,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 06:02:59,233 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:02:59,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:02:59,233 INFO L85 PathProgramCache]: Analyzing trace with hash -849555633, now seen corresponding path program 1 times [2022-07-20 06:02:59,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:02:59,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703217253] [2022-07-20 06:02:59,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:02:59,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:02:59,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:02:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:02:59,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:02:59,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703217253] [2022-07-20 06:02:59,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703217253] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:02:59,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:02:59,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:02:59,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593404535] [2022-07-20 06:02:59,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:02:59,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:02:59,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:02:59,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:02:59,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:02:59,259 INFO L87 Difference]: Start difference. First operand 254 states and 279 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:02:59,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:02:59,420 INFO L93 Difference]: Finished difference Result 377 states and 416 transitions. [2022-07-20 06:02:59,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:02:59,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-07-20 06:02:59,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:02:59,421 INFO L225 Difference]: With dead ends: 377 [2022-07-20 06:02:59,422 INFO L226 Difference]: Without dead ends: 377 [2022-07-20 06:02:59,422 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 [2022-07-20 06:02:59,422 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 193 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:02:59,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 312 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:02:59,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-07-20 06:02:59,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 252. [2022-07-20 06:02:59,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 139 states have (on average 1.870503597122302) internal successors, (260), 249 states have internal predecessors, (260), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:02:59,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 277 transitions. [2022-07-20 06:02:59,427 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 277 transitions. Word has length 11 [2022-07-20 06:02:59,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:02:59,427 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 277 transitions. [2022-07-20 06:02:59,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:02:59,428 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 277 transitions. [2022-07-20 06:02:59,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 06:02:59,428 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:02:59,428 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:02:59,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 06:02:59,428 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr89ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:02:59,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:02:59,429 INFO L85 PathProgramCache]: Analyzing trace with hash 321246795, now seen corresponding path program 1 times [2022-07-20 06:02:59,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:02:59,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029402916] [2022-07-20 06:02:59,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:02:59,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:02:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:02:59,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:02:59,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:02:59,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029402916] [2022-07-20 06:02:59,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029402916] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:02:59,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:02:59,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 06:02:59,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260814695] [2022-07-20 06:02:59,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:02:59,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 06:02:59,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:02:59,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 06:02:59,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 06:02:59,463 INFO L87 Difference]: Start difference. First operand 252 states and 277 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:02:59,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:02:59,515 INFO L93 Difference]: Finished difference Result 407 states and 447 transitions. [2022-07-20 06:02:59,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 06:02:59,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 [2022-07-20 06:02:59,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:02:59,517 INFO L225 Difference]: With dead ends: 407 [2022-07-20 06:02:59,517 INFO L226 Difference]: Without dead ends: 407 [2022-07-20 06:02:59,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:02:59,518 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 602 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:02:59,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 508 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:02:59,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-07-20 06:02:59,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 252. [2022-07-20 06:02:59,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 139 states have (on average 1.8633093525179856) internal successors, (259), 249 states have internal predecessors, (259), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:02:59,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 276 transitions. [2022-07-20 06:02:59,523 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 276 transitions. Word has length 17 [2022-07-20 06:02:59,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:02:59,523 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 276 transitions. [2022-07-20 06:02:59,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:02:59,523 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 276 transitions. [2022-07-20 06:02:59,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-20 06:02:59,524 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:02:59,524 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:02:59,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-20 06:02:59,524 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:02:59,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:02:59,525 INFO L85 PathProgramCache]: Analyzing trace with hash -519843690, now seen corresponding path program 1 times [2022-07-20 06:02:59,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:02:59,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322410213] [2022-07-20 06:02:59,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:02:59,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:02:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:02:59,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:02:59,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:02:59,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322410213] [2022-07-20 06:02:59,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322410213] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:02:59,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:02:59,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 06:02:59,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589880996] [2022-07-20 06:02:59,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:02:59,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 06:02:59,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:02:59,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 06:02:59,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:02:59,564 INFO L87 Difference]: Start difference. First operand 252 states and 276 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:02:59,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:02:59,678 INFO L93 Difference]: Finished difference Result 714 states and 789 transitions. [2022-07-20 06:02:59,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 06:02:59,679 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-20 06:02:59,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:02:59,681 INFO L225 Difference]: With dead ends: 714 [2022-07-20 06:02:59,681 INFO L226 Difference]: Without dead ends: 714 [2022-07-20 06:02:59,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:02:59,681 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 1478 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:02:59,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1480 Valid, 705 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:02:59,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-07-20 06:02:59,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 280. [2022-07-20 06:02:59,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 168 states have (on average 1.8571428571428572) internal successors, (312), 277 states have internal predecessors, (312), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:02:59,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 328 transitions. [2022-07-20 06:02:59,687 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 328 transitions. Word has length 19 [2022-07-20 06:02:59,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:02:59,687 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 328 transitions. [2022-07-20 06:02:59,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:02:59,687 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 328 transitions. [2022-07-20 06:02:59,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-20 06:02:59,688 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:02:59,688 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:02:59,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-20 06:02:59,688 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:02:59,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:02:59,688 INFO L85 PathProgramCache]: Analyzing trace with hash -519854939, now seen corresponding path program 1 times [2022-07-20 06:02:59,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:02:59,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154051614] [2022-07-20 06:02:59,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:02:59,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:02:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:02:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:02:59,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:02:59,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154051614] [2022-07-20 06:02:59,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154051614] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:02:59,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:02:59,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 06:02:59,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7020339] [2022-07-20 06:02:59,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:02:59,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 06:02:59,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:02:59,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 06:02:59,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:02:59,738 INFO L87 Difference]: Start difference. First operand 280 states and 328 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:00,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:00,026 INFO L93 Difference]: Finished difference Result 466 states and 533 transitions. [2022-07-20 06:03:00,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 06:03:00,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2022-07-20 06:03:00,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:00,028 INFO L225 Difference]: With dead ends: 466 [2022-07-20 06:03:00,028 INFO L226 Difference]: Without dead ends: 466 [2022-07-20 06:03:00,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:03:00,029 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 646 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:00,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [648 Valid, 547 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 06:03:00,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-07-20 06:03:00,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 271. [2022-07-20 06:03:00,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 168 states have (on average 1.7857142857142858) internal successors, (300), 268 states have internal predecessors, (300), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:00,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 316 transitions. [2022-07-20 06:03:00,034 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 316 transitions. Word has length 19 [2022-07-20 06:03:00,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:00,035 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 316 transitions. [2022-07-20 06:03:00,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:00,035 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 316 transitions. [2022-07-20 06:03:00,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-20 06:03:00,035 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:00,036 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:00,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-20 06:03:00,036 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:00,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:00,036 INFO L85 PathProgramCache]: Analyzing trace with hash -519854938, now seen corresponding path program 1 times [2022-07-20 06:03:00,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:00,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359649667] [2022-07-20 06:03:00,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:00,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:00,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:00,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:00,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359649667] [2022-07-20 06:03:00,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359649667] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:03:00,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:03:00,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 06:03:00,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345422408] [2022-07-20 06:03:00,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:03:00,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 06:03:00,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:00,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 06:03:00,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:03:00,081 INFO L87 Difference]: Start difference. First operand 271 states and 316 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:00,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:00,382 INFO L93 Difference]: Finished difference Result 606 states and 668 transitions. [2022-07-20 06:03:00,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 06:03:00,383 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2022-07-20 06:03:00,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:00,385 INFO L225 Difference]: With dead ends: 606 [2022-07-20 06:03:00,385 INFO L226 Difference]: Without dead ends: 606 [2022-07-20 06:03:00,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:03:00,386 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 891 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:00,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [891 Valid, 571 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 06:03:00,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-07-20 06:03:00,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 291. [2022-07-20 06:03:00,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 188 states have (on average 1.7234042553191489) internal successors, (324), 288 states have internal predecessors, (324), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:00,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 340 transitions. [2022-07-20 06:03:00,393 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 340 transitions. Word has length 19 [2022-07-20 06:03:00,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:00,394 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 340 transitions. [2022-07-20 06:03:00,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:00,394 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 340 transitions. [2022-07-20 06:03:00,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-20 06:03:00,394 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:00,395 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:00,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-20 06:03:00,395 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:00,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:00,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1987558854, now seen corresponding path program 1 times [2022-07-20 06:03:00,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:00,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362970585] [2022-07-20 06:03:00,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:00,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:00,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:00,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 06:03:00,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:00,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362970585] [2022-07-20 06:03:00,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362970585] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:03:00,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:03:00,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 06:03:00,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092106343] [2022-07-20 06:03:00,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:03:00,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 06:03:00,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:00,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 06:03:00,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:03:00,472 INFO L87 Difference]: Start difference. First operand 291 states and 340 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:00,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:00,591 INFO L93 Difference]: Finished difference Result 373 states and 428 transitions. [2022-07-20 06:03:00,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:03:00,592 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-20 06:03:00,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:00,594 INFO L225 Difference]: With dead ends: 373 [2022-07-20 06:03:00,594 INFO L226 Difference]: Without dead ends: 373 [2022-07-20 06:03:00,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:03:00,595 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 103 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:00,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 838 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:03:00,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-07-20 06:03:00,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 290. [2022-07-20 06:03:00,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 188 states have (on average 1.7127659574468086) internal successors, (322), 287 states have internal predecessors, (322), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:00,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 337 transitions. [2022-07-20 06:03:00,601 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 337 transitions. Word has length 26 [2022-07-20 06:03:00,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:00,602 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 337 transitions. [2022-07-20 06:03:00,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:00,603 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 337 transitions. [2022-07-20 06:03:00,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-20 06:03:00,605 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:00,605 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:00,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-20 06:03:00,606 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:00,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:00,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1626991364, now seen corresponding path program 1 times [2022-07-20 06:03:00,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:00,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117095552] [2022-07-20 06:03:00,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:00,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:00,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:00,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 06:03:00,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:00,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117095552] [2022-07-20 06:03:00,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117095552] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:03:00,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:03:00,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 06:03:00,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553898800] [2022-07-20 06:03:00,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:03:00,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 06:03:00,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:00,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 06:03:00,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:03:00,660 INFO L87 Difference]: Start difference. First operand 290 states and 337 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:00,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:00,757 INFO L93 Difference]: Finished difference Result 289 states and 334 transitions. [2022-07-20 06:03:00,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:03:00,758 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-20 06:03:00,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:00,759 INFO L225 Difference]: With dead ends: 289 [2022-07-20 06:03:00,759 INFO L226 Difference]: Without dead ends: 289 [2022-07-20 06:03:00,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:03:00,760 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 19 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:00,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 863 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:03:00,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-07-20 06:03:00,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-07-20 06:03:00,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 188 states have (on average 1.702127659574468) internal successors, (320), 286 states have internal predecessors, (320), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:00,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 334 transitions. [2022-07-20 06:03:00,765 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 334 transitions. Word has length 26 [2022-07-20 06:03:00,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:00,765 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 334 transitions. [2022-07-20 06:03:00,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:00,765 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 334 transitions. [2022-07-20 06:03:00,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-20 06:03:00,766 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:00,766 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:00,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-20 06:03:00,766 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:00,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:00,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1169692160, now seen corresponding path program 1 times [2022-07-20 06:03:00,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:00,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210197252] [2022-07-20 06:03:00,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:00,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:00,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:00,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:00,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:00,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210197252] [2022-07-20 06:03:00,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210197252] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:03:00,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:03:00,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 06:03:00,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030365712] [2022-07-20 06:03:00,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:03:00,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 06:03:00,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:00,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 06:03:00,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:03:00,817 INFO L87 Difference]: Start difference. First operand 289 states and 334 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:01,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:01,049 INFO L93 Difference]: Finished difference Result 602 states and 659 transitions. [2022-07-20 06:03:01,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 06:03:01,050 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-20 06:03:01,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:01,052 INFO L225 Difference]: With dead ends: 602 [2022-07-20 06:03:01,052 INFO L226 Difference]: Without dead ends: 602 [2022-07-20 06:03:01,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-07-20 06:03:01,053 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 1279 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1281 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:01,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1281 Valid, 1037 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:03:01,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2022-07-20 06:03:01,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 289. [2022-07-20 06:03:01,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 188 states have (on average 1.696808510638298) internal successors, (319), 286 states have internal predecessors, (319), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:01,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 333 transitions. [2022-07-20 06:03:01,059 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 333 transitions. Word has length 29 [2022-07-20 06:03:01,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:01,060 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 333 transitions. [2022-07-20 06:03:01,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:01,060 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 333 transitions. [2022-07-20 06:03:01,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-20 06:03:01,060 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:01,060 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:01,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-20 06:03:01,061 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:01,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:01,061 INFO L85 PathProgramCache]: Analyzing trace with hash 698957523, now seen corresponding path program 1 times [2022-07-20 06:03:01,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:01,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299682459] [2022-07-20 06:03:01,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:01,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:01,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:01,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:01,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299682459] [2022-07-20 06:03:01,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299682459] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:03:01,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:03:01,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 06:03:01,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468794650] [2022-07-20 06:03:01,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:03:01,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 06:03:01,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:01,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 06:03:01,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:03:01,109 INFO L87 Difference]: Start difference. First operand 289 states and 333 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:01,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:01,351 INFO L93 Difference]: Finished difference Result 601 states and 657 transitions. [2022-07-20 06:03:01,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 06:03:01,351 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-20 06:03:01,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:01,354 INFO L225 Difference]: With dead ends: 601 [2022-07-20 06:03:01,354 INFO L226 Difference]: Without dead ends: 601 [2022-07-20 06:03:01,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-07-20 06:03:01,357 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 1275 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:01,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1277 Valid, 1037 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:03:01,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-07-20 06:03:01,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 289. [2022-07-20 06:03:01,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 188 states have (on average 1.6914893617021276) internal successors, (318), 286 states have internal predecessors, (318), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:01,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 332 transitions. [2022-07-20 06:03:01,361 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 332 transitions. Word has length 29 [2022-07-20 06:03:01,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:01,362 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 332 transitions. [2022-07-20 06:03:01,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:01,362 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 332 transitions. [2022-07-20 06:03:01,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-20 06:03:01,363 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:01,363 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:01,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-20 06:03:01,363 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:01,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:01,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1900933732, now seen corresponding path program 1 times [2022-07-20 06:03:01,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:01,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754240594] [2022-07-20 06:03:01,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:01,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:01,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:01,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:01,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754240594] [2022-07-20 06:03:01,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754240594] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:03:01,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:03:01,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-20 06:03:01,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191876032] [2022-07-20 06:03:01,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:03:01,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 06:03:01,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:01,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 06:03:01,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-20 06:03:01,470 INFO L87 Difference]: Start difference. First operand 289 states and 332 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 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) [2022-07-20 06:03:01,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:01,945 INFO L93 Difference]: Finished difference Result 674 states and 745 transitions. [2022-07-20 06:03:01,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 06:03:01,945 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 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) Word has length 30 [2022-07-20 06:03:01,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:01,947 INFO L225 Difference]: With dead ends: 674 [2022-07-20 06:03:01,947 INFO L226 Difference]: Without dead ends: 674 [2022-07-20 06:03:01,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-07-20 06:03:01,948 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 1607 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1609 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:01,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1609 Valid, 806 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 06:03:01,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-07-20 06:03:01,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 290. [2022-07-20 06:03:01,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 189 states have (on average 1.693121693121693) internal successors, (320), 287 states have internal predecessors, (320), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:01,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 334 transitions. [2022-07-20 06:03:01,953 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 334 transitions. Word has length 30 [2022-07-20 06:03:01,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:01,954 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 334 transitions. [2022-07-20 06:03:01,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 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) [2022-07-20 06:03:01,954 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 334 transitions. [2022-07-20 06:03:01,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-20 06:03:01,954 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:01,954 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:01,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-20 06:03:01,954 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:01,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:01,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1900933731, now seen corresponding path program 1 times [2022-07-20 06:03:01,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:01,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663389174] [2022-07-20 06:03:01,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:01,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:01,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:02,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:02,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:02,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663389174] [2022-07-20 06:03:02,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663389174] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:03:02,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:03:02,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-20 06:03:02,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168600649] [2022-07-20 06:03:02,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:03:02,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 06:03:02,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:02,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 06:03:02,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-20 06:03:02,054 INFO L87 Difference]: Start difference. First operand 290 states and 334 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 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) [2022-07-20 06:03:02,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:02,758 INFO L93 Difference]: Finished difference Result 799 states and 878 transitions. [2022-07-20 06:03:02,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 06:03:02,759 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 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) Word has length 30 [2022-07-20 06:03:02,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:02,765 INFO L225 Difference]: With dead ends: 799 [2022-07-20 06:03:02,765 INFO L226 Difference]: Without dead ends: 799 [2022-07-20 06:03:02,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-07-20 06:03:02,766 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 1762 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1762 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:02,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1762 Valid, 769 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 06:03:02,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-07-20 06:03:02,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 290. [2022-07-20 06:03:02,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 189 states have (on average 1.687830687830688) internal successors, (319), 287 states have internal predecessors, (319), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:02,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 333 transitions. [2022-07-20 06:03:02,771 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 333 transitions. Word has length 30 [2022-07-20 06:03:02,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:02,772 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 333 transitions. [2022-07-20 06:03:02,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 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) [2022-07-20 06:03:02,772 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 333 transitions. [2022-07-20 06:03:02,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-20 06:03:02,772 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:02,772 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:02,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-20 06:03:02,772 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:02,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:02,773 INFO L85 PathProgramCache]: Analyzing trace with hash 192556862, now seen corresponding path program 1 times [2022-07-20 06:03:02,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:02,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93192998] [2022-07-20 