./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/verifythis/duplets.c --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/verifythis/duplets.c -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 ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 05:32:19,988 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 05:32:19,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 05:32:20,022 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 05:32:20,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 05:32:20,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 05:32:20,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 05:32:20,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 05:32:20,030 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 05:32:20,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 05:32:20,033 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 05:32:20,035 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 05:32:20,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 05:32:20,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 05:32:20,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 05:32:20,040 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 05:32:20,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 05:32:20,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 05:32:20,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 05:32:20,046 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 05:32:20,048 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 05:32:20,049 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 05:32:20,049 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 05:32:20,050 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 05:32:20,051 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 05:32:20,055 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 05:32:20,056 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 05:32:20,056 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 05:32:20,057 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 05:32:20,057 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 05:32:20,058 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 05:32:20,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 05:32:20,059 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 05:32:20,060 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 05:32:20,060 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 05:32:20,061 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 05:32:20,061 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 05:32:20,061 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 05:32:20,062 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 05:32:20,062 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 05:32:20,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 05:32:20,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 05:32:20,065 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-20 05:32:20,088 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 05:32:20,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 05:32:20,089 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 05:32:20,089 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 05:32:20,089 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 05:32:20,089 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 05:32:20,090 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 05:32:20,090 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 05:32:20,090 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 05:32:20,091 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 05:32:20,091 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 05:32:20,091 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 05:32:20,091 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 05:32:20,092 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 05:32:20,092 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 05:32:20,092 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 05:32:20,092 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 05:32:20,092 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 05:32:20,092 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 05:32:20,092 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 05:32:20,093 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 05:32:20,093 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 05:32:20,094 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 05:32:20,094 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 05:32:20,094 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 05:32:20,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:32:20,094 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 05:32:20,094 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 05:32:20,095 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 05:32:20,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 05:32:20,095 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 [2022-07-20 05:32:20,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 05:32:20,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 05:32:20,304 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 05:32:20,305 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 05:32:20,306 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 05:32:20,307 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/duplets.c [2022-07-20 05:32:20,365 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfa164f96/e1f78c257cb448069c9bb409c84a8e3b/FLAG10fb8cf47 [2022-07-20 05:32:20,697 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 05:32:20,698 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/duplets.c [2022-07-20 05:32:20,702 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfa164f96/e1f78c257cb448069c9bb409c84a8e3b/FLAG10fb8cf47 [2022-07-20 05:32:21,133 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfa164f96/e1f78c257cb448069c9bb409c84a8e3b [2022-07-20 05:32:21,135 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 05:32:21,136 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 05:32:21,137 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 05:32:21,137 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 05:32:21,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 05:32:21,140 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:32:21" (1/1) ... [2022-07-20 05:32:21,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6867d2c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:32:21, skipping insertion in model container [2022-07-20 05:32:21,141 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:32:21" (1/1) ... [2022-07-20 05:32:21,146 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 05:32:21,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 05:32:21,272 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/verifythis/duplets.c[485,498] [2022-07-20 05:32:21,309 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:32:21,323 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 05:32:21,332 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/verifythis/duplets.c[485,498] [2022-07-20 05:32:21,357 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:32:21,372 INFO L208 MainTranslator]: Completed translation [2022-07-20 05:32:21,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:32:21 WrapperNode [2022-07-20 05:32:21,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 05:32:21,375 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 05:32:21,375 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 05:32:21,375 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 05:32:21,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:32:21" (1/1) ... [2022-07-20 05:32:21,393 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:32:21" (1/1) ... [2022-07-20 05:32:21,418 INFO L137 Inliner]: procedures = 21, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 123 [2022-07-20 05:32:21,418 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 05:32:21,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 05:32:21,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 05:32:21,419 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 05:32:21,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:32:21" (1/1) ... [2022-07-20 05:32:21,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:32:21" (1/1) ... [2022-07-20 05:32:21,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:32:21" (1/1) ... [2022-07-20 05:32:21,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:32:21" (1/1) ... [2022-07-20 05:32:21,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:32:21" (1/1) ... [2022-07-20 05:32:21,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:32:21" (1/1) ... [2022-07-20 05:32:21,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:32:21" (1/1) ... [2022-07-20 05:32:21,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 05:32:21,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 05:32:21,451 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 05:32:21,451 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 05:32:21,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:32:21" (1/1) ... [2022-07-20 05:32:21,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:32:21,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:32:21,472 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 05:32:21,478 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 05:32:21,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 05:32:21,496 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-20 05:32:21,496 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-20 05:32:21,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 05:32:21,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 05:32:21,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 05:32:21,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 05:32:21,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 05:32:21,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 05:32:21,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 05:32:21,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-20 05:32:21,497 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-20 05:32:21,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 05:32:21,552 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 05:32:21,553 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 05:32:21,781 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 05:32:21,786 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 05:32:21,787 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-20 05:32:21,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:32:21 BoogieIcfgContainer [2022-07-20 05:32:21,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 05:32:21,789 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 05:32:21,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 05:32:21,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 05:32:21,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:32:21" (1/3) ... [2022-07-20 05:32:21,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35288bec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:32:21, skipping insertion in model container [2022-07-20 05:32:21,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:32:21" (2/3) ... [2022-07-20 05:32:21,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35288bec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:32:21, skipping insertion in model container [2022-07-20 05:32:21,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:32:21" (3/3) ... [2022-07-20 05:32:21,796 INFO L111 eAbstractionObserver]: Analyzing ICFG duplets.c [2022-07-20 05:32:21,809 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 05:32:21,809 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2022-07-20 05:32:21,856 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 05:32:21,860 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@12d558e1, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@ad4301b [2022-07-20 05:32:21,860 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2022-07-20 05:32:21,863 INFO L276 IsEmpty]: Start isEmpty. Operand has 101 states, 52 states have (on average 1.8846153846153846) internal successors, (98), 89 states have internal predecessors, (98), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-20 05:32:21,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-20 05:32:21,868 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:21,869 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:32:21,869 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:21,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:21,872 INFO L85 PathProgramCache]: Analyzing trace with hash 802624587, now seen corresponding path program 1 times [2022-07-20 05:32:21,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:21,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830825084] [2022-07-20 05:32:21,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:21,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:21,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:21,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:22,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:22,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:22,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:22,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:22,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:32:22,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:22,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830825084] [2022-07-20 05:32:22,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830825084] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:22,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:32:22,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:32:22,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91027492] [2022-07-20 05:32:22,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:22,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 05:32:22,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:22,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 05:32:22,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 05:32:22,073 INFO L87 Difference]: Start difference. First operand has 101 states, 52 states have (on average 1.8846153846153846) internal successors, (98), 89 states have internal predecessors, (98), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 05:32:22,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:22,095 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2022-07-20 05:32:22,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 05:32:22,096 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2022-07-20 05:32:22,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:22,104 INFO L225 Difference]: With dead ends: 101 [2022-07-20 05:32:22,104 INFO L226 Difference]: Without dead ends: 99 [2022-07-20 05:32:22,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 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 05:32:22,109 INFO L413 NwaCegarLoop]: 112 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, 112 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 05:32:22,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:32:22,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-20 05:32:22,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-07-20 05:32:22,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 51 states have (on average 1.803921568627451) internal successors, (92), 87 states have internal predecessors, (92), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-20 05:32:22,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 110 transitions. [2022-07-20 05:32:22,156 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 110 transitions. Word has length 26 [2022-07-20 05:32:22,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:22,156 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 110 transitions. [2022-07-20 05:32:22,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 05:32:22,157 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 110 transitions. [2022-07-20 05:32:22,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-20 05:32:22,159 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:22,159 