06:03:02,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:02,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:02,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:02,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:02,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:02,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93192998] [2022-07-20 06:03:02,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93192998] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:03:02,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:03:02,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-20 06:03:02,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208200955] [2022-07-20 06:03:02,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:03:02,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 06:03:02,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:02,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 06:03:02,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-20 06:03:02,886 INFO L87 Difference]: Start difference. First operand 290 states and 333 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 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) [2022-07-20 06:03:03,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:03,420 INFO L93 Difference]: Finished difference Result 672 states and 743 transitions. [2022-07-20 06:03:03,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 06:03:03,420 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 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) Word has length 30 [2022-07-20 06:03:03,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:03,422 INFO L225 Difference]: With dead ends: 672 [2022-07-20 06:03:03,422 INFO L226 Difference]: Without dead ends: 672 [2022-07-20 06:03:03,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-07-20 06:03:03,423 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 1440 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1442 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:03,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1442 Valid, 981 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 06:03:03,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-07-20 06:03:03,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 290. [2022-07-20 06:03:03,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 189 states have (on average 1.6825396825396826) internal successors, (318), 287 states have internal predecessors, (318), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:03,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 332 transitions. [2022-07-20 06:03:03,430 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 332 transitions. Word has length 30 [2022-07-20 06:03:03,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:03,430 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 332 transitions. [2022-07-20 06:03:03,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 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) [2022-07-20 06:03:03,430 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 332 transitions. [2022-07-20 06:03:03,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-20 06:03:03,430 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:03,430 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:03,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-20 06:03:03,430 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:03,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:03,431 INFO L85 PathProgramCache]: Analyzing trace with hash 192556863, now seen corresponding path program 1 times [2022-07-20 06:03:03,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:03,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884020545] [2022-07-20 06:03:03,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:03,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:03,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:03,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:03,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884020545] [2022-07-20 06:03:03,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884020545] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:03:03,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:03:03,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-20 06:03:03,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736096953] [2022-07-20 06:03:03,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:03:03,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 06:03:03,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:03,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 06:03:03,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-20 06:03:03,507 INFO L87 Difference]: Start difference. First operand 290 states and 332 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 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) [2022-07-20 06:03:04,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:04,273 INFO L93 Difference]: Finished difference Result 797 states and 876 transitions. [2022-07-20 06:03:04,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 06:03:04,274 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 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) Word has length 30 [2022-07-20 06:03:04,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:04,276 INFO L225 Difference]: With dead ends: 797 [2022-07-20 06:03:04,276 INFO L226 Difference]: Without dead ends: 797 [2022-07-20 06:03:04,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-07-20 06:03:04,277 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 1625 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1625 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:04,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1625 Valid, 882 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 06:03:04,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-07-20 06:03:04,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 290. [2022-07-20 06:03:04,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 189 states have (on average 1.6772486772486772) internal successors, (317), 287 states have internal predecessors, (317), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:04,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 331 transitions. [2022-07-20 06:03:04,283 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 331 transitions. Word has length 30 [2022-07-20 06:03:04,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:04,284 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 331 transitions. [2022-07-20 06:03:04,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 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) [2022-07-20 06:03:04,284 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 331 transitions. [2022-07-20 06:03:04,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-20 06:03:04,284 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:04,285 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:04,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-20 06:03:04,285 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:04,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:04,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1572782387, now seen corresponding path program 1 times [2022-07-20 06:03:04,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:04,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438513302] [2022-07-20 06:03:04,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:04,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:04,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:04,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438513302] [2022-07-20 06:03:04,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438513302] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:03:04,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:03:04,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-20 06:03:04,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104107969] [2022-07-20 06:03:04,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:03:04,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 06:03:04,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:04,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 06:03:04,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-20 06:03:04,396 INFO L87 Difference]: Start difference. First operand 290 states and 331 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:04,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:04,988 INFO L93 Difference]: Finished difference Result 596 states and 651 transitions. [2022-07-20 06:03:04,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 06:03:04,988 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-20 06:03:04,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:04,990 INFO L225 Difference]: With dead ends: 596 [2022-07-20 06:03:04,990 INFO L226 Difference]: Without dead ends: 596 [2022-07-20 06:03:04,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2022-07-20 06:03:04,991 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 1594 mSDsluCounter, 1327 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1594 SdHoareTripleChecker+Valid, 1531 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:04,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1594 Valid, 1531 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 06:03:04,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-07-20 06:03:04,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 291. [2022-07-20 06:03:04,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 190 states have (on average 1.6736842105263159) internal successors, (318), 288 states have internal predecessors, (318), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:04,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 332 transitions. [2022-07-20 06:03:04,996 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 332 transitions. Word has length 33 [2022-07-20 06:03:04,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:04,997 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 332 transitions. [2022-07-20 06:03:04,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:04,997 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 332 transitions. [2022-07-20 06:03:04,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-20 06:03:04,997 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:04,997 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:04,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-20 06:03:04,998 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:04,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:04,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1614681760, now seen corresponding path program 1 times [2022-07-20 06:03:04,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:04,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508527799] [2022-07-20 06:03:04,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:04,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:05,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:05,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:05,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:05,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508527799] [2022-07-20 06:03:05,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508527799] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:03:05,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:03:05,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-20 06:03:05,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426749330] [2022-07-20 06:03:05,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:03:05,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 06:03:05,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:05,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 06:03:05,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-20 06:03:05,103 INFO L87 Difference]: Start difference. First operand 291 states and 332 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:05,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:05,688 INFO L93 Difference]: Finished difference Result 595 states and 649 transitions. [2022-07-20 06:03:05,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 06:03:05,688 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-20 06:03:05,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:05,690 INFO L225 Difference]: With dead ends: 595 [2022-07-20 06:03:05,690 INFO L226 Difference]: Without dead ends: 595 [2022-07-20 06:03:05,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2022-07-20 06:03:05,691 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 1998 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1998 SdHoareTripleChecker+Valid, 1374 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:05,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1998 Valid, 1374 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 06:03:05,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-07-20 06:03:05,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 291. [2022-07-20 06:03:05,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 190 states have (on average 1.668421052631579) internal successors, (317), 288 states have internal predecessors, (317), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:05,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 331 transitions. [2022-07-20 06:03:05,696 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 331 transitions. Word has length 33 [2022-07-20 06:03:05,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:05,696 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 331 transitions. [2022-07-20 06:03:05,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:05,696 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 331 transitions. [2022-07-20 06:03:05,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-20 06:03:05,696 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:05,696 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:05,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-20 06:03:05,696 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:05,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:05,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1234347779, now seen corresponding path program 1 times [2022-07-20 06:03:05,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:05,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254142644] [2022-07-20 06:03:05,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:05,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:05,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:05,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:05,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:05,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254142644] [2022-07-20 06:03:05,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254142644] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:03:05,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137738504] [2022-07-20 06:03:05,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:05,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:03:05,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:03:05,831 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) [2022-07-20 06:03:05,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 06:03:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:05,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-20 06:03:05,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:03:06,060 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 13 treesize of output 9 [2022-07-20 06:03:06,075 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 13 treesize of output 9 [2022-07-20 06:03:06,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:03:06,174 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 19 treesize of output 7 [2022-07-20 06:03:06,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:06,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:03:06,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:06,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137738504] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:03:06,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:03:06,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 17 [2022-07-20 06:03:06,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479928664] [2022-07-20 06:03:06,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:03:06,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 06:03:06,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:06,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 06:03:06,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-07-20 06:03:06,336 INFO L87 Difference]: Start difference. First operand 291 states and 331 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:06,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:06,759 INFO L93 Difference]: Finished difference Result 486 states and 543 transitions. [2022-07-20 06:03:06,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 06:03:06,762 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 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 [2022-07-20 06:03:06,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:06,763 INFO L225 Difference]: With dead ends: 486 [2022-07-20 06:03:06,763 INFO L226 Difference]: Without dead ends: 486 [2022-07-20 06:03:06,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-07-20 06:03:06,764 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 667 mSDsluCounter, 2483 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 2710 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:06,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 2710 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 06:03:06,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-07-20 06:03:06,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 307. [2022-07-20 06:03:06,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 206 states have (on average 1.6213592233009708) internal successors, (334), 304 states have internal predecessors, (334), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:06,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 348 transitions. [2022-07-20 06:03:06,769 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 348 transitions. Word has length 35 [2022-07-20 06:03:06,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:06,769 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 348 transitions. [2022-07-20 06:03:06,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:06,769 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 348 transitions. [2022-07-20 06:03:06,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-20 06:03:06,769 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:06,769 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:06,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 06:03:06,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-20 06:03:06,989 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:06,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:06,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1275174605, now seen corresponding path program 1 times [2022-07-20 06:03:06,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:06,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030353466] [2022-07-20 06:03:06,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:06,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:07,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:07,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:07,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:07,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030353466] [2022-07-20 06:03:07,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030353466] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:03:07,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:03:07,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 06:03:07,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472447923] [2022-07-20 06:03:07,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:03:07,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 06:03:07,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:07,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 06:03:07,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:03:07,046 INFO L87 Difference]: Start difference. First operand 307 states and 348 transitions. Second operand has 5 states, 4 states have (on average 9.25) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:07,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:07,286 INFO L93 Difference]: Finished difference Result 499 states and 544 transitions. [2022-07-20 06:03:07,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 06:03:07,287 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.25) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2022-07-20 06:03:07,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:07,288 INFO L225 Difference]: With dead ends: 499 [2022-07-20 06:03:07,288 INFO L226 Difference]: Without dead ends: 499 [2022-07-20 06:03:07,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:03:07,289 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 479 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:07,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 609 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:03:07,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-07-20 06:03:07,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 313. [2022-07-20 06:03:07,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 212 states have (on average 1.6273584905660377) internal successors, (345), 310 states have internal predecessors, (345), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:07,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 359 transitions. [2022-07-20 06:03:07,294 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 359 transitions. Word has length 37 [2022-07-20 06:03:07,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:07,294 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 359 transitions. [2022-07-20 06:03:07,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.25) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:07,294 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 359 transitions. [2022-07-20 06:03:07,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-20 06:03:07,295 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:07,295 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:07,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-20 06:03:07,295 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:07,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:07,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1275174606, now seen corresponding path program 1 times [2022-07-20 06:03:07,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:07,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286508846] [2022-07-20 06:03:07,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:07,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 06:03:07,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:07,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286508846] [2022-07-20 06:03:07,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286508846] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:03:07,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:03:07,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 06:03:07,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22236011] [2022-07-20 06:03:07,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:03:07,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 06:03:07,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:07,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 06:03:07,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:03:07,327 INFO L87 Difference]: Start difference. First operand 313 states and 359 transitions. Second operand has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 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) [2022-07-20 06:03:07,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:07,586 INFO L93 Difference]: Finished difference Result 632 states and 714 transitions. [2022-07-20 06:03:07,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 06:03:07,587 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 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) Word has length 37 [2022-07-20 06:03:07,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:07,589 INFO L225 Difference]: With dead ends: 632 [2022-07-20 06:03:07,589 INFO L226 Difference]: Without dead ends: 632 [2022-07-20 06:03:07,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-20 06:03:07,589 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 995 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 997 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:07,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [997 Valid, 556 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:03:07,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-07-20 06:03:07,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 313. [2022-07-20 06:03:07,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 214 states have (on average 1.6074766355140186) internal successors, (344), 310 states have internal predecessors, (344), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:07,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 358 transitions. [2022-07-20 06:03:07,595 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 358 transitions. Word has length 37 [2022-07-20 06:03:07,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:07,595 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 358 transitions. [2022-07-20 06:03:07,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 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) [2022-07-20 06:03:07,595 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 358 transitions. [2022-07-20 06:03:07,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-20 06:03:07,596 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:07,596 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:07,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-20 06:03:07,596 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:07,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:07,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1375067782, now seen corresponding path program 1 times [2022-07-20 06:03:07,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:07,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010120233] [2022-07-20 06:03:07,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:07,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:07,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:07,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:07,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010120233] [2022-07-20 06:03:07,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010120233] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:03:07,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:03:07,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 06:03:07,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274504680] [2022-07-20 06:03:07,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:03:07,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 06:03:07,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:07,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 06:03:07,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:03:07,628 INFO L87 Difference]: Start difference. First operand 313 states and 358 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:07,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:07,691 INFO L93 Difference]: Finished difference Result 426 states and 467 transitions. [2022-07-20 06:03:07,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 06:03:07,691 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-20 06:03:07,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:07,693 INFO L225 Difference]: With dead ends: 426 [2022-07-20 06:03:07,693 INFO L226 Difference]: Without dead ends: 426 [2022-07-20 06:03:07,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-20 06:03:07,694 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 804 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:07,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [806 Valid, 904 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:03:07,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-07-20 06:03:07,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 313. [2022-07-20 06:03:07,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 214 states have (on average 1.602803738317757) internal successors, (343), 310 states have internal predecessors, (343), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:07,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 357 transitions. [2022-07-20 06:03:07,698 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 357 transitions. Word has length 39 [2022-07-20 06:03:07,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:07,699 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 357 transitions. [2022-07-20 06:03:07,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:07,699 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 357 transitions. [2022-07-20 06:03:07,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-20 06:03:07,699 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:07,699 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:07,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-20 06:03:07,700 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr67REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:07,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:07,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1375068993, now seen corresponding path program 1 times [2022-07-20 06:03:07,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:07,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756120567] [2022-07-20 06:03:07,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:07,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:07,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:07,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 06:03:07,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:07,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756120567] [2022-07-20 06:03:07,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756120567] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:03:07,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:03:07,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 06:03:07,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216948477] [2022-07-20 06:03:07,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:03:07,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 06:03:07,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:07,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 06:03:07,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:03:07,742 INFO L87 Difference]: Start difference. First operand 313 states and 357 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 6 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) [2022-07-20 06:03:08,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:08,032 INFO L93 Difference]: Finished difference Result 573 states and 644 transitions. [2022-07-20 06:03:08,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 06:03:08,033 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 6 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 39 [2022-07-20 06:03:08,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:08,035 INFO L225 Difference]: With dead ends: 573 [2022-07-20 06:03:08,035 INFO L226 Difference]: Without dead ends: 573 [2022-07-20 06:03:08,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:03:08,035 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 466 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:08,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 719 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 06:03:08,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-07-20 06:03:08,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 310. [2022-07-20 06:03:08,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 214 states have (on average 1.574766355140187) internal successors, (337), 307 states have internal predecessors, (337), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:08,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 351 transitions. [2022-07-20 06:03:08,041 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 351 transitions. Word has length 39 [2022-07-20 06:03:08,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:08,041 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 351 transitions. [2022-07-20 06:03:08,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 6 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) [2022-07-20 06:03:08,041 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 351 transitions. [2022-07-20 06:03:08,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-20 06:03:08,041 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:08,041 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:08,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-20 06:03:08,042 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr68REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:08,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:08,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1375068992, now seen corresponding path program 1 times [2022-07-20 06:03:08,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:08,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56491975] [2022-07-20 06:03:08,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:08,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:08,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:08,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:08,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56491975] [2022-07-20 06:03:08,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56491975] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:03:08,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:03:08,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 06:03:08,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024662343] [2022-07-20 06:03:08,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:03:08,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 06:03:08,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:08,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 06:03:08,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:03:08,103 INFO L87 Difference]: Start difference. First operand 310 states and 351 transitions. Second operand has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:08,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:08,321 INFO L93 Difference]: Finished difference Result 418 states and 458 transitions. [2022-07-20 06:03:08,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:03:08,322 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2022-07-20 06:03:08,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:08,323 INFO L225 Difference]: With dead ends: 418 [2022-07-20 06:03:08,323 INFO L226 Difference]: Without dead ends: 418 [2022-07-20 06:03:08,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:03:08,323 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 356 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:08,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 557 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:03:08,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-07-20 06:03:08,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 310. [2022-07-20 06:03:08,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 214 states have (on average 1.560747663551402) internal successors, (334), 307 states have internal predecessors, (334), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:08,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 348 transitions. [2022-07-20 06:03:08,328 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 348 transitions. Word has length 39 [2022-07-20 06:03:08,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:08,328 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 348 transitions. [2022-07-20 06:03:08,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:08,329 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 348 transitions. [2022-07-20 06:03:08,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-20 06:03:08,329 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:08,329 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:08,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-20 06:03:08,330 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:08,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:08,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1377050303, now seen corresponding path program 1 times [2022-07-20 06:03:08,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:08,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029979992] [2022-07-20 06:03:08,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:08,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:08,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:08,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:08,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029979992] [2022-07-20 06:03:08,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029979992] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:03:08,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:03:08,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 06:03:08,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998702555] [2022-07-20 06:03:08,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:03:08,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 06:03:08,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:08,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 06:03:08,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:03:08,361 INFO L87 Difference]: Start difference. First operand 310 states and 348 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:08,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:08,463 INFO L93 Difference]: Finished difference Result 541 states and 594 transitions. [2022-07-20 06:03:08,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 06:03:08,464 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2022-07-20 06:03:08,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:08,465 INFO L225 Difference]: With dead ends: 541 [2022-07-20 06:03:08,465 INFO L226 Difference]: Without dead ends: 541 [2022-07-20 06:03:08,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-20 06:03:08,466 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 1088 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1090 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:08,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1090 Valid, 1014 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:03:08,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-07-20 06:03:08,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 310. [2022-07-20 06:03:08,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 214 states have (on average 1.5560747663551402) internal successors, (333), 307 states have internal predecessors, (333), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:08,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 347 transitions. [2022-07-20 06:03:08,472 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 347 transitions. Word has length 39 [2022-07-20 06:03:08,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:08,473 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 347 transitions. [2022-07-20 06:03:08,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:08,473 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 347 transitions. [2022-07-20 06:03:08,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-20 06:03:08,473 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:08,473 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:08,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-20 06:03:08,474 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:08,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:08,474 INFO L85 PathProgramCache]: Analyzing trace with hash 718105722, now seen corresponding path program 1 times [2022-07-20 06:03:08,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:08,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343315934] [2022-07-20 06:03:08,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:08,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:08,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:08,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:08,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:08,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343315934] [2022-07-20 06:03:08,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343315934] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:03:08,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198648153] [2022-07-20 06:03:08,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:08,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:03:08,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:03:08,616 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) [2022-07-20 06:03:08,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 06:03:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:08,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-20 06:03:08,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:03:08,904 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 [2022-07-20 06:03:08,910 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 [2022-07-20 06:03:08,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:08,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:03:08,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198648153] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:03:08,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 06:03:08,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 15 [2022-07-20 06:03:08,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749114174] [2022-07-20 06:03:08,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:03:08,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 06:03:08,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:08,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 06:03:08,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-07-20 06:03:08,916 INFO L87 Difference]: Start difference. First operand 310 states and 347 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:09,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:09,208 INFO L93 Difference]: Finished difference Result 547 states and 601 transitions. [2022-07-20 06:03:09,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 06:03:09,210 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-20 06:03:09,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:09,212 INFO L225 Difference]: With dead ends: 547 [2022-07-20 06:03:09,212 INFO L226 Difference]: Without dead ends: 547 [2022-07-20 06:03:09,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-07-20 06:03:09,213 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 1096 mSDsluCounter, 1139 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1098 SdHoareTripleChecker+Valid, 1369 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:09,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1098 Valid, 1369 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:03:09,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-07-20 06:03:09,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 319. [2022-07-20 06:03:09,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 223 states have (on average 1.5381165919282511) internal successors, (343), 316 states have internal predecessors, (343), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:09,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 357 transitions. [2022-07-20 06:03:09,218 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 357 transitions. Word has length 42 [2022-07-20 06:03:09,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:09,218 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 357 transitions. [2022-07-20 06:03:09,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:09,218 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 357 transitions. [2022-07-20 06:03:09,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-20 06:03:09,218 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:09,218 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:09,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 06:03:09,438 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,SelfDestructingSolverStorable28 [2022-07-20 06:03:09,438 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:09,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:09,439 INFO L85 PathProgramCache]: Analyzing trace with hash -551533569, now seen corresponding path program 1 times [2022-07-20 06:03:09,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:09,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124175163] [2022-07-20 06:03:09,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:09,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:09,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:09,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124175163] [2022-07-20 06:03:09,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124175163] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:03:09,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824994778] [2022-07-20 06:03:09,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:09,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:03:09,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:03:09,543 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) [2022-07-20 06:03:09,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 06:03:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:09,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-20 06:03:09,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:03:09,689 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 13 treesize of output 9 [2022-07-20 06:03:09,693 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 13 treesize of output 9 [2022-07-20 06:03:09,764 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 [2022-07-20 06:03:09,767 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 [2022-07-20 06:03:09,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:09,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:03:09,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:09,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824994778] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:03:09,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:03:09,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 12 [2022-07-20 06:03:09,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230944544] [2022-07-20 06:03:09,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:03:09,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 06:03:09,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:09,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 06:03:09,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-20 06:03:09,855 INFO L87 Difference]: Start difference. First operand 319 states and 357 transitions. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:10,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:10,078 INFO L93 Difference]: Finished difference Result 386 states and 427 transitions. [2022-07-20 06:03:10,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 06:03:10,078 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 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 41 [2022-07-20 06:03:10,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:10,079 INFO L225 Difference]: With dead ends: 386 [2022-07-20 06:03:10,079 INFO L226 Difference]: Without dead ends: 386 [2022-07-20 06:03:10,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-07-20 06:03:10,080 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 133 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 1689 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:10,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 1689 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:03:10,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-07-20 06:03:10,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 334. [2022-07-20 06:03:10,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 238 states have (on average 1.504201680672269) internal successors, (358), 331 states have internal predecessors, (358), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:10,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 372 transitions. [2022-07-20 06:03:10,087 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 372 transitions. Word has length 41 [2022-07-20 06:03:10,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:10,087 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 372 transitions. [2022-07-20 06:03:10,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:10,088 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 372 transitions. [2022-07-20 06:03:10,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-20 06:03:10,088 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:10,088 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:10,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 06:03:10,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:03:10,299 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:10,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:10,300 INFO L85 PathProgramCache]: Analyzing trace with hash -163923031, now seen corresponding path program 1 times [2022-07-20 06:03:10,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:10,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703058347] [2022-07-20 06:03:10,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:10,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:10,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:10,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:10,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703058347] [2022-07-20 06:03:10,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703058347] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:03:10,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:03:10,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-20 06:03:10,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666725277] [2022-07-20 06:03:10,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:03:10,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 06:03:10,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:10,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 06:03:10,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-07-20 06:03:10,386 INFO L87 Difference]: Start difference. First operand 334 states and 372 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:10,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:10,708 INFO L93 Difference]: Finished difference Result 423 states and 458 transitions. [2022-07-20 06:03:10,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 06:03:10,709 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-20 06:03:10,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:10,710 INFO L225 Difference]: With dead ends: 423 [2022-07-20 06:03:10,710 INFO L226 Difference]: Without dead ends: 423 [2022-07-20 06:03:10,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-07-20 06:03:10,711 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 911 mSDsluCounter, 1522 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 913 SdHoareTripleChecker+Valid, 1740 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:10,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [913 Valid, 1740 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:03:10,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-07-20 06:03:10,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 337. [2022-07-20 06:03:10,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 241 states have (on average 1.4979253112033195) internal successors, (361), 334 states have internal predecessors, (361), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:10,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 375 transitions. [2022-07-20 06:03:10,715 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 375 transitions. Word has length 45 [2022-07-20 06:03:10,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:10,715 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 375 transitions. [2022-07-20 06:03:10,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:10,715 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 375 transitions. [2022-07-20 06:03:10,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-20 06:03:10,715 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:10,715 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:10,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-20 06:03:10,716 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:10,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:10,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1832676911, now seen corresponding path program 2 times [2022-07-20 06:03:10,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:10,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853229861] [2022-07-20 06:03:10,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:10,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:10,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:10,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:10,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853229861] [2022-07-20 06:03:10,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853229861] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:03:10,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791368870] [2022-07-20 06:03:10,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 06:03:10,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:03:10,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:03:10,833 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) [2022-07-20 06:03:10,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 06:03:10,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 06:03:10,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:03:10,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-20 06:03:10,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:03:10,972 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 [2022-07-20 06:03:11,000 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 06:03:11,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 06:03:11,021 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 06:03:11,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 06:03:11,050 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 13 treesize of output 9 [2022-07-20 06:03:11,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:03:11,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2022-07-20 06:03:11,224 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:11,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:03:11,377 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 16 treesize of output 14 [2022-07-20 06:03:11,389 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 32 treesize of output 28 [2022-07-20 06:03:11,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:11,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791368870] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:03:11,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:03:11,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 23 [2022-07-20 06:03:11,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234518803] [2022-07-20 06:03:11,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:03:11,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-20 06:03:11,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:11,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-20 06:03:11,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-07-20 06:03:11,529 INFO L87 Difference]: Start difference. First operand 337 states and 375 transitions. Second operand has 24 states, 23 states have (on average 4.826086956521739) internal successors, (111), 24 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:12,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:12,556 INFO L93 Difference]: Finished difference Result 621 states and 680 transitions. [2022-07-20 06:03:12,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-20 06:03:12,557 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.826086956521739) internal successors, (111), 24 states have internal predecessors, (111), 0 states have call successors, (0), 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 46 [2022-07-20 06:03:12,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:12,558 INFO L225 Difference]: With dead ends: 621 [2022-07-20 06:03:12,558 INFO L226 Difference]: Without dead ends: 621 [2022-07-20 06:03:12,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=292, Invalid=1190, Unknown=0, NotChecked=0, Total=1482 [2022-07-20 06:03:12,559 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 1898 mSDsluCounter, 2480 mSDsCounter, 0 mSdLazyCounter, 1703 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1900 SdHoareTripleChecker+Valid, 2703 SdHoareTripleChecker+Invalid, 2486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 724 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:12,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1900 Valid, 2703 Invalid, 2486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1703 Invalid, 0 Unknown, 724 Unchecked, 0.7s Time] [2022-07-20 06:03:12,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-07-20 06:03:12,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 339. [2022-07-20 06:03:12,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 243 states have (on average 1.4979423868312758) internal successors, (364), 336 states have internal predecessors, (364), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:12,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 378 transitions. [2022-07-20 06:03:12,564 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 378 transitions. Word has length 46 [2022-07-20 06:03:12,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:12,565 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 378 transitions. [2022-07-20 06:03:12,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.826086956521739) internal successors, (111), 24 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:12,565 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 378 transitions. [2022-07-20 06:03:12,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-20 06:03:12,565 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:12,565 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:12,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 06:03:12,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:03:12,783 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:12,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:12,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1832676912, now seen corresponding path program 1 times [2022-07-20 06:03:12,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:12,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680146799] [2022-07-20 06:03:12,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:12,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:12,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:12,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:12,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:12,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680146799] [2022-07-20 06:03:12,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680146799] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:03:12,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860066058] [2022-07-20 06:03:12,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:12,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:03:12,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:03:12,981 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) [2022-07-20 06:03:12,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 06:03:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:13,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-20 06:03:13,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:03:13,126 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 [2022-07-20 06:03:13,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:03:13,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-20 06:03:13,198 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:03:13,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-20 06:03:13,230 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 06:03:13,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-20 06:03:13,261 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 13 treesize of output 9 [2022-07-20 06:03:13,264 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 13 treesize of output 9 [2022-07-20 06:03:13,474 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 [2022-07-20 06:03:13,476 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 17 treesize of output 9 [2022-07-20 06:03:13,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:13,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:03:14,207 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 67 treesize of output 63 [2022-07-20 06:03:14,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:14,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860066058] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:03:14,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:03:14,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 36 [2022-07-20 06:03:14,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137836314] [2022-07-20 06:03:14,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:03:14,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-20 06:03:14,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:14,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-20 06:03:14,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1198, Unknown=0, NotChecked=0, Total=1332 [2022-07-20 06:03:14,300 INFO L87 Difference]: Start difference. First operand 339 states and 378 transitions. Second operand has 37 states, 36 states have (on average 3.5277777777777777) internal successors, (127), 37 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) [2022-07-20 06:03:17,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:17,268 INFO L93 Difference]: Finished difference Result 972 states and 1064 transitions. [2022-07-20 06:03:17,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-20 06:03:17,268 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.5277777777777777) internal successors, (127), 37 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 46 [2022-07-20 06:03:17,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:17,270 INFO L225 Difference]: With dead ends: 972 [2022-07-20 06:03:17,270 INFO L226 Difference]: Without dead ends: 972 [2022-07-20 06:03:17,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 79 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1133, Invalid=4417, Unknown=0, NotChecked=0, Total=5550 [2022-07-20 06:03:17,272 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 4949 mSDsluCounter, 2927 mSDsCounter, 0 mSdLazyCounter, 3569 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4951 SdHoareTripleChecker+Valid, 3117 SdHoareTripleChecker+Invalid, 4569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 3569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 811 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:17,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4951 Valid, 3117 Invalid, 4569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 3569 Invalid, 0 Unknown, 811 Unchecked, 1.6s Time] [2022-07-20 06:03:17,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2022-07-20 06:03:17,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 355. [2022-07-20 06:03:17,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 262 states have (on average 1.465648854961832) internal successors, (384), 352 states have internal predecessors, (384), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:17,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 398 transitions. [2022-07-20 06:03:17,278 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 398 transitions. Word has length 46 [2022-07-20 06:03:17,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:17,279 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 398 transitions. [2022-07-20 06:03:17,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.5277777777777777) internal successors, (127), 37 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) [2022-07-20 06:03:17,279 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 398 transitions. [2022-07-20 06:03:17,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 06:03:17,279 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:17,280 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:17,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-20 06:03:17,497 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,SelfDestructingSolverStorable32 [2022-07-20 06:03:17,497 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:17,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:17,497 INFO L85 PathProgramCache]: Analyzing trace with hash -56370646, now seen corresponding path program 1 times [2022-07-20 06:03:17,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:17,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762813570] [2022-07-20 06:03:17,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:17,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 06:03:17,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:17,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762813570] [2022-07-20 06:03:17,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762813570] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:03:17,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:03:17,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 06:03:17,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364326077] [2022-07-20 06:03:17,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:03:17,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 06:03:17,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:17,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 06:03:17,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:03:17,576 INFO L87 Difference]: Start difference. First operand 355 states and 398 transitions. Second operand has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 8 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) [2022-07-20 06:03:17,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:17,899 INFO L93 Difference]: Finished difference Result 486 states and 539 transitions. [2022-07-20 06:03:17,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 06:03:17,899 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 8 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) Word has length 48 [2022-07-20 06:03:17,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:17,901 INFO L225 Difference]: With dead ends: 486 [2022-07-20 06:03:17,901 INFO L226 Difference]: Without dead ends: 486 [2022-07-20 06:03:17,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-20 06:03:17,902 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 265 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 1198 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:17,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 1198 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 06:03:17,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-07-20 06:03:17,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 358. [2022-07-20 06:03:17,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 267 states have (on average 1.445692883895131) internal successors, (386), 355 states have internal predecessors, (386), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:17,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 400 transitions. [2022-07-20 06:03:17,908 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 400 transitions. Word has length 48 [2022-07-20 06:03:17,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:17,908 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 400 transitions. [2022-07-20 06:03:17,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 8 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) [2022-07-20 06:03:17,908 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 400 transitions. [2022-07-20 06:03:17,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 06:03:17,911 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:17,911 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:17,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-20 06:03:17,911 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr74REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:17,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:17,911 INFO L85 PathProgramCache]: Analyzing trace with hash -56370645, now seen corresponding path program 1 times [2022-07-20 06:03:17,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:17,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026710106] [2022-07-20 06:03:17,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:17,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:17,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:18,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:18,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:18,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026710106] [2022-07-20 06:03:18,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026710106] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:03:18,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:03:18,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-20 06:03:18,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639027501] [2022-07-20 06:03:18,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:03:18,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 06:03:18,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:18,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 06:03:18,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-07-20 06:03:18,016 INFO L87 Difference]: Start difference. First operand 358 states and 400 transitions. Second operand has 11 states, 10 states have (on average 4.8) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:18,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:18,492 INFO L93 Difference]: Finished difference Result 463 states and 505 transitions. [2022-07-20 06:03:18,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 06:03:18,493 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2022-07-20 06:03:18,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:18,494 INFO L225 Difference]: With dead ends: 463 [2022-07-20 06:03:18,494 INFO L226 Difference]: Without dead ends: 463 [2022-07-20 06:03:18,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2022-07-20 06:03:18,494 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 1078 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:18,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1080 Valid, 1221 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 06:03:18,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-07-20 06:03:18,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 361. [2022-07-20 06:03:18,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 270 states have (on average 1.4407407407407407) internal successors, (389), 358 states have internal predecessors, (389), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:18,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 403 transitions. [2022-07-20 06:03:18,502 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 403 transitions. Word has length 48 [2022-07-20 06:03:18,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:18,502 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 403 transitions. [2022-07-20 06:03:18,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:18,502 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 403 transitions. [2022-07-20 06:03:18,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-20 06:03:18,502 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:18,503 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:18,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-20 06:03:18,503 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:18,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:18,503 INFO L85 PathProgramCache]: Analyzing trace with hash -2146523909, now seen corresponding path program 1 times [2022-07-20 06:03:18,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:18,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803665979] [2022-07-20 06:03:18,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:18,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 06:03:18,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:18,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803665979] [2022-07-20 06:03:18,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803665979] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:03:18,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154550246] [2022-07-20 06:03:18,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:18,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:03:18,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:03:18,704 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) [2022-07-20 06:03:18,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 06:03:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:18,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 06:03:18,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:03:18,894 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 19 [2022-07-20 06:03:18,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-20 06:03:18,918 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 06:03:18,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:03:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 06:03:18,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154550246] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:03:18,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:03:18,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 19 [2022-07-20 06:03:18,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367522890] [2022-07-20 06:03:18,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:03:18,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 06:03:18,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:18,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 06:03:18,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-07-20 06:03:18,970 INFO L87 Difference]: Start difference. First operand 361 states and 403 transitions. Second operand has 19 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:19,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:19,339 INFO L93 Difference]: Finished difference Result 359 states and 397 transitions. [2022-07-20 06:03:19,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 06:03:19,340 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-07-20 06:03:19,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:19,341 INFO L225 Difference]: With dead ends: 359 [2022-07-20 06:03:19,341 INFO L226 Difference]: Without dead ends: 359 [2022-07-20 06:03:19,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2022-07-20 06:03:19,341 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 709 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:19,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 644 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 06:03:19,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-07-20 06:03:19,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2022-07-20 06:03:19,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 270 states have (on average 1.4259259259259258) internal successors, (385), 356 states have internal predecessors, (385), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:19,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 397 transitions. [2022-07-20 06:03:19,345 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 397 transitions. Word has length 50 [2022-07-20 06:03:19,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:19,346 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 397 transitions. [2022-07-20 06:03:19,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:19,346 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 397 transitions. [2022-07-20 06:03:19,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-20 06:03:19,346 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:19,346 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:19,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 06:03:19,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:03:19,565 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:19,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:19,565 INFO L85 PathProgramCache]: Analyzing trace with hash -755050628, now seen corresponding path program 1 times [2022-07-20 06:03:19,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:19,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795725621] [2022-07-20 06:03:19,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:19,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:19,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 