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:32:22,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 05:32:22,159 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:22,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:22,160 INFO L85 PathProgramCache]: Analyzing trace with hash -649564341, now seen corresponding path program 1 times [2022-07-20 05:32:22,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:22,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364915064] [2022-07-20 05:32:22,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:22,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:22,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:22,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:22,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:22,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:22,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:22,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:22,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:22,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:22,293 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:32:22,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:22,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364915064] [2022-07-20 05:32:22,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364915064] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:22,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:32:22,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:32:22,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968207854] [2022-07-20 05:32:22,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:22,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:32:22,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:22,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:32:22,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:32:22,299 INFO L87 Difference]: Start difference. First operand 99 states and 110 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 05:32:22,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:22,415 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2022-07-20 05:32:22,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:32:22,415 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2022-07-20 05:32:22,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:22,416 INFO L225 Difference]: With dead ends: 97 [2022-07-20 05:32:22,417 INFO L226 Difference]: Without dead ends: 97 [2022-07-20 05:32:22,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 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 05:32:22,418 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 150 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:22,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 92 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:32:22,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-20 05:32:22,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-07-20 05:32:22,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 51 states have (on average 1.7647058823529411) internal successors, (90), 85 states have internal predecessors, (90), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-20 05:32:22,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2022-07-20 05:32:22,423 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 26 [2022-07-20 05:32:22,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:22,425 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2022-07-20 05:32:22,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 05:32:22,425 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2022-07-20 05:32:22,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-20 05:32:22,426 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:22,426 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:32:22,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 05:32:22,426 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:22,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:22,427 INFO L85 PathProgramCache]: Analyzing trace with hash -649564340, now seen corresponding path program 1 times [2022-07-20 05:32:22,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:22,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511988278] [2022-07-20 05:32:22,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:22,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:22,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:22,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:22,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:22,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:22,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:22,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:22,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:22,601 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 05:32:22,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:22,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511988278] [2022-07-20 05:32:22,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511988278] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:32:22,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168135499] [2022-07-20 05:32:22,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:22,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:32:22,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:32:22,606 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 05:32:22,606 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 05:32:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:22,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-20 05:32:22,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:32:22,724 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 05:32:22,921 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 05:32:22,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:32:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 05:32:23,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168135499] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:32:23,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:32:23,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 11 [2022-07-20 05:32:23,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912538931] [2022-07-20 05:32:23,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:32:23,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 05:32:23,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:23,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 05:32:23,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-20 05:32:23,178 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-20 05:32:23,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:23,335 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2022-07-20 05:32:23,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 05:32:23,335 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) Word has length 26 [2022-07-20 05:32:23,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:23,336 INFO L225 Difference]: With dead ends: 100 [2022-07-20 05:32:23,336 INFO L226 Difference]: Without dead ends: 100 [2022-07-20 05:32:23,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-07-20 05:32:23,337 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 16 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:23,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 474 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 114 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-07-20 05:32:23,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-20 05:32:23,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-07-20 05:32:23,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 54 states have (on average 1.7037037037037037) internal successors, (92), 87 states have internal predecessors, (92), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-20 05:32:23,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2022-07-20 05:32:23,348 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 26 [2022-07-20 05:32:23,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:23,349 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2022-07-20 05:32:23,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-20 05:32:23,349 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2022-07-20 05:32:23,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-20 05:32:23,350 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:23,350 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:32:23,369 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 05:32:23,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:32:23,564 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:23,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:23,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1338341894, now seen corresponding path program 1 times [2022-07-20 05:32:23,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:23,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243645538] [2022-07-20 05:32:23,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:23,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:23,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:23,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:23,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:23,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:23,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:23,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 05:32:23,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:23,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243645538] [2022-07-20 05:32:23,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243645538] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:32:23,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911573158] [2022-07-20 05:32:23,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:23,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:32:23,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:32:23,682 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 05:32:23,683 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 05:32:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:23,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-20 05:32:23,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:32:23,742 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 05:32:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:32:23,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:32:23,991 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 05:32:23,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911573158] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:32:23,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:32:23,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 11 [2022-07-20 05:32:23,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978331228] [2022-07-20 05:32:23,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:32:23,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 05:32:23,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:23,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 05:32:23,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-20 05:32:23,993 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 12 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 12 states have internal predecessors, (23), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-20 05:32:24,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:24,165 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2022-07-20 05:32:24,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 05:32:24,166 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 12 states have internal predecessors, (23), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 27 [2022-07-20 05:32:24,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:24,167 INFO L225 Difference]: With dead ends: 103 [2022-07-20 05:32:24,167 INFO L226 Difference]: Without dead ends: 103 [2022-07-20 05:32:24,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-07-20 05:32:24,168 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 10 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:24,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 511 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 179 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-07-20 05:32:24,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-20 05:32:24,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-07-20 05:32:24,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 89 states have internal predecessors, (94), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-20 05:32:24,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 112 transitions. [2022-07-20 05:32:24,172 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 112 transitions. Word has length 27 [2022-07-20 05:32:24,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:24,172 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 112 transitions. [2022-07-20 05:32:24,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 12 states have internal predecessors, (23), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-20 05:32:24,172 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 112 transitions. [2022-07-20 05:32:24,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-20 05:32:24,173 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:24,173 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:32:24,190 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 05:32:24,379 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,SelfDestructingSolverStorable3 [2022-07-20 05:32:24,380 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:24,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:24,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1665569650, now seen corresponding path program 1 times [2022-07-20 05:32:24,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:24,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525674224] [2022-07-20 05:32:24,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:24,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:24,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:24,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:24,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:24,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:24,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:24,487 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:32:24,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:24,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525674224] [2022-07-20 05:32:24,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525674224] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:24,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:32:24,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:32:24,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784286763] [2022-07-20 05:32:24,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:24,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 05:32:24,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:24,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 05:32:24,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:32:24,488 INFO L87 Difference]: Start difference. First operand 103 states and 112 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 05:32:24,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:24,566 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2022-07-20 05:32:24,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:32:24,567 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2022-07-20 05:32:24,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:24,568 INFO L225 Difference]: With dead ends: 98 [2022-07-20 05:32:24,568 INFO L226 Difference]: Without dead ends: 98 [2022-07-20 05:32:24,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-20 05:32:24,568 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 265 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:24,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 97 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:32:24,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-20 05:32:24,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-07-20 05:32:24,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 57 states have (on average 1.5614035087719298) internal successors, (89), 