06:03:19,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:19,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795725621] [2022-07-20 06:03:19,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795725621] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:03:19,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:03:19,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 06:03:19,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291599109] [2022-07-20 06:03:19,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:03:19,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 06:03:19,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:19,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 06:03:19,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:03:19,599 INFO L87 Difference]: Start difference. First operand 359 states and 397 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:19,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:19,684 INFO L93 Difference]: Finished difference Result 358 states and 394 transitions. [2022-07-20 06:03:19,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:03:19,685 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-20 06:03:19,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:19,686 INFO L225 Difference]: With dead ends: 358 [2022-07-20 06:03:19,686 INFO L226 Difference]: Without dead ends: 358 [2022-07-20 06:03:19,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:03:19,686 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 26 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:19,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 823 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:03:19,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-07-20 06:03:19,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2022-07-20 06:03:19,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 270 states have (on average 1.4185185185185185) internal successors, (383), 355 states have internal predecessors, (383), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:19,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 394 transitions. [2022-07-20 06:03:19,692 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 394 transitions. Word has length 53 [2022-07-20 06:03:19,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:19,692 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 394 transitions. [2022-07-20 06:03:19,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:19,692 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 394 transitions. [2022-07-20 06:03:19,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-20 06:03:19,693 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:19,693 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:19,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-20 06:03:19,693 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:19,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:19,694 INFO L85 PathProgramCache]: Analyzing trace with hash -162853312, now seen corresponding path program 1 times [2022-07-20 06:03:19,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:19,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586890952] [2022-07-20 06:03:19,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:19,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:19,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 06:03:19,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:19,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586890952] [2022-07-20 06:03:19,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586890952] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:03:19,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:03:19,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-20 06:03:19,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243503076] [2022-07-20 06:03:19,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:03:19,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 06:03:19,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:19,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 06:03:19,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-20 06:03:19,778 INFO L87 Difference]: Start difference. First operand 358 states and 394 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:20,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:20,086 INFO L93 Difference]: Finished difference Result 474 states and 519 transitions. [2022-07-20 06:03:20,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 06:03:20,086 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 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 52 [2022-07-20 06:03:20,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:20,088 INFO L225 Difference]: With dead ends: 474 [2022-07-20 06:03:20,088 INFO L226 Difference]: Without dead ends: 474 [2022-07-20 06:03:20,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-07-20 06:03:20,088 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 255 mSDsluCounter, 1546 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1760 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:20,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 1760 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:03:20,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-07-20 06:03:20,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 357. [2022-07-20 06:03:20,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 269 states have (on average 1.41635687732342) internal successors, (381), 354 states have internal predecessors, (381), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:20,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 392 transitions. [2022-07-20 06:03:20,093 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 392 transitions. Word has length 52 [2022-07-20 06:03:20,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:20,093 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 392 transitions. [2022-07-20 06:03:20,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:20,093 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 392 transitions. [2022-07-20 06:03:20,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-20 06:03:20,093 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:20,093 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:20,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-20 06:03:20,093 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:20,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:20,094 INFO L85 PathProgramCache]: Analyzing trace with hash 914566065, now seen corresponding path program 2 times [2022-07-20 06:03:20,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:20,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265368256] [2022-07-20 06:03:20,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:20,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:20,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 06:03:20,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:20,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265368256] [2022-07-20 06:03:20,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265368256] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:03:20,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791016401] [2022-07-20 06:03:20,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 06:03:20,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:03:20,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:03:20,234 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) [2022-07-20 06:03:20,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 06:03:20,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-20 06:03:20,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:03:20,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-20 06:03:20,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:03:20,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:03:20,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:03:20,464 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 06:03:20,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:03:20,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791016401] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:03:20,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 06:03:20,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-07-20 06:03:20,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281495646] [2022-07-20 06:03:20,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:03:20,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 06:03:20,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:20,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 06:03:20,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-07-20 06:03:20,465 INFO L87 Difference]: Start difference. First operand 357 states and 392 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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) [2022-07-20 06:03:20,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:20,687 INFO L93 Difference]: Finished difference Result 446 states and 486 transitions. [2022-07-20 06:03:20,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 06:03:20,687 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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) Word has length 52 [2022-07-20 06:03:20,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:20,689 INFO L225 Difference]: With dead ends: 446 [2022-07-20 06:03:20,689 INFO L226 Difference]: Without dead ends: 446 [2022-07-20 06:03:20,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-07-20 06:03:20,689 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 184 mSDsluCounter, 1244 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1495 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:20,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1495 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:03:20,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-07-20 06:03:20,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 361. [2022-07-20 06:03:20,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 273 states have (on average 1.4102564102564104) internal successors, (385), 358 states have internal predecessors, (385), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:20,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 396 transitions. [2022-07-20 06:03:20,695 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 396 transitions. Word has length 52 [2022-07-20 06:03:20,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:20,695 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 396 transitions. [2022-07-20 06:03:20,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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) [2022-07-20 06:03:20,695 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 396 transitions. [2022-07-20 06:03:20,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-20 06:03:20,695 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:20,696 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:20,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 06:03:20,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:03:20,905 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:20,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:20,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1612035677, now seen corresponding path program 1 times [2022-07-20 06:03:20,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:20,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823573756] [2022-07-20 06:03:20,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:20,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:20,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 06:03:20,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:20,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823573756] [2022-07-20 06:03:20,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823573756] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:03:20,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:03:20,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 06:03:20,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919709589] [2022-07-20 06:03:20,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:03:20,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 06:03:20,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:20,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 06:03:20,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:03:20,959 INFO L87 Difference]: Start difference. First operand 361 states and 396 transitions. Second operand has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:21,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:21,295 INFO L93 Difference]: Finished difference Result 538 states and 590 transitions. [2022-07-20 06:03:21,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 06:03:21,296 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 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 55 [2022-07-20 06:03:21,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:21,297 INFO L225 Difference]: With dead ends: 538 [2022-07-20 06:03:21,297 INFO L226 Difference]: Without dead ends: 538 [2022-07-20 06:03:21,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2022-07-20 06:03:21,298 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 713 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:21,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [715 Valid, 781 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 06:03:21,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-07-20 06:03:21,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 364. [2022-07-20 06:03:21,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 276 states have (on average 1.4094202898550725) internal successors, (389), 361 states have internal predecessors, (389), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:21,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 400 transitions. [2022-07-20 06:03:21,303 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 400 transitions. Word has length 55 [2022-07-20 06:03:21,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:21,303 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 400 transitions. [2022-07-20 06:03:21,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:21,303 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 400 transitions. [2022-07-20 06:03:21,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-20 06:03:21,304 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:21,304 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:21,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-20 06:03:21,304 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:21,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:21,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1612035676, now seen corresponding path program 1 times [2022-07-20 06:03:21,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:21,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063799881] [2022-07-20 06:03:21,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:21,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:21,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:21,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 06:03:21,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:21,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063799881] [2022-07-20 06:03:21,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063799881] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:03:21,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:03:21,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 06:03:21,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981111857] [2022-07-20 06:03:21,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:03:21,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 06:03:21,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:21,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 06:03:21,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:03:21,374 INFO L87 Difference]: Start difference. First operand 364 states and 400 transitions. Second operand has 7 states, 6 states have (on average 8.166666666666666) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:21,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:21,711 INFO L93 Difference]: Finished difference Result 585 states and 637 transitions. [2022-07-20 06:03:21,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 06:03:21,711 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.166666666666666) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 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 55 [2022-07-20 06:03:21,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:21,713 INFO L225 Difference]: With dead ends: 585 [2022-07-20 06:03:21,713 INFO L226 Difference]: Without dead ends: 585 [2022-07-20 06:03:21,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-07-20 06:03:21,713 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 604 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:21,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 887 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 06:03:21,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-07-20 06:03:21,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 381. [2022-07-20 06:03:21,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 293 states have (on average 1.4129692832764504) internal successors, (414), 378 states have internal predecessors, (414), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:21,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 425 transitions. [2022-07-20 06:03:21,718 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 425 transitions. Word has length 55 [2022-07-20 06:03:21,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:21,718 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 425 transitions. [2022-07-20 06:03:21,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.166666666666666) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:21,718 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 425 transitions. [2022-07-20 06:03:21,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-20 06:03:21,719 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:21,719 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:21,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-20 06:03:21,719 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:21,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:21,719 INFO L85 PathProgramCache]: Analyzing trace with hash 874630922, now seen corresponding path program 1 times [2022-07-20 06:03:21,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:21,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990632768] [2022-07-20 06:03:21,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:21,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:21,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:22,095 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:22,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:22,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990632768] [2022-07-20 06:03:22,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990632768] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:03:22,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855166297] [2022-07-20 06:03:22,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:22,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:03:22,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:03:22,098 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) [2022-07-20 06:03:22,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 06:03:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:22,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-20 06:03:22,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:03:22,264 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 [2022-07-20 06:03:22,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 06:03:22,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:03:22,321 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 [2022-07-20 06:03:22,342 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 06:03:22,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 06:03:22,372 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 15 treesize of output 17 [2022-07-20 06:03:22,384 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 15 treesize of output 17 [2022-07-20 06:03:22,420 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-20 06:03:22,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 06:03:22,448 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 15 treesize of output 17 [2022-07-20 06:03:22,455 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 [2022-07-20 06:03:22,459 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 13 treesize of output 9 [2022-07-20 06:03:22,612 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 [2022-07-20 06:03:22,717 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:03:22,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2022-07-20 06:03:22,720 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:22,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:03:22,932 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:03:22,933 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-07-20 06:03:22,980 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~item~0#1.base_20| Int) (v_arrayElimArr_1 (Array Int Int))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~item~0#1.base_20| v_arrayElimArr_1) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) 0)) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~item~0#1.base_20|) 0)) (not (= (select v_arrayElimArr_1 4) |c_ULTIMATE.start_main_~data~0#1.base|)))) is different from false [2022-07-20 06:03:23,210 INFO L356 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-07-20 06:03:23,210 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2022-07-20 06:03:23,218 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:03:23,218 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 79 treesize of output 73 [2022-07-20 06:03:23,227 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:03:23,228 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 71 treesize of output 61 [2022-07-20 06:03:23,234 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 48 treesize of output 46 [2022-07-20 06:03:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-07-20 06:03:23,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855166297] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:03:23,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:03:23,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 18] total 42 [2022-07-20 06:03:23,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66352396] [2022-07-20 06:03:23,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:03:23,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-20 06:03:23,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:23,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-20 06:03:23,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1488, Unknown=31, NotChecked=78, Total=1722 [2022-07-20 06:03:23,355 INFO L87 Difference]: Start difference. First operand 381 states and 425 transitions. Second operand has 42 states, 42 states have (on average 3.2857142857142856) internal successors, (138), 42 states have internal predecessors, (138), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:25,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:25,151 INFO L93 Difference]: Finished difference Result 621 states and 695 transitions. [2022-07-20 06:03:25,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-20 06:03:25,155 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.2857142857142856) internal successors, (138), 42 states have internal predecessors, (138), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-07-20 06:03:25,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:25,157 INFO L225 Difference]: With dead ends: 621 [2022-07-20 06:03:25,157 INFO L226 Difference]: Without dead ends: 621 [2022-07-20 06:03:25,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=562, Invalid=2951, Unknown=31, NotChecked=116, Total=3660 [2022-07-20 06:03:25,158 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 1409 mSDsluCounter, 4929 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1411 SdHoareTripleChecker+Valid, 5178 SdHoareTripleChecker+Invalid, 3163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1599 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:25,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1411 Valid, 5178 Invalid, 3163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1469 Invalid, 0 Unknown, 1599 Unchecked, 0.7s Time] [2022-07-20 06:03:25,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-07-20 06:03:25,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 381. [2022-07-20 06:03:25,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 293 states have (on average 1.4095563139931742) internal successors, (413), 378 states have internal predecessors, (413), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:25,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 424 transitions. [2022-07-20 06:03:25,162 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 424 transitions. Word has length 56 [2022-07-20 06:03:25,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:25,162 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 424 transitions. [2022-07-20 06:03:25,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.2857142857142856) internal successors, (138), 42 states have internal predecessors, (138), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:25,163 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 424 transitions. [2022-07-20 06:03:25,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-20 06:03:25,163 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:25,163 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:25,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 06:03:25,380 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,SelfDestructingSolverStorable41 [2022-07-20 06:03:25,381 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:25,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:25,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1551686691, now seen corresponding path program 1 times [2022-07-20 06:03:25,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:25,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801518112] [2022-07-20 06:03:25,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:25,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:25,778 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:25,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:25,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801518112] [2022-07-20 06:03:25,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801518112] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:03:25,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014159090] [2022-07-20 06:03:25,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:25,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:03:25,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:03:25,781 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) [2022-07-20 06:03:25,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 06:03:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:25,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-20 06:03:25,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:03:25,952 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 [2022-07-20 06:03:25,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 06:03:25,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:03:25,989 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 [2022-07-20 06:03:26,014 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 06:03:26,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 06:03:26,053 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 15 treesize of output 17 [2022-07-20 06:03:26,071 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 15 treesize of output 17 [2022-07-20 06:03:26,111 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-20 06:03:26,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 06:03:26,148 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 15 treesize of output 17 [2022-07-20 06:03:26,156 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 13 treesize of output 9 [2022-07-20 06:03:26,159 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 [2022-07-20 06:03:26,337 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 [2022-07-20 06:03:26,443 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:03:26,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2022-07-20 06:03:26,446 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:26,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:03:26,646 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:03:26,647 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-07-20 06:03:26,705 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~item~0#1.base_22| Int) (v_arrayElimArr_3 (Array Int Int))) (or (not (= (select v_arrayElimArr_3 4) |c_ULTIMATE.start_main_~data~0#1.base|)) (not (= (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~item~0#1.base_22| v_arrayElimArr_3) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) 0)) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~item~0#1.base_22|) 0)))) is different from false [2022-07-20 06:03:26,943 INFO L356 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-07-20 06:03:26,944 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2022-07-20 06:03:26,952 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:03:26,952 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 79 treesize of output 73 [2022-07-20 06:03:26,956 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 64 treesize of output 62 [2022-07-20 06:03:26,963 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:03:26,963 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 69 treesize of output 59 [2022-07-20 06:03:27,075 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-07-20 06:03:27,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014159090] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:03:27,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:03:27,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 18] total 42 [2022-07-20 06:03:27,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254474627] [2022-07-20 06:03:27,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:03:27,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-20 06:03:27,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:27,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-20 06:03:27,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1496, Unknown=23, NotChecked=78, Total=1722 [2022-07-20 06:03:27,076 INFO L87 Difference]: Start difference. First operand 381 states and 424 transitions. Second operand has 42 states, 42 states have (on average 3.2857142857142856) internal successors, (138), 42 states have internal predecessors, (138), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:29,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:29,017 INFO L93 Difference]: Finished difference Result 731 states and 819 transitions. [2022-07-20 06:03:29,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-20 06:03:29,017 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.2857142857142856) internal successors, (138), 42 states have internal predecessors, (138), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-07-20 06:03:29,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:29,019 INFO L225 Difference]: With dead ends: 731 [2022-07-20 06:03:29,019 INFO L226 Difference]: Without dead ends: 731 [2022-07-20 06:03:29,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=524, Invalid=2763, Unknown=23, NotChecked=112, Total=3422 [2022-07-20 06:03:29,020 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 1570 mSDsluCounter, 5523 mSDsCounter, 0 mSdLazyCounter, 2024 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1572 SdHoareTripleChecker+Valid, 5743 SdHoareTripleChecker+Invalid, 3434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1312 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:29,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1572 Valid, 5743 Invalid, 3434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2024 Invalid, 0 Unknown, 1312 Unchecked, 0.9s Time] [2022-07-20 06:03:29,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-07-20 06:03:29,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 381. [2022-07-20 06:03:29,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 293 states have (on average 1.4061433447098977) internal successors, (412), 378 states have internal predecessors, (412), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:29,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 423 transitions. [2022-07-20 06:03:29,026 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 423 transitions. Word has length 56 [2022-07-20 06:03:29,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:29,026 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 423 transitions. [2022-07-20 06:03:29,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.2857142857142856) internal successors, (138), 42 states have internal predecessors, (138), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:29,026 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 423 transitions. [2022-07-20 06:03:29,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-20 06:03:29,027 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:29,027 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:29,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 06:03:29,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:03:29,244 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr82ASSERT_VIOLATIONMEMORY_FREE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:29,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:29,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1125924296, now seen corresponding path program 1 times [2022-07-20 06:03:29,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:29,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728327570] [2022-07-20 06:03:29,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:29,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:29,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:29,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:29,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728327570] [2022-07-20 06:03:29,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728327570] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:03:29,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:03:29,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 06:03:29,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868751246] [2022-07-20 06:03:29,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:03:29,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 06:03:29,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:29,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 06:03:29,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 06:03:29,297 INFO L87 Difference]: Start difference. First operand 381 states and 423 transitions. Second operand has 4 states, 3 states have (on average 19.0) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:29,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:29,350 INFO L93 Difference]: Finished difference Result 491 states and 544 transitions. [2022-07-20 06:03:29,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 06:03:29,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 19.0) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2022-07-20 06:03:29,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:29,352 INFO L225 Difference]: With dead ends: 491 [2022-07-20 06:03:29,352 INFO L226 Difference]: Without dead ends: 491 [2022-07-20 06:03:29,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:03:29,352 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 380 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:29,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 495 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:03:29,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-07-20 06:03:29,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 394. [2022-07-20 06:03:29,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 306 states have (on average 1.4052287581699345) internal successors, (430), 391 states have internal predecessors, (430), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:29,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 441 transitions. [2022-07-20 06:03:29,357 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 441 transitions. Word has length 57 [2022-07-20 06:03:29,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:29,357 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 441 transitions. [2022-07-20 06:03:29,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 19.0) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:03:29,357 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 441 transitions. [2022-07-20 06:03:29,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-20 06:03:29,357 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:29,357 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:29,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-07-20 06:03:29,357 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:29,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:29,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1343539666, now seen corresponding path program 1 times [2022-07-20 06:03:29,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:29,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540591076] [2022-07-20 06:03:29,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:29,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:29,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:29,845 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:29,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:29,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540591076] [2022-07-20 06:03:29,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540591076] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:03:29,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636252733] [2022-07-20 06:03:29,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:29,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:03:29,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:03:29,847 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) [2022-07-20 06:03:29,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 06:03:30,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:30,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-20 06:03:30,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:03:30,026 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 [2022-07-20 06:03:30,051 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 06:03:30,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 06:03:30,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 06:03:30,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:03:30,114 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 31 treesize of output 26 [2022-07-20 06:03:30,170 INFO L356 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2022-07-20 06:03:30,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2022-07-20 06:03:30,220 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 32 treesize of output 30 [2022-07-20 06:03:30,238 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 32 treesize of output 30 [2022-07-20 06:03:30,264 INFO L356 Elim1Store]: treesize reduction 38, result has 48.6 percent of original size [2022-07-20 06:03:30,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 50 [2022-07-20 06:03:30,340 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-07-20 06:03:30,341 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 1 case distinctions, treesize of input 45 treesize of output 36 [2022-07-20 06:03:30,434 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 13 treesize of output 9 [2022-07-20 06:03:30,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:03:30,440 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 06:03:30,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 73 [2022-07-20 06:03:31,200 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 [2022-07-20 06:03:31,840 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:03:31,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 118 treesize of output 61 [2022-07-20 06:03:31,953 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:31,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:03:34,271 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~item~0#1.base_24| Int)) (= (select (store |c_#valid| |v_ULTIMATE.start_main_~item~0#1.base_24| 1) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~item~0#1.base_24| (store (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~item~0#1.base_24|) 0 |c_ULTIMATE.start_main_~node~1#1.base|) 4 |c_ULTIMATE.start_main_~data~0#1.base|)) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|)) 1)) is different from false [2022-07-20 06:03:34,283 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1895 (Array Int Int)) (|v_ULTIMATE.start_main_~item~0#1.base_24| Int)) (= (select (store |c_#valid| |v_ULTIMATE.start_main_~item~0#1.base_24| 1) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_1895))) (store .cse0 |v_ULTIMATE.start_main_~item~0#1.base_24| (store (store (select .cse0 |v_ULTIMATE.start_main_~item~0#1.base_24|) 0 |c_ULTIMATE.start_main_~node~1#1.base|) 4 |c_ULTIMATE.start_main_~data~0#1.base|))) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|)) 1)) is different from false [2022-07-20 06:03:34,299 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1895 (Array Int Int)) (|v_ULTIMATE.start_main_~item~0#1.base_24| Int) (|v_ULTIMATE.start_main_~node~1#1.base_22| Int)) (or (= (select (store (store |c_#valid| |v_ULTIMATE.start_main_~node~1#1.base_22| 1) |v_ULTIMATE.start_main_~item~0#1.base_24| 1) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~node~1#1.base_22| v_ArrVal_1895))) (store .cse0 |v_ULTIMATE.start_main_~item~0#1.base_24| (store (store (select .cse0 |v_ULTIMATE.start_main_~item~0#1.base_24|) 0 |v_ULTIMATE.start_main_~node~1#1.base_22|) 4 |c_ULTIMATE.start_main_~data~0#1.base|))) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|)) 1) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~node~1#1.base_22|) 0)))) is different from false [2022-07-20 06:03:34,313 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1895 (Array Int Int)) (|v_ULTIMATE.start_main_~item~0#1.base_24| Int) (|v_ULTIMATE.start_main_~node~1#1.base_22| Int)) (or (= (select (store (store |c_#valid| |v_ULTIMATE.start_main_~node~1#1.base_22| 1) |v_ULTIMATE.start_main_~item~0#1.base_24| 1) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~node~1#1.base_22| v_ArrVal_1895))) (store .cse0 |v_ULTIMATE.start_main_~item~0#1.base_24| (store (store (select .cse0 |v_ULTIMATE.start_main_~item~0#1.base_24|) 0 |v_ULTIMATE.start_main_~node~1#1.base_22|) 4 |c_ULTIMATE.start_main_~item~0#1.base|))) |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|)) 1) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~node~1#1.base_22|) 0)))) is different from false [2022-07-20 06:03:34,382 INFO L356 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-07-20 06:03:34,382 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 51 [2022-07-20 06:03:34,390 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:03:34,390 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 320 treesize of output 316 [2022-07-20 06:03:34,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 530 treesize of output 516 [2022-07-20 06:03:34,421 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 378 treesize of output 370 [2022-07-20 06:03:34,472 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 551 treesize of output 541 [2022-07-20 06:03:37,427 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-07-20 06:03:37,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636252733] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:03:37,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:03:37,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 18] total 49 [2022-07-20 06:03:37,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017023195] [2022-07-20 06:03:37,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:03:37,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-20 06:03:37,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:03:37,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-20 06:03:37,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1919, Unknown=4, NotChecked=364, Total=2450 [2022-07-20 06:03:37,429 INFO L87 Difference]: Start difference. First operand 394 states and 441 transitions. Second operand has 50 states, 49 states have (on average 3.1020408163265305) internal successors, (152), 50 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) [2022-07-20 06:03:40,220 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse5 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|))) (let ((.cse1 (= |c_ULTIMATE.start_main_~node~1#1.base| |c_ULTIMATE.start_main_~item~0#1.base|)) (.cse2 (= (select |c_#valid| |c_ULTIMATE.start_main_~node~1#1.base|) 1)) (.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|)) (.cse3 (= (select |c_#valid| |c_ULTIMATE.start_main_~data~0#1.base|) 1)) (.cse4 (= (select |c_#valid| .cse5) 1))) (and (forall ((|v_ULTIMATE.start_main_~item~0#1.base_24| Int)) (= (select (store |c_#valid| |v_ULTIMATE.start_main_~item~0#1.base_24| 1) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~item~0#1.base_24| (store (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~item~0#1.base_24|) 0 |c_ULTIMATE.start_main_~node~1#1.base|) 4 |c_ULTIMATE.start_main_~data~0#1.base|)) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|)) 1)) (= (select |c_#valid| .cse0) 1) (= |c_ULTIMATE.start_main_~node~1#1.offset| 0) (not (= |c_ULTIMATE.start_main_~node~1#1.base| |c_ULTIMATE.start_main_~data~0#1.base|)) (= |c_ULTIMATE.start_main_~data~0#1.offset| 0) (not .cse1) .cse2 (or (= |c_ULTIMATE.start_main_~item~0#1.base| |c_ULTIMATE.start_main_~data~0#1.base|) .cse3) (= |c_ULTIMATE.start_main_~item~0#1.offset| 0) (= (select |c_#valid| |c_ULTIMATE.start_main_~item~0#1.base|) 1) (or .cse1 .cse2) .cse4 (not (= .cse0 |c_ULTIMATE.start_main_~item~0#1.base|)) .cse3 (not (= .cse5 |c_ULTIMATE.start_main_~data~0#1.base|)) (not (= .cse5 |c_ULTIMATE.start_main_~node~1#1.base|)) (or (= .cse5 |c_ULTIMATE.start_main_~item~0#1.base|) .cse4)))) is different from false [2022-07-20 06:03:42,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:03:42,365 INFO L93 Difference]: Finished difference Result 732 states and 826 transitions. [2022-07-20 06:03:42,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-20 06:03:42,367 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 3.1020408163265305) internal successors, (152), 50 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 57 [2022-07-20 06:03:42,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:03:42,369 INFO L225 Difference]: With dead ends: 732 [2022-07-20 06:03:42,369 INFO L226 Difference]: Without dead ends: 732 [2022-07-20 06:03:42,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=496, Invalid=3281, Unknown=25, NotChecked=620, Total=4422 [2022-07-20 06:03:42,370 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 1179 mSDsluCounter, 4072 mSDsCounter, 0 mSdLazyCounter, 2378 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1183 SdHoareTripleChecker+Valid, 4256 SdHoareTripleChecker+Invalid, 4001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1562 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:03:42,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1183 Valid, 4256 Invalid, 4001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2378 Invalid, 0 Unknown, 1562 Unchecked, 1.1s Time] [2022-07-20 06:03:42,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-07-20 06:03:42,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 395. [2022-07-20 06:03:42,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 307 states have (on average 1.4071661237785016) internal successors, (432), 392 states have internal predecessors, (432), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:03:42,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 443 transitions. [2022-07-20 06:03:42,377 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 443 transitions. Word has length 57 [2022-07-20 06:03:42,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:03:42,377 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 443 transitions. [2022-07-20 06:03:42,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 3.1020408163265305) internal successors, (152), 50 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) [2022-07-20 06:03:42,378 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 443 transitions. [2022-07-20 06:03:42,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-20 06:03:42,378 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:03:42,378 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:03:42,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 06:03:42,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-20 06:03:42,579 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:03:42,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:03:42,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1343539667, now seen corresponding path program 1 times [2022-07-20 06:03:42,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:03:42,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331014905] [2022-07-20 06:03:42,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:42,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:03:42,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:43,118 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:43,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:03:43,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331014905] [2022-07-20 06:03:43,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331014905] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:03:43,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693663084] [2022-07-20 06:03:43,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:03:43,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:03:43,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:03:43,121 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) [2022-07-20 06:03:43,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 06:03:43,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:03:43,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-20 06:03:43,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:03:43,280 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 [2022-07-20 06:03:43,348 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 06:03:43,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-20 06:03:43,362 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 06:03:43,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 06:03:43,415 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 11 treesize of output 7 [2022-07-20 06:03:43,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 06:03:43,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:03:43,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-20 06:03:43,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:03:43,456 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 40 treesize of output 31 [2022-07-20 06:03:43,512 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-07-20 06:03:43,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2022-07-20 06:03:43,538 INFO L356 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2022-07-20 06:03:43,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2022-07-20 06:03:43,601 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 41 treesize of output 37 [2022-07-20 06:03:43,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-20 06:03:43,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-20 06:03:43,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2022-07-20 06:03:43,658 INFO L356 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-07-20 06:03:43,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-07-20 06:03:43,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 06:03:43,715 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 32 treesize of output 30 [2022-07-20 06:03:43,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-20 06:03:43,737 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 37 treesize of output 28 [2022-07-20 06:03:43,740 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 23 treesize of output 22 [2022-07-20 06:03:44,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:03:44,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:03:44,532 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-20 06:03:44,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 50 [2022-07-20 06:03:44,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:03:44,540 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-20 06:03:44,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2022-07-20 06:03:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:03:44,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:03:49,715 INFO L356 Elim1Store]: treesize reduction 20, result has 52.4 percent of original size [2022-07-20 06:03:49,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 124 treesize of output 127 [2022-07-20 06:03:49,733 INFO L356 Elim1Store]: treesize reduction 20, result has 52.4 percent of original size [2022-07-20 06:03:49,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 174 treesize of output 159 [2022-07-20 06:03:49,882 INFO L356 Elim1Store]: treesize reduction 20, result has 52.4 percent of original size [2022-07-20 06:03:49,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 77 [2022-07-20 06:03:49,887 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 102 treesize of output 94 [2022-07-20 06:03:52,370 INFO L356 Elim1Store]: treesize reduction 20, result has 52.4 percent of original size [2022-07-20 06:03:52,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 124 treesize of output 127 [2022-07-20 06:03:52,387 INFO L356 Elim1Store]: treesize reduction 20, result has 52.4 percent of original size [2022-07-20 06:03:52,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 174 treesize of output 159 [2022-07-20 06:03:52,464 INFO L356 Elim1Store]: treesize reduction 20, result has 52.4 percent of original size [2022-07-20 06:03:52,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 77 [2022-07-20 06:03:52,468 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 102 treesize of output 94 [2022-07-20 06:03:52,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:03:52,736 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:03:52,737 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 48 [2022-07-20 06:03:52,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:03:52,743 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:03:52,744 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-07-20 06:03:52,772 INFO L356 Elim1Store]: treesize reduction 16, result has 55.6 percent of original size [2022-07-20 06:03:52,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 67 [2022-07-20 06:03:52,776 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 90 treesize of output 82 [2022-07-20 06:03:52,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:03:52,879 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:03:52,879 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 48 [2022-07-20 06:03:52,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:03:52,886 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:03:52,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-07-20 06:03:52,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:03:52,898 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:03:52,899 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-07-20 06:03:52,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:03:52,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:03:52,938 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:03:52,938 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-07-20 06:03:52,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:03:52,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:03:52,952 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:03:52,952 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 48 [2022-07-20 06:03:52,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:03:52,959 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:03:52,959 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-07-20 06:03:52,989 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2032 Int) (|v_ULTIMATE.start_main_~item~0#1.base_26| Int) (v_arrayElimArr_19 (Array Int Int)) (v_arrayElimArr_20 (Array Int Int))) (or (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~item~0#1.base_26| v_arrayElimArr_20) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) 4) (select (store |c_#length| |v_ULTIMATE.start_main_~item~0#1.base_26| v_ArrVal_2032) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~item~0#1.base_26| v_arrayElimArr_19) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|))) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~item~0#1.base_26|) 0)) (not (<= v_ArrVal_2032 8)) (not (= |c_ULTIMATE.start_main_~data~0#1.offset| (select v_arrayElimArr_20 4))) (< v_ArrVal_2032 8) (not (= (select v_arrayElimArr_19 4) |c_ULTIMATE.start_main_~data~0#1.base|)))) (forall ((|v_ULTIMATE.start_main_~item~0#1.base_26| Int) (v_arrayElimArr_18 (Array Int Int))) (or (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~item~0#1.base_26| v_arrayElimArr_18) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|)) (not (= (select v_arrayElimArr_18 4) |c_ULTIMATE.start_main_~data~0#1.offset|)) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~item~0#1.base_26|) 0))))) is different from false [2022-07-20 06:03:53,233 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~node~1#1.base_24| Int) (v_ArrVal_2027 Int) (v_ArrVal_2026 Int)) (or (and (forall ((|v_ULTIMATE.start_main_~item~0#1.base_26| Int) (v_arrayElimArr_18 (Array Int Int)) (v_ArrVal_2030 (Array Int Int))) (or (not (= (select v_arrayElimArr_18 4) |c_ULTIMATE.start_main_~data~0#1.offset|)) (<= 0 (select (select (store (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~node~1#1.base_24| v_ArrVal_2030) |v_ULTIMATE.start_main_~item~0#1.base_26| v_arrayElimArr_18) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|)) (not (= (select (store |c_#valid| |v_ULTIMATE.start_main_~node~1#1.base_24| v_ArrVal_2027) |v_ULTIMATE.start_main_~item~0#1.base_26|) 0)))) (forall ((v_ArrVal_2032 Int) (|v_ULTIMATE.start_main_~item~0#1.base_26| Int) (v_arrayElimArr_19 (Array Int Int)) (v_ArrVal_2031 (Array Int Int)) (v_ArrVal_2030 (Array Int Int)) (v_arrayElimArr_20 (Array Int Int))) (or (not (<= v_ArrVal_2032 8)) (not (= |c_ULTIMATE.start_main_~data~0#1.offset| (select v_arrayElimArr_20 4))) (not (= (select (store |c_#valid| |v_ULTIMATE.start_main_~node~1#1.base_24| v_ArrVal_2027) |v_ULTIMATE.start_main_~item~0#1.base_26|) 0)) (< v_ArrVal_2032 8) (not (= (select v_arrayElimArr_19 4) |c_ULTIMATE.start_main_~data~0#1.base|)) (<= (+ (select (select (store (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~node~1#1.base_24| v_ArrVal_2030) |v_ULTIMATE.start_main_~item~0#1.base_26| v_arrayElimArr_20) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) 4) (select (store (store |c_#length| |v_ULTIMATE.start_main_~node~1#1.base_24| v_ArrVal_2026) |v_ULTIMATE.start_main_~item~0#1.base_26| v_ArrVal_2032) (select (select (store (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~node~1#1.base_24| v_ArrVal_2031) |v_ULTIMATE.start_main_~item~0#1.base_26| v_arrayElimArr_19) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|)))))) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~node~1#1.base_24|) 0)))) is different from false [2022-07-20 06:03:53,390 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~node~1#1.base_24| Int)) (or (and (forall ((v_ArrVal_2032 Int) (v_ArrVal_2027 Int) (|v_ULTIMATE.start_main_~item~0#1.base_26| Int) (v_arrayElimArr_19 (Array Int Int)) (v_ArrVal_2026 Int) (v_ArrVal_2031 (Array Int Int)) (v_ArrVal_2030 (Array Int Int)) (v_arrayElimArr_20 (Array Int Int))) (or (not (= (select v_arrayElimArr_19 4) |c_ULTIMATE.start_main_~item~0#1.base|)) (not (<= v_ArrVal_2032 8)) (not (= |c_ULTIMATE.start_main_~item~0#1.offset| (select v_arrayElimArr_20 4))) (not (= (select (store |c_#valid| |v_ULTIMATE.start_main_~node~1#1.base_24| v_ArrVal_2027) |v_ULTIMATE.start_main_~item~0#1.base_26|) 0)) (< v_ArrVal_2032 8) (<= (+ (select (select (store (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~node~1#1.base_24| v_ArrVal_2030) |v_ULTIMATE.start_main_~item~0#1.base_26| v_arrayElimArr_20) |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) 4) (select (store (store |c_#length| |v_ULTIMATE.start_main_~node~1#1.base_24| v_ArrVal_2026) |v_ULTIMATE.start_main_~item~0#1.base_26| v_ArrVal_2032) (select (select (store (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~node~1#1.base_24| v_ArrVal_2031) |v_ULTIMATE.start_main_~item~0#1.base_26| v_arrayElimArr_19) |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))))) (forall ((v_ArrVal_2027 Int) (|v_ULTIMATE.start_main_~item~0#1.base_26| Int) (v_arrayElimArr_18 (Array Int Int)) (v_ArrVal_2030 (Array Int Int))) (or (not (= |c_ULTIMATE.start_main_~item~0#1.offset| (select v_arrayElimArr_18 4))) (<= 0 (select (select (store (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~node~1#1.base_24| v_ArrVal_2030) |v_ULTIMATE.start_main_~item~0#1.base_26| v_arrayElimArr_18) |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|)) (not (= (select (store |c_#valid| |v_ULTIMATE.start_main_~node~1#1.base_24| v_ArrVal_2027) |v_ULTIMATE.start_main_~item~0#1.base_26|) 0))))) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~node~1#1.base_24|) 0)))) is different from false [2022-07-20 06:03:53,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:03:53,599 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:03:53,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2022-07-20 06:03:53,602 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 122 treesize of output 110 [2022-07-20 06:03:53,608 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:03:53,609 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 112 treesize of output 110 [2022-07-20 06:03:53,612 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 98 treesize of output 94 [2022-07-20 06:03:53,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:03:53,691 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:03:53,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 65 [2022-07-20 06:03:53,697 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 386 treesize of output 374 [2022-07-20 06:03:53,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:03:53,708 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:03:53,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 370 treesize of output 284 [2022-07-20 06:03:53,715 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 862 treesize of output 826 [2022-07-20 06:03:53,729 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:03:53,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 828 treesize of output 802 [2022-07-20 06:03:53,743 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:03:53,743 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 796 treesize of output 770 [2022-07-20 06:03:53,752 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 758 treesize of output 742 [2022-07-20 06:03:53,763 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 742 treesize of output 726 [2022-07-20 06:04:17,086 WARN L233 SmtUtils]: Spent 14.17s on a formula simplification. DAG size of input: 115 DAG size of output: 106 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-20 06:04:27,311 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:04:27,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 3433 treesize of output 3403 [2022-07-20 06:04:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-07-20 06:04:32,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693663084] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:04:32,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:04:32,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 19] total 52 [2022-07-20 06:04:32,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813866757] [2022-07-20 06:04:32,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:04:32,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-20 06:04:32,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:04:32,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-20 06:04:32,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2253, Unknown=42, NotChecked=294, Total=2756 [2022-07-20 06:04:32,975 INFO L87 Difference]: Start difference. First operand 395 states and 443 transitions. Second operand has 53 states, 52 states have (on average 3.173076923076923) internal successors, (165), 53 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:05:27,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:05:27,921 INFO L93 Difference]: Finished difference Result 723 states and 810 transitions. [2022-07-20 06:05:27,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-20 06:05:27,922 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 3.173076923076923) internal successors, (165), 53 states have internal predecessors, (165), 0 states have call successors, (0), 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 57 [2022-07-20 06:05:27,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:05:27,923 INFO L225 Difference]: With dead ends: 723 [2022-07-20 06:05:27,923 INFO L226 Difference]: Without dead ends: 723 [2022-07-20 06:05:27,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 85 SyntacticMatches, 16 SemanticMatches, 74 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 79.3s TimeCoverageRelationStatistics Valid=833, Invalid=4386, Unknown=49, NotChecked=432, Total=5700 [2022-07-20 06:05:27,925 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 2301 mSDsluCounter, 4915 mSDsCounter, 0 mSdLazyCounter, 3462 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2301 SdHoareTripleChecker+Valid, 5100 SdHoareTripleChecker+Invalid, 7137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 3462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3542 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-20 06:05:27,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2301 Valid, 5100 Invalid, 7137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 3462 Invalid, 0 Unknown, 3542 Unchecked, 1.7s Time] [2022-07-20 06:05:27,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-07-20 06:05:27,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 395. [2022-07-20 06:05:27,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 307 states have (on average 1.4039087947882736) internal successors, (431), 392 states have internal predecessors, (431), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:05:27,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 442 transitions. [2022-07-20 06:05:27,930 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 442 transitions. Word has length 57 [2022-07-20 06:05:27,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:05:27,930 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 442 transitions. [2022-07-20 06:05:27,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 3.173076923076923) internal successors, (165), 53 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:05:27,930 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 442 transitions. [2022-07-20 06:05:27,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-20 06:05:27,931 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:05:27,931 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:05:27,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-20 06:05:28,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-20 06:05:28,147 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:05:28,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:05:28,148 INFO L85 PathProgramCache]: Analyzing trace with hash -857937036, now seen corresponding path program 1 times [2022-07-20 06:05:28,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:05:28,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680048569] [2022-07-20 06:05:28,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:05:28,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:05:28,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:05:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:05:28,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:05:28,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680048569] [2022-07-20 06:05:28,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680048569] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:05:28,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102841430] [2022-07-20 06:05:28,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:05:28,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:05:28,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:05:28,565 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) [2022-07-20 06:05:28,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 06:05:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:05:28,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-20 06:05:28,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:05:28,757 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 [2022-07-20 06:05:28,791 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 13 treesize of output 9 [2022-07-20 06:05:28,794 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 13 treesize of output 9 [2022-07-20 06:05:28,859 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:05:28,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-20 06:05:28,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 06:05:28,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 06:05:28,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 06:05:28,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 06:05:28,983 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 06:05:28,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-20 06:05:28,986 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 3 [2022-07-20 06:05:28,997 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 06:05:28,998 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 16 treesize of output 22 [2022-07-20 06:05:29,002 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 3 [2022-07-20 06:05:29,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:05:29,047 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-07-20 06:05:29,047 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 25 treesize of output 28 [2022-07-20 06:05:29,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:05:29,057 INFO L356 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-07-20 06:05:29,057 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 37 treesize of output 46 [2022-07-20 06:05:29,666 INFO L356 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2022-07-20 06:05:29,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 16 [2022-07-20 06:05:29,821 INFO L356 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2022-07-20 06:05:29,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 25 [2022-07-20 06:05:29,824 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:05:29,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:05:30,094 INFO L356 Elim1Store]: treesize reduction 5, result has 79.2 percent of original size [2022-07-20 06:05:30,094 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 28 treesize of output 27 [2022-07-20 06:05:30,564 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:05:30,565 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 06:05:30,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:05:30,573 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:05:30,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 59 [2022-07-20 06:05:31,848 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:05:31,848 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-07-20 06:05:31,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 150 [2022-07-20 06:05:31,864 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:05:31,864 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 152 treesize of output 144 [2022-07-20 06:05:31,873 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 69 treesize of output 61 [2022-07-20 06:05:31,898 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:05:31,899 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 61 [2022-07-20 06:05:31,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:05:31,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 154 [2022-07-20 06:05:31,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:05:31,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 111 [2022-07-20 06:05:31,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:05:31,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:05:31,931 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:05:31,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 150 treesize of output 126 [2022-07-20 06:05:32,075 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:05:32,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102841430] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:05:32,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:05:32,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 22] total 54 [2022-07-20 06:05:32,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214161084] [2022-07-20 06:05:32,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:05:32,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-20 06:05:32,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:05:32,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-20 06:05:32,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2792, Unknown=13, NotChecked=0, Total=2970 [2022-07-20 06:05:32,077 INFO L87 Difference]: Start difference. First operand 395 states and 442 transitions. Second operand has 55 states, 54 states have (on average 2.9074074074074074) internal successors, (157), 55 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:05:36,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:05:36,499 INFO L93 Difference]: Finished difference Result 784 states and 871 transitions. [2022-07-20 06:05:36,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-20 06:05:36,499 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.9074074074074074) internal successors, (157), 55 states have internal predecessors, (157), 0 states have call successors, (0), 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 57 [2022-07-20 06:05:36,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:05:36,501 INFO L225 Difference]: With dead ends: 784 [2022-07-20 06:05:36,501 INFO L226 Difference]: Without dead ends: 784 [2022-07-20 06:05:36,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=736, Invalid=6391, Unknown=13, NotChecked=0, Total=7140 [2022-07-20 06:05:36,503 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 3141 mSDsluCounter, 6370 mSDsCounter, 0 mSdLazyCounter, 3622 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3143 SdHoareTripleChecker+Valid, 6598 SdHoareTripleChecker+Invalid, 5456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 3622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1607 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-20 06:05:36,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3143 Valid, 6598 Invalid, 5456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 3622 Invalid, 0 Unknown, 1607 Unchecked, 1.8s Time] [2022-07-20 06:05:36,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-07-20 06:05:36,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 396. [2022-07-20 06:05:36,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 308 states have (on average 1.405844155844156) internal successors, (433), 393 states have internal predecessors, (433), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:05:36,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 444 transitions. [2022-07-20 06:05:36,509 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 444 transitions. Word has length 57 [2022-07-20 06:05:36,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:05:36,509 INFO L495 AbstractCegarLoop]: Abstraction has 396 states and 444 transitions. [2022-07-20 06:05:36,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.9074074074074074) internal successors, (157), 55 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:05:36,509 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 444 transitions. [2022-07-20 06:05:36,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-20 06:05:36,510 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:05:36,510 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:05:36,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-20 06:05:36,728 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,SelfDestructingSolverStorable46 [2022-07-20 06:05:36,728 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:05:36,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:05:36,729 INFO L85 PathProgramCache]: Analyzing trace with hash -857937035, now seen corresponding path program 1 times [2022-07-20 06:05:36,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:05:36,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117464538] [2022-07-20 06:05:36,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:05:36,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:05:36,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:05:37,328 