84 states have internal predecessors, (89), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-20 05:32:24,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2022-07-20 05:32:24,573 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 31 [2022-07-20 05:32:24,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:24,573 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2022-07-20 05:32:24,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 05:32:24,573 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2022-07-20 05:32:24,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-20 05:32:24,574 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:24,574 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:32:24,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 05:32:24,574 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:24,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:24,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1665569649, now seen corresponding path program 1 times [2022-07-20 05:32:24,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:24,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048080925] [2022-07-20 05:32:24,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:24,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:24,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:24,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:24,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:24,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:24,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:24,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:32:24,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:24,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048080925] [2022-07-20 05:32:24,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048080925] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:24,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:32:24,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 05:32:24,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832761578] [2022-07-20 05:32:24,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:24,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:32:24,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:24,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:32:24,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:32:24,662 INFO L87 Difference]: Start difference. First operand 98 states and 107 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 05:32:24,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:24,832 INFO L93 Difference]: Finished difference Result 163 states and 181 transitions. [2022-07-20 05:32:24,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:32:24,833 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2022-07-20 05:32:24,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:24,833 INFO L225 Difference]: With dead ends: 163 [2022-07-20 05:32:24,834 INFO L226 Difference]: Without dead ends: 163 [2022-07-20 05:32:24,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-20 05:32:24,834 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 323 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:24,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 162 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:32:24,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-07-20 05:32:24,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 103. [2022-07-20 05:32:24,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 63 states have (on average 1.5555555555555556) internal successors, (98), 89 states have internal predecessors, (98), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-20 05:32:24,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 116 transitions. [2022-07-20 05:32:24,838 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 116 transitions. Word has length 31 [2022-07-20 05:32:24,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:24,838 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 116 transitions. [2022-07-20 05:32:24,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 05:32:24,838 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 116 transitions. [2022-07-20 05:32:24,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-20 05:32:24,839 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:24,839 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:32:24,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 05:32:24,839 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:24,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:24,840 INFO L85 PathProgramCache]: Analyzing trace with hash -93051589, now seen corresponding path program 1 times [2022-07-20 05:32:24,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:24,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586308157] [2022-07-20 05:32:24,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:24,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:24,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:24,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:24,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:24,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:24,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:24,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:24,992 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:32:24,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:24,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586308157] [2022-07-20 05:32:24,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586308157] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:24,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:32:24,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-20 05:32:24,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687310117] [2022-07-20 05:32:24,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:24,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 05:32:24,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:24,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 05:32:24,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:32:24,994 INFO L87 Difference]: Start difference. First operand 103 states and 116 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 05:32:25,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:25,430 INFO L93 Difference]: Finished difference Result 209 states and 233 transitions. [2022-07-20 05:32:25,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:32:25,430 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-07-20 05:32:25,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:25,431 INFO L225 Difference]: With dead ends: 209 [2022-07-20 05:32:25,431 INFO L226 Difference]: Without dead ends: 209 [2022-07-20 05:32:25,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-07-20 05:32:25,432 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 467 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:25,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 196 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 05:32:25,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-07-20 05:32:25,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 102. [2022-07-20 05:32:25,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 88 states have internal predecessors, (96), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-20 05:32:25,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 114 transitions. [2022-07-20 05:32:25,436 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 114 transitions. Word has length 32 [2022-07-20 05:32:25,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:25,436 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 114 transitions. [2022-07-20 05:32:25,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 05:32:25,437 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 114 transitions. [2022-07-20 05:32:25,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-20 05:32:25,437 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:25,437 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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 05:32:25,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 05:32:25,437 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:25,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:25,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1505969179, now seen corresponding path program 1 times [2022-07-20 05:32:25,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:25,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937519676] [2022-07-20 05:32:25,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:25,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:25,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:25,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:25,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:25,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:25,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:25,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:25,485 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:32:25,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:25,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937519676] [2022-07-20 05:32:25,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937519676] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:25,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:32:25,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 05:32:25,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116949872] [2022-07-20 05:32:25,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:25,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:32:25,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:25,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:32:25,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:32:25,487 INFO L87 Difference]: Start difference. First operand 102 states and 114 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 05:32:25,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:25,641 INFO L93 Difference]: Finished difference Result 159 states and 176 transitions. [2022-07-20 05:32:25,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:32:25,641 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-07-20 05:32:25,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:25,642 INFO L225 Difference]: With dead ends: 159 [2022-07-20 05:32:25,642 INFO L226 Difference]: Without dead ends: 159 [2022-07-20 05:32:25,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:32:25,643 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 146 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:25,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 454 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:32:25,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-20 05:32:25,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 102. [2022-07-20 05:32:25,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 63 states have (on average 1.507936507936508) internal successors, (95), 88 states have internal predecessors, (95), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-20 05:32:25,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 113 transitions. [2022-07-20 05:32:25,647 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 113 transitions. Word has length 35 [2022-07-20 05:32:25,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:25,647 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 113 transitions. [2022-07-20 05:32:25,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 05:32:25,647 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 113 transitions. [2022-07-20 05:32:25,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-20 05:32:25,648 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:25,648 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:32:25,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-20 05:32:25,648 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:25,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:25,649 INFO L85 PathProgramCache]: Analyzing trace with hash 770561975, now seen corresponding path program 1 times [2022-07-20 05:32:25,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:25,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916315840] [2022-07-20 05:32:25,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:25,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:25,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:25,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:25,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:25,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:25,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:25,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:25,678 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:32:25,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:25,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916315840] [2022-07-20 05:32:25,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916315840] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:32:25,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947841290] [2022-07-20 05:32:25,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:25,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:32:25,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:32:25,680 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 05:32:25,689 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 05:32:25,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:25,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 05:32:25,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:32:25,750 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:32:25,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:32:25,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947841290] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:25,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:32:25,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 6 [2022-07-20 05:32:25,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557272454] [2022-07-20 05:32:25,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:25,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:32:25,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:25,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:32:25,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:32:25,752 INFO L87 Difference]: Start difference. First operand 102 states and 113 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 05:32:25,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:25,807 INFO L93 Difference]: Finished difference Result 271 states and 304 transitions. [2022-07-20 05:32:25,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:32:25,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2022-07-20 05:32:25,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:25,809 INFO L225 Difference]: With dead ends: 271 [2022-07-20 05:32:25,809 INFO L226 Difference]: Without dead ends: 271 [2022-07-20 05:32:25,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-20 05:32:25,809 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 293 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:25,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 318 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:32:25,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-07-20 05:32:25,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 106. [2022-07-20 05:32:25,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 67 states have (on average 1.507462686567164) internal successors, (101), 92 states have internal predecessors, (101), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-20 05:32:25,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 119 transitions. [2022-07-20 05:32:25,813 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 119 transitions. Word has length 34 [2022-07-20 05:32:25,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:25,814 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 119 transitions. [2022-07-20 05:32:25,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 05:32:25,814 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 119 transitions. [2022-07-20 05:32:25,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-20 05:32:25,814 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:25,814 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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 05:32:25,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-20 05:32:26,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:32:26,022 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:26,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:26,023 INFO L85 PathProgramCache]: Analyzing trace with hash 771735643, now seen corresponding path program 1 times [2022-07-20 05:32:26,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:26,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325849391] [2022-07-20 05:32:26,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:26,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:26,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:26,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:26,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:26,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:26,046 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:32:26,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:26,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325849391] [2022-07-20 05:32:26,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325849391] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:26,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:32:26,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:32:26,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445931907] [2022-07-20 05:32:26,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:26,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:32:26,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:26,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:32:26,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:32:26,047 INFO L87 Difference]: Start difference. First operand 106 states and 119 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 05:32:26,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:26,072 INFO L93 Difference]: Finished difference Result 105 states and 118 transitions. [2022-07-20 05:32:26,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:32:26,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2022-07-20 05:32:26,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:26,073 INFO L225 Difference]: With dead ends: 105 [2022-07-20 05:32:26,073 INFO L226 Difference]: Without dead ends: 105 [2022-07-20 05:32:26,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 05:32:26,073 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 57 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:26,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 91 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:32:26,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-20 05:32:26,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-07-20 05:32:26,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 67 states have (on average 1.492537313432836) internal successors, (100), 91 states have internal predecessors, (100), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-20 05:32:26,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 118 transitions. [2022-07-20 05:32:26,076 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 118 transitions. Word has length 34 [2022-07-20 05:32:26,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:26,076 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 118 transitions. [2022-07-20 05:32:26,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 05:32:26,077 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 118 transitions. [2022-07-20 05:32:26,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-20 05:32:26,077 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:26,077 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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 05:32:26,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-20 05:32:26,077 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:26,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:26,077 INFO L85 PathProgramCache]: Analyzing trace with hash 771735644, now seen corresponding path program 1 times [2022-07-20 05:32:26,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:26,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009802955] [2022-07-20 05:32:26,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:26,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:26,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:26,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:26,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:26,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:26,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:26,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:26,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:26,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:26,135 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:32:26,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:26,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009802955] [2022-07-20 05:32:26,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009802955] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:26,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:32:26,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:32:26,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389340855] [2022-07-20 05:32:26,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:26,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:32:26,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:26,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:32:26,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:32:26,143 INFO L87 Difference]: Start difference. First operand 105 states and 118 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 05:32:26,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:26,169 INFO L93 Difference]: Finished difference Result 104 states and 117 transitions. [2022-07-20 05:32:26,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:32:26,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2022-07-20 05:32:26,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:26,170 INFO L225 Difference]: With dead ends: 104 [2022-07-20 05:32:26,170 INFO L226 Difference]: Without dead ends: 104 [2022-07-20 05:32:26,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 05:32:26,170 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 58 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:26,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 89 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:32:26,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-20 05:32:26,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-07-20 05:32:26,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 67 states have (on average 1.4776119402985075) internal successors, (99), 90 states have internal predecessors, (99), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-20 05:32:26,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2022-07-20 05:32:26,173 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 34 [2022-07-20 05:32:26,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:26,173 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2022-07-20 05:32:26,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 05:32:26,173 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2022-07-20 05:32:26,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-20 05:32:26,174 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:26,174 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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 05:32:26,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-20 05:32:26,174 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:26,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:26,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1845998826, now seen corresponding path program 1 times [2022-07-20 05:32:26,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:26,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069177210] [2022-07-20 05:32:26,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:26,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:26,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:26,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:26,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:26,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:26,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:26,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:26,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:26,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:32:26,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:26,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069177210] [2022-07-20 05:32:26,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069177210] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:26,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:32:26,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:32:26,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587505181] [2022-07-20 05:32:26,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:26,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:32:26,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:26,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:32:26,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:32:26,196 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 05:32:26,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:26,218 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2022-07-20 05:32:26,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:32:26,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-07-20 05:32:26,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:26,219 INFO L225 Difference]: With dead ends: 103 [2022-07-20 05:32:26,219 INFO L226 Difference]: Without dead ends: 103 [2022-07-20 05:32:26,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 05:32:26,219 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 54 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:26,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 90 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:32:26,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-20 05:32:26,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-07-20 05:32:26,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 67 states have (on average 1.462686567164179) internal successors, (98), 89 states have internal predecessors, (98), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-20 05:32:26,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 116 transitions. [2022-07-20 05:32:26,222 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 116 transitions. Word has length 35 [2022-07-20 05:32:26,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:26,222 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 116 transitions. [2022-07-20 05:32:26,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 05:32:26,222 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 116 transitions. [2022-07-20 05:32:26,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-20 05:32:26,222 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:26,223 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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 05:32:26,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-20 05:32:26,223 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:26,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:26,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1845998825, now seen corresponding path program 1 times [2022-07-20 05:32:26,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:26,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514063753] [2022-07-20 05:32:26,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:26,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:26,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:26,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:26,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:26,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:26,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:26,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:26,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:26,246 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:32:26,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:26,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514063753] [2022-07-20 05:32:26,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514063753] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:26,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:32:26,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:32:26,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644881939] [2022-07-20 05:32:26,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:26,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:32:26,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:26,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:32:26,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:32:26,248 INFO L87 Difference]: Start difference. First operand 103 states and 116 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 05:32:26,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:26,274 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2022-07-20 05:32:26,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:32:26,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-07-20 05:32:26,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:26,275 INFO L225 Difference]: With dead ends: 102 [2022-07-20 05:32:26,275 INFO L226 Difference]: Without dead ends: 102 [2022-07-20 05:32:26,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 05:32:26,276 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 55 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:26,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 88 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:32:26,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-20 05:32:26,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-07-20 05:32:26,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 67 states have (on average 1.4477611940298507) internal successors, (97), 88 states have internal predecessors, (97), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-20 05:32:26,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2022-07-20 05:32:26,278 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 35 [2022-07-20 05:32:26,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:26,278 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2022-07-20 05:32:26,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 05:32:26,278 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2022-07-20 05:32:26,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-20 05:32:26,279 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:26,279 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 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 05:32:26,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-20 05:32:26,279 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:26,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:26,279 INFO L85 PathProgramCache]: Analyzing trace with hash 385735491, now seen corresponding path program 1 times [2022-07-20 05:32:26,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:26,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818092776] [2022-07-20 05:32:26,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:26,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:26,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:26,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:26,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:26,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:26,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:26,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:26,457 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 05:32:26,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:26,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818092776] [2022-07-20 05:32:26,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818092776] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:26,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:32:26,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-20 