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:05:37,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:05:37,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117464538] [2022-07-20 06:05:37,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117464538] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:05:37,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694061387] [2022-07-20 06:05:37,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:05:37,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:05:37,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:05:37,330 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) [2022-07-20 06:05:37,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 06:05:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:05:37,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-20 06:05:37,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:05:37,515 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 [2022-07-20 06:05:37,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 06:05:37,555 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 13 treesize of output 9 [2022-07-20 06:05:37,627 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 06:05:37,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 06:05:37,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 06:05:37,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 06:05:37,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 06:05:37,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 06:05:37,711 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:05:37,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-20 06:05:37,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 06:05:37,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 06:05:37,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-20 06:05:37,770 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 27 treesize of output 26 [2022-07-20 06:05:38,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:05:38,133 INFO L356 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-07-20 06:05:38,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 33 [2022-07-20 06:05:38,138 INFO L356 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-07-20 06:05:38,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 16 [2022-07-20 06:05:38,169 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:05:38,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:05:38,695 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:05:38,696 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 06:05:38,701 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:05:38,701 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 06:05:39,341 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:05:39,342 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2022-07-20 06:05:39,344 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 140 treesize of output 122 [2022-07-20 06:05:39,350 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:05:39,351 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 124 treesize of output 116 [2022-07-20 06:05:39,354 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 102 treesize of output 94 [2022-07-20 06:05:39,414 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:05:39,414 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2022-07-20 06:05:39,426 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 70 treesize of output 58 [2022-07-20 06:05:39,436 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:05:39,436 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 60 treesize of output 60 [2022-07-20 06:05:39,441 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 24 treesize of output 20 [2022-07-20 06:05:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:05:39,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694061387] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:05:39,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:05:39,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 19] total 49 [2022-07-20 06:05:39,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102463102] [2022-07-20 06:05:39,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:05:39,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-20 06:05:39,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:05:39,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-20 06:05:39,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2216, Unknown=8, NotChecked=0, Total=2352 [2022-07-20 06:05:39,821 INFO L87 Difference]: Start difference. First operand 396 states and 444 transitions. Second operand has 49 states, 49 states have (on average 3.2244897959183674) internal successors, (158), 49 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:05:46,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:05:46,573 INFO L93 Difference]: Finished difference Result 776 states and 862 transitions. [2022-07-20 06:05:46,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-20 06:05:46,574 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.2244897959183674) internal successors, (158), 49 states have internal predecessors, (158), 0 states have call successors, (0), 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 57 [2022-07-20 06:05:46,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:05:46,576 INFO L225 Difference]: With dead ends: 776 [2022-07-20 06:05:46,576 INFO L226 Difference]: Without dead ends: 772 [2022-07-20 06:05:46,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=752, Invalid=6380, Unknown=8, NotChecked=0, Total=7140 [2022-07-20 06:05:46,577 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 2766 mSDsluCounter, 5493 mSDsCounter, 0 mSdLazyCounter, 4402 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2768 SdHoareTripleChecker+Valid, 5697 SdHoareTripleChecker+Invalid, 5775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 4402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1091 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:05:46,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2768 Valid, 5697 Invalid, 5775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 4402 Invalid, 0 Unknown, 1091 Unchecked, 2.3s Time] [2022-07-20 06:05:46,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-07-20 06:05:46,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 428. [2022-07-20 06:05:46,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 340 states have (on average 1.3705882352941177) internal successors, (466), 425 states have internal predecessors, (466), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:05:46,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 477 transitions. [2022-07-20 06:05:46,583 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 477 transitions. Word has length 57 [2022-07-20 06:05:46,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:05:46,583 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 477 transitions. [2022-07-20 06:05:46,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.2244897959183674) internal successors, (158), 49 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:05:46,584 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 477 transitions. [2022-07-20 06:05:46,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 06:05:46,584 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:05:46,584 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:05:46,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-20 06:05:46,805 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,SelfDestructingSolverStorable47 [2022-07-20 06:05:46,805 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:05:46,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:05:46,805 INFO L85 PathProgramCache]: Analyzing trace with hash 2019740316, now seen corresponding path program 1 times [2022-07-20 06:05:46,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:05:46,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108008003] [2022-07-20 06:05:46,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:05:46,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:05:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:05:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 06:05:46,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:05:46,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108008003] [2022-07-20 06:05:46,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108008003] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:05:46,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:05:46,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-20 06:05:46,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831726279] [2022-07-20 06:05:46,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:05:46,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 06:05:46,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:05:46,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 06:05:46,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-20 06:05:46,866 INFO L87 Difference]: Start difference. First operand 428 states and 477 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:05:47,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:05:47,199 INFO L93 Difference]: Finished difference Result 1022 states and 1125 transitions. [2022-07-20 06:05:47,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-20 06:05:47,199 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-20 06:05:47,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:05:47,201 INFO L225 Difference]: With dead ends: 1022 [2022-07-20 06:05:47,201 INFO L226 Difference]: Without dead ends: 1022 [2022-07-20 06:05:47,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2022-07-20 06:05:47,202 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 1805 mSDsluCounter, 2002 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1807 SdHoareTripleChecker+Valid, 2483 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:05:47,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1807 Valid, 2483 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:05:47,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2022-07-20 06:05:47,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 481. [2022-07-20 06:05:47,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 391 states have (on average 1.432225063938619) internal successors, (560), 478 states have internal predecessors, (560), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:05:47,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 575 transitions. [2022-07-20 06:05:47,209 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 575 transitions. Word has length 60 [2022-07-20 06:05:47,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:05:47,209 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 575 transitions. [2022-07-20 06:05:47,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:05:47,209 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 575 transitions. [2022-07-20 06:05:47,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 06:05:47,210 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:05:47,210 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:05:47,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-07-20 06:05:47,210 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:05:47,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:05:47,211 INFO L85 PathProgramCache]: Analyzing trace with hash 590188247, now seen corresponding path program 1 times [2022-07-20 06:05:47,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:05:47,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714934877] [2022-07-20 06:05:47,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:05:47,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:05:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:05:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:05:48,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:05:48,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714934877] [2022-07-20 06:05:48,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714934877] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:05:48,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865340717] [2022-07-20 06:05:48,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:05:48,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:05:48,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:05:48,009 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) [2022-07-20 06:05:48,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-20 06:05:48,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:05:48,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 102 conjunts are in the unsatisfiable core [2022-07-20 06:05:48,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:05:48,172 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 [2022-07-20 06:05:48,187 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 11 treesize of output 7 [2022-07-20 06:05:48,190 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 11 treesize of output 7 [2022-07-20 06:05:48,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:05:48,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-20 06:05:48,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:05:48,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-20 06:05:48,222 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 06:05:48,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 06:05:48,274 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 [2022-07-20 06:05:48,276 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 23 treesize of output 22 [2022-07-20 06:05:48,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:05:48,294 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 06:05:48,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 54 [2022-07-20 06:05:48,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:05:48,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 48 [2022-07-20 06:05:48,380 INFO L356 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2022-07-20 06:05:48,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2022-07-20 06:05:48,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 45 [2022-07-20 06:05:48,453 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-20 06:05:48,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 62 [2022-07-20 06:05:48,490 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-20 06:05:48,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 62 [2022-07-20 06:05:48,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 45 [2022-07-20 06:05:48,522 INFO L356 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2022-07-20 06:05:48,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 29 [2022-07-20 06:05:48,606 INFO L356 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-07-20 06:05:48,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 55 [2022-07-20 06:05:48,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 45 [2022-07-20 06:05:48,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:05:48,694 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-07-20 06:05:48,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 72 [2022-07-20 06:05:48,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:05:48,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 66 [2022-07-20 06:05:49,538 INFO L356 Elim1Store]: treesize reduction 125, result has 8.1 percent of original size [2022-07-20 06:05:49,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 184 treesize of output 97 [2022-07-20 06:05:49,554 INFO L356 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2022-07-20 06:05:49,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 28 [2022-07-20 06:05:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:05:49,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:05:49,906 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:05:49,906 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2022-07-20 06:05:49,912 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:05:49,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 53 [2022-07-20 06:05:53,421 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~node~1#1.base_32| Int) (|v_ULTIMATE.start_main_~item~0#1.base_35| Int) (|v_ULTIMATE.start_main_~item~0#1.base_36| Int)) (let ((.cse4 (store |c_#valid| |v_ULTIMATE.start_main_~item~0#1.base_36| 1))) (or (and (forall ((v_ArrVal_2490 (Array Int Int)) (v_arrayElimArr_33 (Array Int Int)) (v_ArrVal_2485 Int) (v_ArrVal_2484 Int) (v_ArrVal_2489 (Array Int Int))) (or (= 0 (select (let ((.cse0 (let ((.cse1 (store (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~item~0#1.base_36| (store (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~item~0#1.base_36|) 0 |c_ULTIMATE.start_main_~node~1#1.base|) 4 v_ArrVal_2484)) |v_ULTIMATE.start_main_~node~1#1.base_32| v_ArrVal_2489))) (store .cse1 |v_ULTIMATE.start_main_~item~0#1.base_35| (store (store (select .cse1 |v_ULTIMATE.start_main_~item~0#1.base_35|) 0 |v_ULTIMATE.start_main_~node~1#1.base_32|) 4 |v_ULTIMATE.start_main_~item~0#1.base_36|))))) (select .cse0 (select (select .cse0 |v_ULTIMATE.start_main_~item~0#1.base_36|) 0))) (select (select (store (store (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~item~0#1.base_36| (store (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~item~0#1.base_36|) 0 |c_ULTIMATE.start_main_~node~1#1.offset|) 4 v_ArrVal_2485)) |v_ULTIMATE.start_main_~node~1#1.base_32| v_ArrVal_2490) |v_ULTIMATE.start_main_~item~0#1.base_35| v_arrayElimArr_33) |v_ULTIMATE.start_main_~item~0#1.base_36|) 0))) (not (= (select v_arrayElimArr_33 4) 0)))) (forall ((v_ArrVal_2490 (Array Int Int)) (v_arrayElimArr_32 (Array Int Int)) (v_ArrVal_2485 Int) (v_ArrVal_2484 Int) (v_ArrVal_2489 (Array Int Int))) (or (= (let ((.cse2 (store (store (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~item~0#1.base_36| (store (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~item~0#1.base_36|) 0 |c_ULTIMATE.start_main_~node~1#1.offset|) 4 v_ArrVal_2485)) |v_ULTIMATE.start_main_~node~1#1.base_32| v_ArrVal_2490) |v_ULTIMATE.start_main_~item~0#1.base_35| v_arrayElimArr_32))) (select (select .cse2 (select (select (let ((.cse3 (store (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~item~0#1.base_36| (store (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~item~0#1.base_36|) 0 |c_ULTIMATE.start_main_~node~1#1.base|) 4 v_ArrVal_2484)) |v_ULTIMATE.start_main_~node~1#1.base_32| v_ArrVal_2489))) (store .cse3 |v_ULTIMATE.start_main_~item~0#1.base_35| (store (store (select .cse3 |v_ULTIMATE.start_main_~item~0#1.base_35|) 0 |v_ULTIMATE.start_main_~node~1#1.base_32|) 4 |v_ULTIMATE.start_main_~item~0#1.base_36|))) |v_ULTIMATE.start_main_~item~0#1.base_36|) 0)) (select (select .cse2 |v_ULTIMATE.start_main_~item~0#1.base_36|) 0))) 0) (not (= (select v_arrayElimArr_32 4) 0))))) (not (= (select (store .cse4 |v_ULTIMATE.start_main_~node~1#1.base_32| 1) |v_ULTIMATE.start_main_~item~0#1.base_35|) 0)) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~item~0#1.base_36|) 0)) (not (= (select .cse4 |v_ULTIMATE.start_main_~node~1#1.base_32|) 0))))) is different from false [2022-07-20 06:05:54,052 INFO L356 Elim1Store]: treesize reduction 158, result has 22.2 percent of original size [2022-07-20 06:05:54,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 163 [2022-07-20 06:05:54,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:05:54,109 INFO L356 Elim1Store]: treesize reduction 125, result has 24.2 percent of original size [2022-07-20 06:05:54,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 118 treesize of output 84 [2022-07-20 06:05:54,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:05:54,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:05:54,133 INFO L356 Elim1Store]: treesize reduction 72, result has 5.3 percent of original size [2022-07-20 06:05:54,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 241 treesize of output 200 [2022-07-20 06:05:54,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:05:54,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:05:54,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:05:54,142 INFO L356 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-07-20 06:05:54,143 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 93 treesize of output 61 [2022-07-20 06:05:54,150 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:05:54,150 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 54 treesize of output 56 [2022-07-20 06:05:54,154 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 20 [2022-07-20 06:05:54,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:05:54,250 INFO L356 Elim1Store]: treesize reduction 125, result has 24.2 percent of original size [2022-07-20 06:05:54,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 240 treesize of output 243 [2022-07-20 06:05:54,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:05:54,312 INFO L356 Elim1Store]: treesize reduction 115, result has 30.3 percent of original size [2022-07-20 06:05:54,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 203 treesize of output 105 [2022-07-20 06:05:54,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:05:54,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:05:54,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:05:54,324 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-07-20 06:05:54,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 63 [2022-07-20 06:05:54,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:05:54,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:05:54,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:05:54,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:05:54,350 INFO L356 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2022-07-20 06:05:54,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 251 treesize of output 223 [2022-07-20 06:05:54,359 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 162 treesize of output 158 [2022-07-20 06:05:54,412 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-07-20 06:05:54,430 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 40 treesize of output 34 [2022-07-20 06:05:54,444 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:05:54,444 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 240 treesize of output 232 [2022-07-20 06:05:54,803 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 10 refuted. 2 times theorem prover too weak. 0 trivial. 1 not checked. [2022-07-20 06:05:54,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865340717] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:05:54,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:05:54,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 17, 22] total 51 [2022-07-20 06:05:54,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750070263] [2022-07-20 06:05:54,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:05:54,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-20 06:05:54,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:05:54,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-20 06:05:54,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2267, Unknown=23, NotChecked=96, Total=2550 [2022-07-20 06:05:54,804 INFO L87 Difference]: Start difference. First operand 481 states and 575 transitions. Second operand has 51 states, 51 states have (on average 2.9215686274509802) internal successors, (149), 51 states have internal predecessors, (149), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:01,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:06:01,039 INFO L93 Difference]: Finished difference Result 570 states and 664 transitions. [2022-07-20 06:06:01,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-20 06:06:01,039 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.9215686274509802) internal successors, (149), 51 states have internal predecessors, (149), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-20 06:06:01,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:06:01,040 INFO L225 Difference]: With dead ends: 570 [2022-07-20 06:06:01,041 INFO L226 Difference]: Without dead ends: 570 [2022-07-20 06:06:01,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 102 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=843, Invalid=4394, Unknown=23, NotChecked=142, Total=5402 [2022-07-20 06:06:01,041 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 1511 mSDsluCounter, 6361 mSDsCounter, 0 mSdLazyCounter, 1988 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1511 SdHoareTripleChecker+Valid, 6602 SdHoareTripleChecker+Invalid, 3736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1624 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:06:01,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1511 Valid, 6602 Invalid, 3736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1988 Invalid, 0 Unknown, 1624 Unchecked, 1.2s Time] [2022-07-20 06:06:01,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-07-20 06:06:01,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 482. [2022-07-20 06:06:01,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 392 states have (on average 1.4311224489795917) internal successors, (561), 479 states have internal predecessors, (561), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:06:01,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 576 transitions. [2022-07-20 06:06:01,047 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 576 transitions. Word has length 60 [2022-07-20 06:06:01,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:06:01,048 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 576 transitions. [2022-07-20 06:06:01,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.9215686274509802) internal successors, (149), 51 states have internal predecessors, (149), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:01,048 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 576 transitions. [2022-07-20 06:06:01,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 06:06:01,048 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:06:01,049 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:06:01,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-20 06:06:01,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:06:01,256 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr84REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:06:01,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:06:01,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1283333183, now seen corresponding path program 1 times [2022-07-20 06:06:01,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:06:01,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927661368] [2022-07-20 06:06:01,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:06:01,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:06:01,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:06:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:06:01,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:06:01,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927661368] [2022-07-20 06:06:01,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927661368] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:06:01,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:06:01,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-20 06:06:01,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528736711] [2022-07-20 06:06:01,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:06:01,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 06:06:01,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:06:01,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 06:06:01,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-07-20 06:06:01,366 INFO L87 Difference]: Start difference. First operand 482 states and 576 transitions. Second operand has 12 states, 11 states have (on average 5.454545454545454) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:02,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:06:02,034 INFO L93 Difference]: Finished difference Result 613 states and 704 transitions. [2022-07-20 06:06:02,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-20 06:06:02,035 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.454545454545454) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 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 [2022-07-20 06:06:02,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:06:02,036 INFO L225 Difference]: With dead ends: 613 [2022-07-20 06:06:02,036 INFO L226 Difference]: Without dead ends: 613 [2022-07-20 06:06:02,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=557, Unknown=0, NotChecked=0, Total=756 [2022-07-20 06:06:02,037 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 1072 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1074 SdHoareTripleChecker+Valid, 1255 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 06:06:02,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1074 Valid, 1255 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 06:06:02,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-07-20 06:06:02,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 491. [2022-07-20 06:06:02,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 402 states have (on average 1.4228855721393034) internal successors, (572), 488 states have internal predecessors, (572), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:06:02,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 587 transitions. [2022-07-20 06:06:02,042 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 587 transitions. Word has length 60 [2022-07-20 06:06:02,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:06:02,043 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 587 transitions. [2022-07-20 06:06:02,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.454545454545454) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:02,043 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 587 transitions. [2022-07-20 06:06:02,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 06:06:02,043 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:06:02,044 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:06:02,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-07-20 06:06:02,044 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr85REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:06:02,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:06:02,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1283333182, now seen corresponding path program 1 times [2022-07-20 06:06:02,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:06:02,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786527766] [2022-07-20 06:06:02,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:06:02,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:06:02,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:06:02,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:06:02,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:06:02,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786527766] [2022-07-20 06:06:02,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786527766] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:06:02,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:06:02,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-20 06:06:02,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400687658] [2022-07-20 06:06:02,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:06:02,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 06:06:02,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:06:02,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 06:06:02,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-20 06:06:02,141 INFO L87 Difference]: Start difference. First operand 491 states and 587 transitions. Second operand has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:02,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:06:02,564 INFO L93 Difference]: Finished difference Result 546 states and 637 transitions. [2022-07-20 06:06:02,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 06:06:02,564 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 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 [2022-07-20 06:06:02,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:06:02,566 INFO L225 Difference]: With dead ends: 546 [2022-07-20 06:06:02,566 INFO L226 Difference]: Without dead ends: 546 [2022-07-20 06:06:02,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2022-07-20 06:06:02,566 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 769 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:06:02,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [771 Valid, 1151 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 06:06:02,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-07-20 06:06:02,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 493. [2022-07-20 06:06:02,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 404 states have (on average 1.4183168316831682) internal successors, (573), 490 states have internal predecessors, (573), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:06:02,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 588 transitions. [2022-07-20 06:06:02,571 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 588 transitions. Word has length 60 [2022-07-20 06:06:02,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:06:02,571 INFO L495 AbstractCegarLoop]: Abstraction has 493 states and 588 transitions. [2022-07-20 06:06:02,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:02,571 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 588 transitions. [2022-07-20 06:06:02,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 06:06:02,571 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:06:02,572 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:06:02,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-07-20 06:06:02,572 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr68REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:06:02,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:06:02,572 INFO L85 PathProgramCache]: Analyzing trace with hash 2019739106, now seen corresponding path program 1 times [2022-07-20 06:06:02,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:06:02,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663977505] [2022-07-20 06:06:02,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:06:02,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:06:02,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:06:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 06:06:02,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:06:02,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663977505] [2022-07-20 06:06:02,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663977505] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:06:02,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:06:02,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 06:06:02,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889305898] [2022-07-20 06:06:02,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:06:02,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 06:06:02,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:06:02,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 06:06:02,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:06:02,656 INFO L87 Difference]: Start difference. First operand 493 states and 588 transitions. Second operand has 8 states, 7 states have (on average 7.571428571428571) internal successors, (53), 8 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) [2022-07-20 06:06:03,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:06:03,056 INFO L93 Difference]: Finished difference Result 539 states and 623 transitions. [2022-07-20 06:06:03,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 06:06:03,057 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.571428571428571) internal successors, (53), 8 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) Word has length 60 [2022-07-20 06:06:03,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:06:03,058 INFO L225 Difference]: With dead ends: 539 [2022-07-20 06:06:03,058 INFO L226 Difference]: Without dead ends: 539 [2022-07-20 06:06:03,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-07-20 06:06:03,059 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 432 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:06:03,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 958 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 06:06:03,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-07-20 06:06:03,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 493. [2022-07-20 06:06:03,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 404 states have (on average 1.4108910891089108) internal successors, (570), 490 states have internal predecessors, (570), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:06:03,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 585 transitions. [2022-07-20 06:06:03,064 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 585 transitions. Word has length 60 [2022-07-20 06:06:03,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:06:03,064 INFO L495 AbstractCegarLoop]: Abstraction has 493 states and 585 transitions. [2022-07-20 06:06:03,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.571428571428571) internal successors, (53), 8 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) [2022-07-20 06:06:03,064 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 585 transitions. [2022-07-20 06:06:03,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-20 06:06:03,065 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:06:03,065 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:06:03,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-07-20 06:06:03,065 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr89ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:06:03,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:06:03,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1128624014, now seen corresponding path program 1 times [2022-07-20 06:06:03,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:06:03,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765453789] [2022-07-20 06:06:03,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:06:03,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:06:03,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:06:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:06:03,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:06:03,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765453789] [2022-07-20 06:06:03,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765453789] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:06:03,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:06:03,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-20 06:06:03,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703633661] [2022-07-20 06:06:03,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:06:03,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 06:06:03,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:06:03,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 06:06:03,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-07-20 06:06:03,163 INFO L87 Difference]: Start difference. First operand 493 states and 585 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:03,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:06:03,506 INFO L93 Difference]: Finished difference Result 543 states and 631 transitions. [2022-07-20 06:06:03,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 06:06:03,506 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2022-07-20 06:06:03,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:06:03,507 INFO L225 Difference]: With dead ends: 543 [2022-07-20 06:06:03,507 INFO L226 Difference]: Without dead ends: 543 [2022-07-20 06:06:03,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-07-20 06:06:03,508 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 708 mSDsluCounter, 1613 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 1833 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:06:03,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [710 Valid, 1833 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 06:06:03,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-07-20 06:06:03,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 493. [2022-07-20 06:06:03,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 404 states have (on average 1.4084158415841583) internal successors, (569), 490 states have internal predecessors, (569), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:06:03,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 584 transitions. [2022-07-20 06:06:03,513 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 584 transitions. Word has length 61 [2022-07-20 06:06:03,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:06:03,513 INFO L495 AbstractCegarLoop]: Abstraction has 493 states and 584 transitions. [2022-07-20 06:06:03,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:03,513 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 584 transitions. [2022-07-20 06:06:03,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-20 06:06:03,514 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:06:03,514 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:06:03,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-07-20 06:06:03,514 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:06:03,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:06:03,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1851234328, now seen corresponding path program 1 times [2022-07-20 06:06:03,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:06:03,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726168066] [2022-07-20 06:06:03,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:06:03,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:06:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:06:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 06:06:03,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:06:03,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726168066] [2022-07-20 06:06:03,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726168066] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:06:03,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646998449] [2022-07-20 06:06:03,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:06:03,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:06:03,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:06:03,664 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) [2022-07-20 06:06:03,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-20 06:06:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:06:03,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-20 06:06:03,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:06:03,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 06:06:03,959 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 20 treesize of output 8 [2022-07-20 06:06:03,971 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 06:06:03,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:06:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 06:06:04,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646998449] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:06:04,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:06:04,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 23 [2022-07-20 06:06:04,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459474941] [2022-07-20 06:06:04,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:06:04,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-20 06:06:04,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:06:04,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-20 06:06:04,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-07-20 06:06:04,090 INFO L87 Difference]: Start difference. First operand 493 states and 584 transitions. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:04,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:06:04,721 INFO L93 Difference]: Finished difference Result 643 states and 772 transitions. [2022-07-20 06:06:04,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 06:06:04,722 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-20 06:06:04,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:06:04,723 INFO L225 Difference]: With dead ends: 643 [2022-07-20 06:06:04,723 INFO L226 Difference]: Without dead ends: 643 [2022-07-20 06:06:04,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=242, Invalid=948, Unknown=0, NotChecked=0, Total=1190 [2022-07-20 06:06:04,724 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 2487 mSDsluCounter, 1974 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2487 SdHoareTripleChecker+Valid, 2220 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 06:06:04,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2487 Valid, 2220 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 06:06:04,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-07-20 06:06:04,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 474. [2022-07-20 06:06:04,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 385 states have (on average 1.4207792207792207) internal successors, (547), 471 states have internal predecessors, (547), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:06:04,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 562 transitions. [2022-07-20 06:06:04,729 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 562 transitions. Word has length 63 [2022-07-20 06:06:04,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:06:04,729 INFO L495 AbstractCegarLoop]: Abstraction has 474 states and 562 transitions. [2022-07-20 06:06:04,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:04,729 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 562 transitions. [2022-07-20 06:06:04,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-20 06:06:04,730 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:06:04,730 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:06:04,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-20 06:06:04,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:06:04,948 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr87ASSERT_VIOLATIONMEMORY_FREE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:06:04,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:06:04,948 INFO L85 PathProgramCache]: Analyzing trace with hash 2020513782, now seen corresponding path program 1 times [2022-07-20 06:06:04,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:06:04,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808393096] [2022-07-20 06:06:04,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:06:04,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:06:04,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:06:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:06:05,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:06:05,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808393096] [2022-07-20 06:06:05,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808393096] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:06:05,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:06:05,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 06:06:05,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630899295] [2022-07-20 06:06:05,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:06:05,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 06:06:05,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:06:05,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 06:06:05,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:06:05,025 INFO L87 Difference]: Start difference. First operand 474 states and 562 transitions. Second operand has 8 states, 7 states have (on average 9.0) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:05,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:06:05,322 INFO L93 Difference]: Finished difference Result 532 states and 617 transitions. [2022-07-20 06:06:05,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 06:06:05,322 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.0) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2022-07-20 06:06:05,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:06:05,323 INFO L225 Difference]: With dead ends: 532 [2022-07-20 06:06:05,323 INFO L226 Difference]: Without dead ends: 532 [2022-07-20 06:06:05,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-07-20 06:06:05,324 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 731 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:06:05,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [733 Valid, 896 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:06:05,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-07-20 06:06:05,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 480. [2022-07-20 06:06:05,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 391 states have (on average 1.4245524296675192) internal successors, (557), 477 states have internal predecessors, (557), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:06:05,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 572 transitions. [2022-07-20 06:06:05,329 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 572 transitions. Word has length 63 [2022-07-20 06:06:05,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:06:05,329 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 572 transitions. [2022-07-20 06:06:05,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.0) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:05,329 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 572 transitions. [2022-07-20 06:06:05,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-20 06:06:05,329 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:06:05,329 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:06:05,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-07-20 06:06:05,330 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr84REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:06:05,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:06:05,330 INFO L85 PathProgramCache]: Analyzing trace with hash -840009178, now seen corresponding path program 1 times [2022-07-20 06:06:05,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:06:05,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630739939] [2022-07-20 06:06:05,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:06:05,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:06:05,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:06:05,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:06:05,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:06:05,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630739939] [2022-07-20 06:06:05,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630739939] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:06:05,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626000577] [2022-07-20 06:06:05,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:06:05,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:06:05,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:06:05,502 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) [2022-07-20 06:06:05,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-20 06:06:05,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:06:05,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-20 06:06:05,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:06:05,961 INFO L356 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2022-07-20 06:06:05,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 47 [2022-07-20 06:06:05,970 INFO L356 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2022-07-20 06:06:05,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 28 [2022-07-20 06:06:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 06:06:06,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:06:06,534 INFO L356 Elim1Store]: treesize reduction 15, result has 83.5 percent of original size [2022-07-20 06:06:06,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 133 [2022-07-20 06:06:06,566 INFO L356 Elim1Store]: treesize reduction 36, result has 46.3 percent of original size [2022-07-20 06:06:06,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 100 [2022-07-20 06:06:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 06:06:06,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626000577] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:06:06,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:06:06,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 32 [2022-07-20 06:06:06,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737229761] [2022-07-20 06:06:06,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:06:06,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-20 06:06:06,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:06:06,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-20 06:06:06,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2022-07-20 06:06:06,804 INFO L87 Difference]: Start difference. First operand 480 states and 572 transitions. Second operand has 32 states, 32 states have (on average 5.25) internal successors, (168), 32 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:07,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:06:07,569 INFO L93 Difference]: Finished difference Result 505 states and 593 transitions. [2022-07-20 06:06:07,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-20 06:06:07,569 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.25) internal successors, (168), 32 states have internal predecessors, (168), 0 states have call successors, (0), 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 66 [2022-07-20 06:06:07,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:06:07,570 INFO L225 Difference]: With dead ends: 505 [2022-07-20 06:06:07,570 INFO L226 Difference]: Without dead ends: 505 [2022-07-20 06:06:07,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=202, Invalid=1520, Unknown=0, NotChecked=0, Total=1722 [2022-07-20 06:06:07,571 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 743 mSDsluCounter, 3212 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 06:06:07,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [745 Valid, 3413 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1116 Invalid, 0 Unknown, 87 Unchecked, 0.5s Time] [2022-07-20 06:06:07,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-07-20 06:06:07,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 483. [2022-07-20 06:06:07,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 394 states have (on average 1.4213197969543148) internal successors, (560), 480 states have internal predecessors, (560), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:06:07,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 575 transitions. [2022-07-20 06:06:07,576 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 575 transitions. Word has length 66 [2022-07-20 06:06:07,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:06:07,576 INFO L495 AbstractCegarLoop]: Abstraction has 483 states and 575 transitions. [2022-07-20 06:06:07,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.25) internal successors, (168), 32 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:07,576 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 575 transitions. [2022-07-20 06:06:07,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-20 06:06:07,577 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:06:07,577 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:06:07,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-20 06:06:07,794 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,SelfDestructingSolverStorable56 [2022-07-20 06:06:07,794 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr89ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:06:07,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:06:07,795 INFO L85 PathProgramCache]: Analyzing trace with hash -270481747, now seen corresponding path program 1 times [2022-07-20 06:06:07,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:06:07,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344326333] [2022-07-20 06:06:07,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:06:07,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:06:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:06:07,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:06:07,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:06:07,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344326333] [2022-07-20 06:06:07,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344326333] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:06:07,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383550601] [2022-07-20 06:06:07,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:06:07,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:06:07,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:06:07,993 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) [2022-07-20 06:06:07,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-20 06:06:08,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:06:08,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-20 06:06:08,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:06:08,188 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 06:06:08,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 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 18 treesize of output 32 [2022-07-20 06:06:08,215 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 11 treesize of output 7 [2022-07-20 06:06:08,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2022-07-20 06:06:08,480 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:06:08,480 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 38 treesize of output 30 [2022-07-20 06:06:08,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 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 20 treesize of output 24 [2022-07-20 06:06:08,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:06:08,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:06:09,222 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 47 treesize of output 43 [2022-07-20 06:06:09,224 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 168 treesize of output 164 [2022-07-20 06:06:12,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:06:12,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383550601] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:06:12,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:06:12,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 33 [2022-07-20 06:06:12,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198230158] [2022-07-20 06:06:12,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:06:12,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-20 06:06:12,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:06:12,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-20 06:06:12,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1017, Unknown=0, NotChecked=0, Total=1122 [2022-07-20 06:06:12,100 INFO L87 Difference]: Start difference. First operand 483 states and 575 transitions. Second operand has 34 states, 33 states have (on average 5.606060606060606) internal successors, (185), 34 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:13,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:06:13,068 INFO L93 Difference]: Finished difference Result 485 states and 576 transitions. [2022-07-20 06:06:13,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-20 06:06:13,068 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 5.606060606060606) internal successors, (185), 34 states have internal predecessors, (185), 0 states have call successors, (0), 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 67 [2022-07-20 06:06:13,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:06:13,069 INFO L225 Difference]: With dead ends: 485 [2022-07-20 06:06:13,069 INFO L226 Difference]: Without dead ends: 433 [2022-07-20 06:06:13,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=216, Invalid=1590, Unknown=0, NotChecked=0, Total=1806 [2022-07-20 06:06:13,069 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 295 mSDsluCounter, 2696 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 2906 SdHoareTripleChecker+Invalid, 1737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 808 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 06:06:13,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 2906 Invalid, 1737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 908 Invalid, 0 Unknown, 808 Unchecked, 0.4s Time] [2022-07-20 06:06:13,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-07-20 06:06:13,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 433. [2022-07-20 06:06:13,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 344 states have (on average 1.4796511627906976) internal successors, (509), 430 states have internal predecessors, (509), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:06:13,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 524 transitions. [2022-07-20 06:06:13,074 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 524 transitions. Word has length 67 [2022-07-20 06:06:13,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:06:13,074 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 524 transitions. [2022-07-20 06:06:13,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 5.606060606060606) internal successors, (185), 34 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:13,075 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 524 transitions. [2022-07-20 06:06:13,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-20 06:06:13,075 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:06:13,075 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:06:13,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-20 06:06:13,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:06:13,293 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:06:13,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:06:13,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1905887152, now seen corresponding path program 1 times [2022-07-20 06:06:13,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:06:13,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886671078] [2022-07-20 06:06:13,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:06:13,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:06:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:06:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:06:13,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:06:13,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886671078] [2022-07-20 06:06:13,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886671078] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:06:13,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491342660] [2022-07-20 06:06:13,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:06:13,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:06:13,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:06:13,469 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) [2022-07-20 06:06:13,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-20 06:06:13,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:06:13,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 06:06:13,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:06:13,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 06:06:13,800 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 16 treesize of output 8 [2022-07-20 06:06:13,809 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 06:06:13,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:06:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 06:06:13,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491342660] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:06:13,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:06:13,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 7] total 21 [2022-07-20 06:06:13,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272824793] [2022-07-20 06:06:13,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:06:13,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-20 06:06:13,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:06:13,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-20 06:06:13,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-07-20 06:06:13,886 INFO L87 Difference]: Start difference. First operand 433 states and 524 transitions. Second operand has 21 states, 21 states have (on average 7.190476190476191) internal successors, (151), 21 states have internal predecessors, (151), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:14,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:06:14,345 INFO L93 Difference]: Finished difference Result 539 states and 663 transitions. [2022-07-20 06:06:14,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 06:06:14,346 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.190476190476191) internal successors, (151), 21 states have internal predecessors, (151), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-07-20 06:06:14,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:06:14,347 INFO L225 Difference]: With dead ends: 539 [2022-07-20 06:06:14,347 INFO L226 Difference]: Without dead ends: 539 [2022-07-20 06:06:14,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2022-07-20 06:06:14,347 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 1820 mSDsluCounter, 1733 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1820 SdHoareTripleChecker+Valid, 1956 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:06:14,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1820 Valid, 1956 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 06:06:14,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-07-20 06:06:14,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 403. [2022-07-20 06:06:14,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 314 states have (on average 1.4872611464968153) internal successors, (467), 400 states have internal predecessors, (467), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:06:14,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 482 transitions. [2022-07-20 06:06:14,352 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 482 transitions. Word has length 69 [2022-07-20 06:06:14,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:06:14,352 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 482 transitions. [2022-07-20 06:06:14,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.190476190476191) internal successors, (151), 21 states have internal predecessors, (151), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:14,352 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 482 transitions. [2022-07-20 06:06:14,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-20 06:06:14,352 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:06:14,353 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:06:14,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-20 06:06:14,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:06:14,567 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:06:14,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:06:14,568 INFO L85 PathProgramCache]: Analyzing trace with hash -513218039, now seen corresponding path program 1 times [2022-07-20 06:06:14,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:06:14,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651189649] [2022-07-20 06:06:14,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:06:14,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:06:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:06:14,794 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:06:14,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:06:14,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651189649] [2022-07-20 06:06:14,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651189649] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:06:14,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743790314] [2022-07-20 06:06:14,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:06:14,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:06:14,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:06:14,796 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) [2022-07-20 06:06:14,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-20 06:06:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:06:15,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-20 06:06:15,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:06:15,072 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 13 treesize of output 9 [2022-07-20 06:06:15,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:06:15,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-20 06:06:15,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:06:15,367 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:06:15,367 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 12 [2022-07-20 06:06:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:06:15,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:06:15,648 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:06:15,648 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 35 treesize of output 39 [2022-07-20 06:06:15,723 INFO L356 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2022-07-20 06:06:15,723 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 15 treesize of output 11 [2022-07-20 06:06:16,051 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:06:16,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743790314] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:06:16,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:06:16,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 44 [2022-07-20 06:06:16,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488233876] [2022-07-20 06:06:16,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:06:16,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-20 06:06:16,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:06:16,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-20 06:06:16,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1758, Unknown=0, NotChecked=0, Total=1980 [2022-07-20 06:06:16,053 INFO L87 Difference]: Start difference. First operand 403 states and 482 transitions. Second operand has 45 states, 44 states have (on average 4.386363636363637) internal successors, (193), 45 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:18,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:06:18,615 INFO L93 Difference]: Finished difference Result 711 states and 818 transitions. [2022-07-20 06:06:18,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-20 06:06:18,615 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 4.386363636363637) internal successors, (193), 45 states have internal predecessors, (193), 0 states have call successors, (0), 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 68 [2022-07-20 06:06:18,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:06:18,616 INFO L225 Difference]: With dead ends: 711 [2022-07-20 06:06:18,616 INFO L226 Difference]: Without dead ends: 711 [2022-07-20 06:06:18,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1056, Invalid=4644, Unknown=0, NotChecked=0, Total=5700 [2022-07-20 06:06:18,617 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 2932 mSDsluCounter, 2493 mSDsCounter, 0 mSdLazyCounter, 3262 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2934 SdHoareTripleChecker+Valid, 2652 SdHoareTripleChecker+Invalid, 3466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 3262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-20 06:06:18,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2934 Valid, 2652 Invalid, 3466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 3262 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-20 06:06:18,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2022-07-20 06:06:18,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 409. [2022-07-20 06:06:18,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 320 states have (on average 1.484375) internal successors, (475), 406 states have internal predecessors, (475), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:06:18,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 490 transitions. [2022-07-20 06:06:18,622 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 490 transitions. Word has length 68 [2022-07-20 06:06:18,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:06:18,622 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 490 transitions. [2022-07-20 06:06:18,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 4.386363636363637) internal successors, (193), 45 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:18,622 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 490 transitions. [2022-07-20 06:06:18,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-20 06:06:18,623 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:06:18,623 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:06:18,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-20 06:06:18,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:06:18,840 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:06:18,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:06:18,841 INFO L85 PathProgramCache]: Analyzing trace with hash -513218040, now seen corresponding path program 1 times [2022-07-20 06:06:18,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:06:18,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172581512] [2022-07-20 06:06:18,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:06:18,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:06:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:06:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 06:06:18,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:06:18,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172581512] [2022-07-20 06:06:18,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172581512] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:06:18,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032826096] [2022-07-20 06:06:18,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:06:18,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:06:18,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:06:18,985 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) [2022-07-20 06:06:18,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-20 06:06:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:06:19,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-20 06:06:19,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:06:19,290 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 21 treesize of output 9 [2022-07-20 06:06:19,297 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 06:06:19,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:06:19,390 INFO L356 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-07-20 06:06:19,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2022-07-20 06:06:19,424 INFO L356 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2022-07-20 06:06:19,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 06:06:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 06:06:19,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032826096] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:06:19,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:06:19,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 21 [2022-07-20 06:06:19,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385676702] [2022-07-20 06:06:19,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:06:19,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-20 06:06:19,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:06:19,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-20 06:06:19,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-07-20 06:06:19,523 INFO L87 Difference]: Start difference. First operand 409 states and 490 transitions. Second operand has 22 states, 21 states have (on average 5.857142857142857) internal successors, (123), 22 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:20,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:06:20,485 INFO L93 Difference]: Finished difference Result 609 states and 717 transitions. [2022-07-20 06:06:20,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-20 06:06:20,486 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 5.857142857142857) internal successors, (123), 22 states have internal predecessors, (123), 0 states have call successors, (0), 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 68 [2022-07-20 06:06:20,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:06:20,487 INFO L225 Difference]: With dead ends: 609 [2022-07-20 06:06:20,487 INFO L226 Difference]: Without dead ends: 609 [2022-07-20 06:06:20,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=297, Invalid=1263, Unknown=0, NotChecked=0, Total=1560 [2022-07-20 06:06:20,487 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 1339 mSDsluCounter, 1851 mSDsCounter, 0 mSdLazyCounter, 1669 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1339 SdHoareTripleChecker+Valid, 2039 SdHoareTripleChecker+Invalid, 1783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 06:06:20,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1339 Valid, 2039 Invalid, 1783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1669 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 06:06:20,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-07-20 06:06:20,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 408. [2022-07-20 06:06:20,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 320 states have (on average 1.475) internal successors, (472), 405 states have