05:32:26,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643860200] [2022-07-20 05:32:26,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:26,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 05:32:26,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:26,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 05:32:26,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-07-20 05:32:26,459 INFO L87 Difference]: Start difference. First operand 102 states and 115 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-20 05:32:26,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:26,974 INFO L93 Difference]: Finished difference Result 155 states and 173 transitions. [2022-07-20 05:32:26,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 05:32:26,974 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-07-20 05:32:26,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:26,975 INFO L225 Difference]: With dead ends: 155 [2022-07-20 05:32:26,975 INFO L226 Difference]: Without dead ends: 155 [2022-07-20 05:32:26,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-07-20 05:32:26,975 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 590 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:26,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [590 Valid, 360 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:32:26,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-07-20 05:32:26,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 102. [2022-07-20 05:32:26,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 67 states have (on average 1.4328358208955223) internal successors, (96), 88 states have internal predecessors, (96), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-20 05:32:26,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 114 transitions. [2022-07-20 05:32:26,978 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 114 transitions. Word has length 38 [2022-07-20 05:32:26,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:26,978 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 114 transitions. [2022-07-20 05:32:26,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-20 05:32:26,978 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 114 transitions. [2022-07-20 05:32:26,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-20 05:32:26,979 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:26,979 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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 05:32:26,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-20 05:32:26,979 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:26,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:26,979 INFO L85 PathProgramCache]: Analyzing trace with hash -462248216, now seen corresponding path program 1 times [2022-07-20 05:32:26,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:26,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373441556] [2022-07-20 05:32:26,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:26,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:26,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:27,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:27,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:27,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:27,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:27,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:27,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:27,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:27,028 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:32:27,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:27,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373441556] [2022-07-20 05:32:27,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373441556] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:32:27,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415750017] [2022-07-20 05:32:27,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:27,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:32:27,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:32:27,030 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 05:32:27,031 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 05:32:27,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:27,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 05:32:27,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:32:27,101 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:32:27,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:32:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:32:27,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415750017] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:32:27,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:32:27,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2022-07-20 05:32:27,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163627455] [2022-07-20 05:32:27,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:32:27,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:32:27,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:27,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:32:27,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:32:27,125 INFO L87 Difference]: Start difference. First operand 102 states and 114 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 05:32:27,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:27,234 INFO L93 Difference]: Finished difference Result 330 states and 373 transitions. [2022-07-20 05:32:27,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 05:32:27,234 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2022-07-20 05:32:27,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:27,235 INFO L225 Difference]: With dead ends: 330 [2022-07-20 05:32:27,235 INFO L226 Difference]: Without dead ends: 330 [2022-07-20 05:32:27,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:32:27,238 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 414 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:27,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 488 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:32:27,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-07-20 05:32:27,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 115. [2022-07-20 05:32:27,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 80 states have (on average 1.45) internal successors, (116), 101 states have internal predecessors, (116), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-20 05:32:27,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2022-07-20 05:32:27,245 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 39 [2022-07-20 05:32:27,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:27,245 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2022-07-20 05:32:27,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 05:32:27,246 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2022-07-20 05:32:27,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-20 05:32:27,246 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:27,246 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 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 05:32:27,263 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 05:32:27,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-20 05:32:27,448 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:27,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:27,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1532500018, now seen corresponding path program 1 times [2022-07-20 05:32:27,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:27,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435605935] [2022-07-20 05:32:27,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:27,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:27,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:27,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:27,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:27,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:27,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:27,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:32:27,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:27,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435605935] [2022-07-20 05:32:27,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435605935] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:27,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:32:27,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 05:32:27,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536311069] [2022-07-20 05:32:27,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:27,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 05:32:27,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:27,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 05:32:27,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:32:27,489 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 05:32:27,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:27,529 INFO L93 Difference]: Finished difference Result 168 states and 192 transitions. [2022-07-20 05:32:27,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:32:27,529 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2022-07-20 05:32:27,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:27,530 INFO L225 Difference]: With dead ends: 168 [2022-07-20 05:32:27,530 INFO L226 Difference]: Without dead ends: 168 [2022-07-20 05:32:27,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-20 05:32:27,531 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 94 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:27,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 460 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:32:27,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-20 05:32:27,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 121. [2022-07-20 05:32:27,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 84 states have (on average 1.4285714285714286) internal successors, (120), 106 states have internal predecessors, (120), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-20 05:32:27,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2022-07-20 05:32:27,536 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 41 [2022-07-20 05:32:27,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:27,537 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2022-07-20 05:32:27,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 05:32:27,537 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2022-07-20 05:32:27,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-20 05:32:27,537 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:27,537 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 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 05:32:27,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-20 05:32:27,538 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:27,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:27,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1396025844, now seen corresponding path program 1 times [2022-07-20 05:32:27,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:27,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068251561] [2022-07-20 05:32:27,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:27,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:27,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:27,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:27,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:27,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:27,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:32:27,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:27,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068251561] [2022-07-20 05:32:27,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068251561] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:32:27,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722712744] [2022-07-20 05:32:27,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:27,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:32:27,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:32:27,567 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 05:32:27,568 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 05:32:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:27,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 05:32:27,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:32:27,636 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:32:27,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:32:27,653 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:32:27,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722712744] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:32:27,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:32:27,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-07-20 05:32:27,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519967693] [2022-07-20 05:32:27,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:32:27,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:32:27,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:27,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:32:27,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:32:27,655 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 05:32:27,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:27,684 INFO L93 Difference]: Finished difference Result 168 states and 190 transitions. [2022-07-20 05:32:27,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:32:27,685 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2022-07-20 05:32:27,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:27,686 INFO L225 Difference]: With dead ends: 168 [2022-07-20 05:32:27,686 INFO L226 Difference]: Without dead ends: 168 [2022-07-20 05:32:27,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:32:27,686 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 114 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:27,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 347 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:32:27,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-20 05:32:27,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 121. [2022-07-20 05:32:27,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 84 states have (on average 1.4047619047619047) internal successors, (118), 106 states have internal predecessors, (118), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-20 05:32:27,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 138 transitions. [2022-07-20 05:32:27,689 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 138 transitions. Word has length 43 [2022-07-20 05:32:27,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:27,690 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 138 transitions. [2022-07-20 05:32:27,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 05:32:27,690 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 138 transitions. [2022-07-20 05:32:27,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-20 05:32:27,690 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:27,690 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 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 05:32:27,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 05:32:27,899 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,SelfDestructingSolverStorable16 [2022-07-20 05:32:27,899 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:27,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:27,900 INFO L85 PathProgramCache]: Analyzing trace with hash -441136327, now seen corresponding path program 1 times [2022-07-20 05:32:27,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:27,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268889833] [2022-07-20 05:32:27,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:27,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:27,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:27,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:27,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:27,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:27,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:27,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:27,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:27,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:27,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-20 