internal predecessors, (472), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:06:20,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 487 transitions. [2022-07-20 06:06:20,491 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 487 transitions. Word has length 68 [2022-07-20 06:06:20,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:06:20,491 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 487 transitions. [2022-07-20 06:06:20,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 5.857142857142857) internal successors, (123), 22 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:20,492 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 487 transitions. [2022-07-20 06:06:20,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-20 06:06:20,492 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:06:20,492 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:06:20,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-20 06:06:20,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:06:20,692 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:06:20,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:06:20,693 INFO L85 PathProgramCache]: Analyzing trace with hash 718711401, now seen corresponding path program 1 times [2022-07-20 06:06:20,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:06:20,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61342796] [2022-07-20 06:06:20,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:06:20,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:06:20,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:06:20,754 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-20 06:06:20,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:06:20,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61342796] [2022-07-20 06:06:20,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61342796] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:06:20,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:06:20,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:06:20,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358998707] [2022-07-20 06:06:20,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:06:20,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:06:20,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:06:20,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:06:20,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:06:20,756 INFO L87 Difference]: Start difference. First operand 408 states and 487 transitions. Second operand has 3 states, 2 states have (on average 28.5) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:20,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:06:20,824 INFO L93 Difference]: Finished difference Result 407 states and 485 transitions. [2022-07-20 06:06:20,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:06:20,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 28.5) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 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 70 [2022-07-20 06:06:20,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:06:20,825 INFO L225 Difference]: With dead ends: 407 [2022-07-20 06:06:20,825 INFO L226 Difference]: Without dead ends: 407 [2022-07-20 06:06:20,825 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 [2022-07-20 06:06:20,826 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 48 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:06:20,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 338 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:06:20,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-07-20 06:06:20,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2022-07-20 06:06:20,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 320 states have (on average 1.46875) internal successors, (470), 404 states have internal predecessors, (470), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:06:20,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 485 transitions. [2022-07-20 06:06:20,830 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 485 transitions. Word has length 70 [2022-07-20 06:06:20,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:06:20,830 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 485 transitions. [2022-07-20 06:06:20,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 28.5) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:20,830 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 485 transitions. [2022-07-20 06:06:20,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-20 06:06:20,831 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:06:20,831 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:06:20,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-07-20 06:06:20,831 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:06:20,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:06:20,831 INFO L85 PathProgramCache]: Analyzing trace with hash 718711402, now seen corresponding path program 1 times [2022-07-20 06:06:20,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:06:20,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930545792] [2022-07-20 06:06:20,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:06:20,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:06:20,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:06:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-20 06:06:20,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:06:20,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930545792] [2022-07-20 06:06:20,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930545792] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:06:20,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:06:20,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:06:20,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776759383] [2022-07-20 06:06:20,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:06:20,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:06:20,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:06:20,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:06:20,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:06:20,862 INFO L87 Difference]: Start difference. First operand 407 states and 485 transitions. Second operand has 3 states, 2 states have (on average 28.5) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:20,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:06:20,938 INFO L93 Difference]: Finished difference Result 406 states and 483 transitions. [2022-07-20 06:06:20,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:06:20,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 28.5) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 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 70 [2022-07-20 06:06:20,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:06:20,940 INFO L225 Difference]: With dead ends: 406 [2022-07-20 06:06:20,940 INFO L226 Difference]: Without dead ends: 406 [2022-07-20 06:06:20,940 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 [2022-07-20 06:06:20,940 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 47 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:06:20,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 331 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:06:20,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-07-20 06:06:20,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 406. [2022-07-20 06:06:20,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 320 states have (on average 1.4625) internal successors, (468), 403 states have internal predecessors, (468), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:06:20,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 483 transitions. [2022-07-20 06:06:20,944 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 483 transitions. Word has length 70 [2022-07-20 06:06:20,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:06:20,944 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 483 transitions. [2022-07-20 06:06:20,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 28.5) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:20,944 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 483 transitions. [2022-07-20 06:06:20,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-20 06:06:20,944 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:06:20,944 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:06:20,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-07-20 06:06:20,945 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:06:20,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:06:20,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1862074248, now seen corresponding path program 1 times [2022-07-20 06:06:20,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:06:20,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926248134] [2022-07-20 06:06:20,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:06:20,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:06:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:06:21,753 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 06:06:21,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:06:21,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926248134] [2022-07-20 06:06:21,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926248134] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:06:21,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672550559] [2022-07-20 06:06:21,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:06:21,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:06:21,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:06:21,755 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) [2022-07-20 06:06:21,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-20 06:06:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:06:21,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 120 conjunts are in the unsatisfiable core [2022-07-20 06:06:21,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:06:22,019 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 [2022-07-20 06:06:22,057 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 11 treesize of output 7 [2022-07-20 06:06:22,064 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 11 treesize of output 7 [2022-07-20 06:06:22,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:06:22,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-20 06:06:22,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:06:22,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-20 06:06:22,132 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 06:06:22,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 06:06:22,188 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 [2022-07-20 06:06:22,191 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 23 treesize of output 22 [2022-07-20 06:06:22,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:06:22,240 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 06:06:22,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 46 [2022-07-20 06:06:22,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:06:22,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-07-20 06:06:22,369 INFO L356 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2022-07-20 06:06:22,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2022-07-20 06:06:22,454 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-20 06:06:22,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 54 [2022-07-20 06:06:22,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 37 [2022-07-20 06:06:22,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 37 [2022-07-20 06:06:22,504 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-20 06:06:22,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 54 [2022-07-20 06:06:22,581 INFO L356 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-07-20 06:06:22,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-07-20 06:06:22,653 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-20 06:06:22,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 47 [2022-07-20 06:06:22,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:06:22,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2022-07-20 06:06:22,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:06:22,744 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 06:06:22,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 45 [2022-07-20 06:06:22,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:06:22,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 72 [2022-07-20 06:06:23,900 INFO L356 Elim1Store]: treesize reduction 133, result has 14.7 percent of original size [2022-07-20 06:06:23,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 20 case distinctions, treesize of input 181 treesize of output 114 [2022-07-20 06:06:23,921 INFO L356 Elim1Store]: treesize reduction 102, result has 6.4 percent of original size [2022-07-20 06:06:23,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 37 [2022-07-20 06:06:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 28 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:06:23,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:06:24,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:06:24,591 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:06:24,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 136 treesize of output 126 [2022-07-20 06:06:32,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:06:32,165 INFO L356 Elim1Store]: treesize reduction 126, result has 33.3 percent of original size [2022-07-20 06:06:32,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 587 treesize of output 321 [2022-07-20 06:06:32,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:06:32,226 INFO L356 Elim1Store]: treesize reduction 115, result has 39.2 percent of original size [2022-07-20 06:06:32,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 289 treesize of output 198 [2022-07-20 06:06:32,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:06:32,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:06:32,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:06:32,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:06:32,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:06:32,284 INFO L356 Elim1Store]: treesize reduction 104, result has 30.2 percent of original size [2022-07-20 06:06:32,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 582 treesize of output 452 [2022-07-20 06:06:32,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:06:32,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:06:32,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:06:32,322 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:06:32,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 746 treesize of output 666 [2022-07-20 06:06:32,349 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:06:32,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 802 treesize of output 724 [2022-07-20 06:06:32,368 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:06:32,369 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 468 treesize of output 460 [2022-07-20 06:06:32,403 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:06:32,404 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 518 treesize of output 504 [2022-07-20 06:06:33,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-07-20 06:06:33,595 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 06:06:33,595 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 247 treesize of output 243 [2022-07-20 06:06:33,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 106 [2022-07-20 06:06:34,455 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 06:06:34,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672550559] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:06:34,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:06:34,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 67 [2022-07-20 06:06:34,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144475732] [2022-07-20 06:06:34,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:06:34,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-20 06:06:34,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:06:34,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-20 06:06:34,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=4064, Unknown=39, NotChecked=0, Total=4422 [2022-07-20 06:06:34,457 INFO L87 Difference]: Start difference. First operand 406 states and 483 transitions. Second operand has 67 states, 67 states have (on average 2.8208955223880596) internal successors, (189), 67 states have internal predecessors, (189), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:37,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:06:37,301 INFO L93 Difference]: Finished difference Result 407 states and 484 transitions. [2022-07-20 06:06:37,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-20 06:06:37,302 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.8208955223880596) internal successors, (189), 67 states have internal predecessors, (189), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-07-20 06:06:37,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:06:37,303 INFO L225 Difference]: With dead ends: 407 [2022-07-20 06:06:37,303 INFO L226 Difference]: Without dead ends: 407 [2022-07-20 06:06:37,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 108 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1742 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=695, Invalid=5586, Unknown=39, NotChecked=0, Total=6320 [2022-07-20 06:06:37,303 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 297 mSDsluCounter, 5153 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 5380 SdHoareTripleChecker+Invalid, 1884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 736 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 06:06:37,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 5380 Invalid, 1884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1080 Invalid, 0 Unknown, 736 Unchecked, 0.6s Time] [2022-07-20 06:06:37,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-07-20 06:06:37,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2022-07-20 06:06:37,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 321 states have (on average 1.4610591900311527) internal successors, (469), 404 states have internal predecessors, (469), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:06:37,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 484 transitions. [2022-07-20 06:06:37,307 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 484 transitions. Word has length 71 [2022-07-20 06:06:37,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:06:37,308 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 484 transitions. [2022-07-20 06:06:37,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.8208955223880596) internal successors, (189), 67 states have internal predecessors, (189), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:37,308 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 484 transitions. [2022-07-20 06:06:37,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-20 06:06:37,308 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:06:37,308 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:06:37,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-20 06:06:37,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:06:37,509 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:06:37,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:06:37,509 INFO L85 PathProgramCache]: Analyzing trace with hash -808069366, now seen corresponding path program 1 times [2022-07-20 06:06:37,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:06:37,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013954596] [2022-07-20 06:06:37,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:06:37,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:06:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:06:37,536 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-20 06:06:37,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:06:37,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013954596] [2022-07-20 06:06:37,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013954596] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:06:37,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:06:37,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:06:37,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541119876] [2022-07-20 06:06:37,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:06:37,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:06:37,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:06:37,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:06:37,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:06:37,539 INFO L87 Difference]: Start difference. First operand 407 states and 484 transitions. Second operand has 3 states, 2 states have (on average 29.5) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:37,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:06:37,613 INFO L93 Difference]: Finished difference Result 403 states and 476 transitions. [2022-07-20 06:06:37,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:06:37,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 29.5) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 72 [2022-07-20 06:06:37,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:06:37,614 INFO L225 Difference]: With dead ends: 403 [2022-07-20 06:06:37,614 INFO L226 Difference]: Without dead ends: 403 [2022-07-20 06:06:37,614 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 [2022-07-20 06:06:37,615 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 42 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:06:37,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 336 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:06:37,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-07-20 06:06:37,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 403. [2022-07-20 06:06:37,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 321 states have (on average 1.4361370716510904) internal successors, (461), 400 states have internal predecessors, (461), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:06:37,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 476 transitions. [2022-07-20 06:06:37,624 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 476 transitions. Word has length 72 [2022-07-20 06:06:37,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:06:37,624 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 476 transitions. [2022-07-20 06:06:37,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 29.5) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:37,625 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 476 transitions. [2022-07-20 06:06:37,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-20 06:06:37,625 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:06:37,625 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:06:37,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-07-20 06:06:37,625 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr41REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:06:37,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:06:37,626 INFO L85 PathProgramCache]: Analyzing trace with hash -808069365, now seen corresponding path program 1 times [2022-07-20 06:06:37,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:06:37,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222373235] [2022-07-20 06:06:37,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:06:37,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:06:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:06:37,654 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-20 06:06:37,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:06:37,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222373235] [2022-07-20 06:06:37,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222373235] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:06:37,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:06:37,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:06:37,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737434186] [2022-07-20 06:06:37,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:06:37,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:06:37,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:06:37,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:06:37,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:06:37,656 INFO L87 Difference]: Start difference. First operand 403 states and 476 transitions. Second operand has 3 states, 2 states have (on average 29.5) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:37,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:06:37,748 INFO L93 Difference]: Finished difference Result 399 states and 468 transitions. [2022-07-20 06:06:37,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:06:37,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 29.5) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 72 [2022-07-20 06:06:37,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:06:37,749 INFO L225 Difference]: With dead ends: 399 [2022-07-20 06:06:37,749 INFO L226 Difference]: Without dead ends: 399 [2022-07-20 06:06:37,749 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 [2022-07-20 06:06:37,750 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 38 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:06:37,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 329 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:06:37,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-07-20 06:06:37,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 399. [2022-07-20 06:06:37,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 321 states have (on average 1.411214953271028) internal successors, (453), 396 states have internal predecessors, (453), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:06:37,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 468 transitions. [2022-07-20 06:06:37,754 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 468 transitions. Word has length 72 [2022-07-20 06:06:37,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:06:37,754 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 468 transitions. [2022-07-20 06:06:37,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 29.5) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:37,755 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 468 transitions. [2022-07-20 06:06:37,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-20 06:06:37,755 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:06:37,755 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:06:37,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-07-20 06:06:37,755 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:06:37,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:06:37,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1539639829, now seen corresponding path program 3 times [2022-07-20 06:06:37,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:06:37,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166512375] [2022-07-20 06:06:37,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:06:37,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:06:37,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:06:38,310 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:06:38,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:06:38,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166512375] [2022-07-20 06:06:38,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166512375] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:06:38,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705175602] [2022-07-20 06:06:38,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 06:06:38,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:06:38,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:06:38,312 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) [2022-07-20 06:06:38,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-20 06:06:38,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-20 06:06:38,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:06:38,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-20 06:06:38,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:06:38,631 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 [2022-07-20 06:06:38,644 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 06:06:38,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-20 06:06:38,678 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 06:06:38,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-20 06:06:38,713 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 11 treesize of output 7 [2022-07-20 06:06:38,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:06:38,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-07-20 06:06:38,828 INFO L356 Elim1Store]: treesize reduction 54, result has 45.5 percent of original size [2022-07-20 06:06:38,829 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 73 [2022-07-20 06:06:38,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-07-20 06:06:38,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-07-20 06:06:38,998 INFO L356 Elim1Store]: treesize reduction 86, result has 38.6 percent of original size [2022-07-20 06:06:38,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 58 treesize of output 96 [2022-07-20 06:06:39,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2022-07-20 06:06:39,139 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 13 treesize of output 9 [2022-07-20 06:06:39,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-07-20 06:06:39,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:06:43,173 INFO L356 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-07-20 06:06:43,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 43 [2022-07-20 06:06:45,523 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 33 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:06:45,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:06:46,004 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:06:46,004 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 36 [2022-07-20 06:06:46,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:06:46,459 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:06:46,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 72 [2022-07-20 06:06:46,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:06:46,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 526 treesize of output 480 [2022-07-20 06:06:46,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:06:46,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 354 treesize of output 342 [2022-07-20 06:06:46,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:06:46,483 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:06:46,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 484 treesize of output 362 [2022-07-20 06:06:48,450 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 16 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:06:48,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705175602] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:06:48,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:06:48,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 21] total 59 [2022-07-20 06:06:48,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685016757] [2022-07-20 06:06:48,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:06:48,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-20 06:06:48,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:06:48,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-20 06:06:48,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=3274, Unknown=4, NotChecked=0, Total=3540 [2022-07-20 06:06:48,452 INFO L87 Difference]: Start difference. First operand 399 states and 468 transitions. Second operand has 60 states, 59 states have (on average 3.389830508474576) internal successors, (200), 60 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:57,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:06:57,535 INFO L93 Difference]: Finished difference Result 500 states and 580 transitions. [2022-07-20 06:06:57,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-20 06:06:57,536 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 3.389830508474576) internal successors, (200), 60 states have internal predecessors, (200), 0 states have call successors, (0), 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 [2022-07-20 06:06:57,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:06:57,536 INFO L225 Difference]: With dead ends: 500 [2022-07-20 06:06:57,537 INFO L226 Difference]: Without dead ends: 500 [2022-07-20 06:06:57,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 129 SyntacticMatches, 13 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2130 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=1220, Invalid=6432, Unknown=4, NotChecked=0, Total=7656 [2022-07-20 06:06:57,538 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 1204 mSDsluCounter, 4437 mSDsCounter, 0 mSdLazyCounter, 2206 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1206 SdHoareTripleChecker+Valid, 4628 SdHoareTripleChecker+Invalid, 3578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1303 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:06:57,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1206 Valid, 4628 Invalid, 3578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2206 Invalid, 0 Unknown, 1303 Unchecked, 1.0s Time] [2022-07-20 06:06:57,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-07-20 06:06:57,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 403. [2022-07-20 06:06:57,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 325 states have (on average 1.4092307692307693) internal successors, (458), 400 states have internal predecessors, (458), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:06:57,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 473 transitions. [2022-07-20 06:06:57,542 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 473 transitions. Word has length 73 [2022-07-20 06:06:57,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:06:57,542 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 473 transitions. [2022-07-20 06:06:57,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 3.389830508474576) internal successors, (200), 60 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:06:57,542 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 473 transitions. [2022-07-20 06:06:57,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-20 06:06:57,542 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:06:57,543 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:06:57,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-20 06:06:57,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:06:57,759 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2022-07-20 06:06:57,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:06:57,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1539639830, now seen corresponding path program 2 times [2022-07-20 06:06:57,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:06:57,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496380654] [2022-07-20 06:06:57,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:06:57,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:06:57,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:06:58,579 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:06:58,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:06:58,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496380654] [2022-07-20 06:06:58,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496380654] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:06:58,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079337272] [2022-07-20 06:06:58,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 06:06:58,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:06:58,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:06:58,580 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) [2022-07-20 06:06:58,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-20 06:06:58,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 06:06:58,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:06:58,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-20 06:06:58,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:06:58,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 06:06:58,904 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 06:06:58,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 06:06:58,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-20 06:06:58,934 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 06:06:58,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 06:06:58,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-20 06:06:58,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 06:06:58,992 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 13 treesize of output 9 [2022-07-20 06:06:59,102 INFO L356 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2022-07-20 06:06:59,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2022-07-20 06:06:59,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-20 06:06:59,163 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 49 treesize of output 45 [2022-07-20 06:06:59,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 06:06:59,192 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 49 treesize of output 45 [2022-07-20 06:06:59,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 06:06:59,212 INFO L356 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2022-07-20 06:06:59,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2022-07-20 06:06:59,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-20 06:06:59,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 06:06:59,273 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 38 treesize of output 36 [2022-07-20 06:06:59,285 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 39 treesize of output 30 [2022-07-20 06:06:59,288 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 27 treesize of output 26 [2022-07-20 06:07:00,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:07:00,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:07:00,087 INFO L356 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-07-20 06:07:00,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 95 treesize of output 52 [2022-07-20 06:07:00,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:07:00,094 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-20 06:07:00,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2022-07-20 06:07:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 19 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:07:00,184 INFO L328 TraceCheckSpWp]: Computing backward predicates...