05:32:27,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:27,958 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:32:27,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:27,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268889833] [2022-07-20 05:32:27,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268889833] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:27,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:32:27,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:32:27,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017663668] [2022-07-20 05:32:27,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:27,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:32:27,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:27,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:32:27,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:32:27,959 INFO L87 Difference]: Start difference. First operand 121 states and 138 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 05:32:28,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:28,002 INFO L93 Difference]: Finished difference Result 117 states and 134 transitions. [2022-07-20 05:32:28,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:32:28,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2022-07-20 05:32:28,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:28,003 INFO L225 Difference]: With dead ends: 117 [2022-07-20 05:32:28,003 INFO L226 Difference]: Without dead ends: 117 [2022-07-20 05:32:28,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 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 05:32:28,004 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 101 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:28,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 114 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:32:28,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-20 05:32:28,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-07-20 05:32:28,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 102 states have internal predecessors, (114), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-20 05:32:28,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 134 transitions. [2022-07-20 05:32:28,007 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 134 transitions. Word has length 43 [2022-07-20 05:32:28,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:28,007 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 134 transitions. [2022-07-20 05:32:28,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 05:32:28,008 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 134 transitions. [2022-07-20 05:32:28,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-20 05:32:28,008 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:28,008 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 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 05:32:28,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-20 05:32:28,008 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:28,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:28,009 INFO L85 PathProgramCache]: Analyzing trace with hash -441136326, now seen corresponding path program 1 times [2022-07-20 05:32:28,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:28,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134710382] [2022-07-20 05:32:28,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:28,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:28,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:28,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:28,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:28,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:28,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-20 05:32:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:28,043 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:32:28,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:28,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134710382] [2022-07-20 05:32:28,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134710382] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:28,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:32:28,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:32:28,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620940943] [2022-07-20 05:32:28,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:28,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:32:28,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:28,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:32:28,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:32:28,045 INFO L87 Difference]: Start difference. First operand 117 states and 134 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 05:32:28,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:28,098 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2022-07-20 05:32:28,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:32:28,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2022-07-20 05:32:28,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:28,099 INFO L225 Difference]: With dead ends: 113 [2022-07-20 05:32:28,099 INFO L226 Difference]: Without dead ends: 113 [2022-07-20 05:32:28,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 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 05:32:28,099 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 93 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:28,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 102 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:32:28,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-20 05:32:28,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-07-20 05:32:28,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 84 states have (on average 1.3095238095238095) internal successors, (110), 98 states have internal predecessors, (110), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-20 05:32:28,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 130 transitions. [2022-07-20 05:32:28,102 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 130 transitions. Word has length 43 [2022-07-20 05:32:28,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:28,103 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 130 transitions. [2022-07-20 05:32:28,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 05:32:28,103 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 130 transitions. [2022-07-20 05:32:28,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-20 05:32:28,103 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:28,103 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:32:28,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-20 05:32:28,103 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:28,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:28,104 INFO L85 PathProgramCache]: Analyzing trace with hash 791981655, now seen corresponding path program 2 times [2022-07-20 05:32:28,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:28,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938317671] [2022-07-20 05:32:28,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:28,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:28,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:28,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:28,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:28,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:28,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:28,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:28,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:28,177 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:32:28,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:28,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938317671] [2022-07-20 05:32:28,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938317671] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:32:28,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833008937] [2022-07-20 05:32:28,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:32:28,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:32:28,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:32:28,179 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 05:32:28,180 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 05:32:28,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:32:28,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:32:28,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 05:32:28,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:32:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-20 05:32:28,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:32:28,599 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 46 treesize of output 42 [2022-07-20 05:32:28,685 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-20 05:32:28,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833008937] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:32:28,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:32:28,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 26 [2022-07-20 05:32:28,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884948385] [2022-07-20 05:32:28,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:32:28,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-20 05:32:28,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:28,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-20 05:32:28,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-07-20 05:32:28,687 INFO L87 Difference]: Start difference. First operand 113 states and 130 transitions. Second operand has 27 states, 26 states have (on average 2.576923076923077) internal successors, (67), 27 states have internal predecessors, (67), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-20 05:32:29,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:29,734 INFO L93 Difference]: Finished difference Result 345 states and 394 transitions. [2022-07-20 05:32:29,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-20 05:32:29,734 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.576923076923077) internal successors, (67), 27 states have internal predecessors, (67), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 44 [2022-07-20 05:32:29,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:29,736 INFO L225 Difference]: With dead ends: 345 [2022-07-20 05:32:29,736 INFO L226 Difference]: Without dead ends: 345 [2022-07-20 05:32:29,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=521, Invalid=1459, Unknown=0, NotChecked=0, Total=1980 [2022-07-20 05:32:29,737 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 1292 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1292 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:29,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1292 Valid, 940 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 05:32:29,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-07-20 05:32:29,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 101. [2022-07-20 05:32:29,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 86 states have internal predecessors, (92), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-20 05:32:29,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2022-07-20 05:32:29,741 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 44 [2022-07-20 05:32:29,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:29,741 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2022-07-20 05:32:29,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.576923076923077) internal successors, (67), 27 states have internal predecessors, (67), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-20 05:32:29,742 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2022-07-20 05:32:29,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-20 05:32:29,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:29,742 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-07-20 05:32:29,758 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 05:32:29,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:32:29,959 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:29,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:29,959 INFO L85 PathProgramCache]: Analyzing trace with hash 2123889354, now seen corresponding path program 2 times [2022-07-20 05:32:29,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:29,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095808113] [2022-07-20 05:32:29,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:29,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:29,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:30,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:30,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:30,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:30,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:30,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:30,281 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-20 05:32:30,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:30,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095808113] [2022-07-20 05:32:30,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095808113] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:32:30,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740010283] [2022-07-20 05:32:30,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:32:30,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:32:30,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:32:30,283 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 05:32:30,284 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 05:32:30,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:32:30,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:32:30,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-20 05:32:30,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:32:30,353 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 05:32:30,447 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 15 treesize of output 11 [2022-07-20 05:32:30,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:32:30,491 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 23 [2022-07-20 05:32:30,494 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 28 treesize of output 22 [2022-07-20 05:32:30,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:32:30,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:32:30,718 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:32:30,719 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 62 [2022-07-20 05:32:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-20 05:32:30,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:32:31,164 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-20 05:32:31,164 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 515 treesize of output 447 [2022-07-20 05:32:32,543 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-20 05:32:32,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740010283] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:32:32,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:32:32,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-07-20 05:32:32,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302808286] [2022-07-20 05:32:32,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:32:32,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-20 05:32:32,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:32,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-20 05:32:32,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1273, Unknown=0, NotChecked=0, Total=1406 [2022-07-20 05:32:32,545 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand has 38 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 38 states have internal predecessors, (58), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-20 05:32:33,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:33,071 INFO L93 Difference]: Finished difference Result 150 states and 168 transitions. [2022-07-20 05:32:33,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 05:32:33,072 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 38 states have internal predecessors, (58), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) Word has length 46 [2022-07-20 05:32:33,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:33,072 INFO L225 Difference]: With dead ends: 150 [2022-07-20 05:32:33,072 INFO L226 Difference]: Without dead ends: 150 [2022-07-20 05:32:33,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=234, Invalid=2022, Unknown=0, NotChecked=0, Total=2256 [2022-07-20 05:32:33,073 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 88 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1128 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:33,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 1128 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 416 Invalid, 0 Unknown, 147 Unchecked, 0.2s Time] [2022-07-20 05:32:33,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-20 05:32:33,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 106. [2022-07-20 05:32:33,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 79 states have (on average 1.240506329113924) internal successors, (98), 91 states have internal predecessors, (98), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-20 05:32:33,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 118 transitions. [2022-07-20 05:32:33,076 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 118 transitions. Word has length 46 [2022-07-20 05:32:33,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:33,077 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 118 transitions. [2022-07-20 05:32:33,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 38 states have internal predecessors, (58), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-20 05:32:33,077 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 118 transitions. [2022-07-20 05:32:33,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-20 05:32:33,077 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:33,077 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:32:33,096 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 05:32:33,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:32:33,283 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:33,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:33,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1818294190, now seen corresponding path program 1 times [2022-07-20 05:32:33,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:33,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387690492] [2022-07-20 05:32:33,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:33,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:33,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:33,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:33,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:33,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:33,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:33,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:33,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:33,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:33,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-20 05:32:33,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:32:33,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:33,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387690492] [2022-07-20 05:32:33,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387690492] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:33,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:32:33,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-20 05:32:33,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867170653] [2022-07-20 05:32:33,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:33,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 05:32:33,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:33,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 05:32:33,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-20 05:32:33,378 INFO L87 Difference]: Start difference. First operand 106 states and 118 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 05:32:33,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:33,608 INFO L93 Difference]: Finished difference Result 191 states and 216 transitions. [2022-07-20 05:32:33,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 05:32:33,616 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2022-07-20 05:32:33,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:33,617 INFO L225 Difference]: With dead ends: 191 [2022-07-20 05:32:33,617 INFO L226 Difference]: Without dead ends: 191 [2022-07-20 05:32:33,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-07-20 05:32:33,617 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 160 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:33,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 502 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:32:33,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-07-20 05:32:33,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 119. [2022-07-20 05:32:33,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 91 states have (on average 1.2307692307692308) internal successors, (112), 103 states have internal predecessors, (112), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-20 05:32:33,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 134 transitions. [2022-07-20 05:32:33,622 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 134 transitions. Word has length 49 [2022-07-20 05:32:33,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:33,622 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 134 transitions. [2022-07-20 05:32:33,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 05:32:33,622 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 134 transitions. [2022-07-20 05:32:33,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-20 05:32:33,623 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:33,623 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:32:33,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-20 05:32:33,623 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:33,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:33,623 INFO L85 PathProgramCache]: Analyzing trace with hash 103710603, now seen corresponding path program 1 times [2022-07-20 05:32:33,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:33,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450365031] [2022-07-20 05:32:33,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:33,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:33,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:33,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:33,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:33,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:33,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:33,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:33,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-20 05:32:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:33,823 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:32:33,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:33,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450365031] [2022-07-20 05:32:33,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450365031] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:32:33,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412818075] [2022-07-20 05:32:33,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:33,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:32:33,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:32:33,825 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 05:32:33,826 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 05:32:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:33,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-20 05:32:33,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:32:33,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:32:34,009 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 05:32:34,030 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 05:32:34,068 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 05:32:34,101 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:32:34,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:32:34,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412818075] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:34,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:32:34,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [16] total 23 [2022-07-20 05:32:34,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054610206] [2022-07-20 05:32:34,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:34,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 05:32:34,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:34,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 05:32:34,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2022-07-20 05:32:34,102 INFO L87 Difference]: Start difference. First operand 119 states and 134 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 05:32:34,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:34,341 INFO L93 Difference]: Finished difference Result 162 states and 182 transitions. [2022-07-20 05:32:34,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 05:32:34,341 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2022-07-20 05:32:34,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:34,342 INFO L225 Difference]: With dead ends: 162 [2022-07-20 05:32:34,342 INFO L226 Difference]: Without dead ends: 162 [2022-07-20 05:32:34,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-07-20 05:32:34,343 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 236 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:34,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 456 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:32:34,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-07-20 05:32:34,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 129. [2022-07-20 05:32:34,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 111 states have internal predecessors, (120), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-20 05:32:34,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 144 transitions. [2022-07-20 05:32:34,346 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 144 transitions. Word has length 51 [2022-07-20 05:32:34,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:34,346 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 144 transitions. [2022-07-20 05:32:34,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 05:32:34,346 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 144 transitions. [2022-07-20 05:32:34,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-20 05:32:34,346 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:34,346 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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 05:32:34,364 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 05:32:34,559 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,SelfDestructingSolverStorable22 [2022-07-20 05:32:34,559 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:34,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:34,560 INFO L85 PathProgramCache]: Analyzing trace with hash 678594683, now seen corresponding path program 3 times [2022-07-20 05:32:34,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:34,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712326069] [2022-07-20 05:32:34,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:34,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:34,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:34,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:34,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:34,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:34,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:34,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:32:34,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:34,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712326069] [2022-07-20 05:32:34,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712326069] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:32:34,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758451731] [2022-07-20 05:32:34,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:32:34,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:32:34,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:32:34,618 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 05:32:34,618 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 05:32:34,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-20 05:32:34,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:32:34,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 05:32:34,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:32:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:32:34,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:32:34,738 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 05:32:34,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758451731] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:32:34,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:32:34,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-07-20 05:32:34,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350175612] [2022-07-20 05:32:34,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:32:34,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 05:32:34,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:34,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 05:32:34,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-20 05:32:34,740 INFO L87 Difference]: Start difference. First operand 129 states and 144 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 05:32:34,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:34,830 INFO L93 Difference]: Finished difference Result 216 states and 242 transitions. [2022-07-20 05:32:34,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 05:32:34,830 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2022-07-20 05:32:34,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:34,831 INFO L225 Difference]: With dead ends: 216 [2022-07-20 05:32:34,831 INFO L226 Difference]: Without dead ends: 216 [2022-07-20 05:32:34,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-07-20 05:32:34,832 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 221 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:34,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 551 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:32:34,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-07-20 05:32:34,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 129. [2022-07-20 05:32:34,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 99 states have (on average 1.202020202020202) internal successors, (119), 111 states have internal predecessors, (119), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-20 05:32:34,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 143 transitions. [2022-07-20 05:32:34,835 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 143 transitions. Word has length 51 [2022-07-20 05:32:34,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:34,835 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 143 transitions. [2022-07-20 05:32:34,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 05:32:34,835 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 143 transitions. [2022-07-20 05:32:34,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-20 05:32:34,836 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:34,836 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-07-20 05:32:34,852 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 05:32:35,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-20 05:32:35,036 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:35,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:35,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1565086581, now seen corresponding path program 1 times [2022-07-20 05:32:35,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:35,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321100096] [2022-07-20 05:32:35,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:35,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:35,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:35,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:35,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:35,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:35,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:35,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-20 05:32:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:35,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 05:32:35,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:35,066 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-20 05:32:35,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:35,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321100096] [2022-07-20 05:32:35,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321100096] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:35,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:32:35,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:32:35,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106936346] [2022-07-20 05:32:35,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:35,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:32:35,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:35,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:32:35,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:32:35,067 INFO L87 Difference]: Start difference. First operand 129 states and 143 transitions. Second operand has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:32:35,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:35,098 INFO L93 Difference]: Finished difference Result 125 states and 139 transitions. [2022-07-20 05:32:35,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:32:35,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 54 [2022-07-20 05:32:35,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:35,099 INFO L225 Difference]: With dead ends: 125 [2022-07-20 05:32:35,099 INFO L226 Difference]: Without dead ends: 125 [2022-07-20 05:32:35,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 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 05:32:35,100 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 75 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:35,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 108 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:32:35,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-20 05:32:35,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-07-20 05:32:35,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 107 states have internal predecessors, (115), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-20 05:32:35,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 139 transitions. [2022-07-20 05:32:35,103 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 139 transitions. Word has length 54 [2022-07-20 05:32:35,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:35,103 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 139 transitions. [2022-07-20 05:32:35,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:32:35,103 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 139 transitions. [2022-07-20 05:32:35,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-20 05:32:35,103 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:35,103 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-07-20 05:32:35,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-20 05:32:35,103 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:35,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:35,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1565086582, now seen corresponding path program 1 times [2022-07-20 05:32:35,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:35,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589195180] [2022-07-20 05:32:35,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:35,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:35,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:35,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:35,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:35,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:35,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:35,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:35,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-20 05:32:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:35,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 05:32:35,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:35,129 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-20 05:32:35,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:35,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589195180] [2022-07-20 05:32:35,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589195180] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:35,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:32:35,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:32:35,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525734258] [2022-07-20 05:32:35,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:35,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:32:35,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:35,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:32:35,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:32:35,130 INFO L87 Difference]: Start difference. First operand 125 states and 139 transitions. Second operand has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:32:35,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:35,150 INFO L93 Difference]: Finished difference Result 121 states and 135 transitions. [2022-07-20 05:32:35,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:32:35,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 54 [2022-07-20 05:32:35,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:35,151 INFO L225 Difference]: With dead ends: 121 [2022-07-20 05:32:35,151 INFO L226 Difference]: Without dead ends: 121 [2022-07-20 05:32:35,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 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 05:32:35,151 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 26 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:35,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 79 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:32:35,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-20 05:32:35,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-07-20 05:32:35,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 99 states have (on average 1.121212121212121) internal successors, (111), 103 states have internal predecessors, (111), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-20 05:32:35,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 135 transitions. [2022-07-20 05:32:35,154 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 135 transitions. Word has length 54 [2022-07-20 05:32:35,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:35,154 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 135 transitions. [2022-07-20 05:32:35,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:32:35,154 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 135 transitions. [2022-07-20 05:32:35,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 05:32:35,154 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:35,154 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2022-07-20 05:32:35,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-20 05:32:35,155 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:35,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:35,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1231729240, now seen corresponding path program 1 times [2022-07-20 05:32:35,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:35,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859068101] [2022-07-20 05:32:35,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:35,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:35,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:35,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:35,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:35,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:35,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:35,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:35,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-20 05:32:35,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:35,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 05:32:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:35,208 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-20 05:32:35,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:35,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859068101] [2022-07-20 05:32:35,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859068101] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:35,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:32:35,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-20 05:32:35,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120645147] [2022-07-20 05:32:35,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:35,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 05:32:35,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:35,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 05:32:35,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-20 05:32:35,215 INFO L87 Difference]: Start difference. First operand 121 states and 135 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:32:35,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:35,313 INFO L93 Difference]: Finished difference Result 149 states and 167 transitions. [2022-07-20 05:32:35,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 05:32:35,314 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 60 [2022-07-20 05:32:35,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:35,315 INFO L225 Difference]: With dead ends: 149 [2022-07-20 05:32:35,315 INFO L226 Difference]: Without dead ends: 149 [2022-07-20 05:32:35,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-07-20 05:32:35,315 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 64 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:35,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 412 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:32:35,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-20 05:32:35,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 128. [2022-07-20 05:32:35,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 105 states have (on average 1.1142857142857143) internal successors, (117), 109 states have internal predecessors, (117), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-20 05:32:35,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 143 transitions. [2022-07-20 05:32:35,318 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 143 transitions. Word has length 60 [2022-07-20 05:32:35,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:35,318 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 143 transitions. [2022-07-20 05:32:35,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:32:35,318 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 143 transitions. [2022-07-20 05:32:35,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-20 05:32:35,318 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:35,318 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:32:35,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-20 05:32:35,319 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:35,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:35,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1979191294, now seen corresponding path program 4 times [2022-07-20 05:32:35,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:35,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289513118] [2022-07-20 05:32:35,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:35,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:35,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:36,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:36,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:36,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:36,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:36,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:36,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:36,348 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-20 05:32:36,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:36,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289513118] [2022-07-20 05:32:36,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289513118] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:32:36,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726754717] [2022-07-20 05:32:36,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:32:36,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:32:36,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:32:36,349 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 05:32:36,350 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 05:32:36,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:32:36,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:32:36,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-20 05:32:36,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:32:36,434 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 7 treesize of output 6 [2022-07-20 05:32:36,437 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 05:32:38,495 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_19| Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| |v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_19|))) is different from true [2022-07-20 05:32:40,551 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_20| Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| |v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_20|))) is different from true [2022-07-20 05:32:42,610 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_21| Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| |v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_21|))) is different from true [2022-07-20 05:32:42,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-07-20 05:32:42,723 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 0 case distinctions, treesize of input 29 treesize of output 24 [2022-07-20 05:32:42,727 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 28 treesize of output 22 [2022-07-20 05:32:45,787 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 75 treesize of output 61 [2022-07-20 05:32:45,868 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 12 not checked. [2022-07-20 05:32:45,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:32:48,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726754717] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:32:48,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:32:48,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24] total 41 [2022-07-20 05:32:48,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162715715] [2022-07-20 05:32:48,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:32:48,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-20 05:32:48,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:48,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-20 05:32:48,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=2239, Unknown=6, NotChecked=300, Total=2862 [2022-07-20 05:32:48,741 INFO L87 Difference]: Start difference. First operand 128 states and 143 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 41 states have internal predecessors, (71), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-20 05:32:49,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:49,161 INFO L93 Difference]: Finished difference Result 143 states and 159 transitions. [2022-07-20 05:32:49,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-20 05:32:49,161 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 41 states have internal predecessors, (71), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 59 [2022-07-20 05:32:49,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:49,162 INFO L225 Difference]: With dead ends: 143 [2022-07-20 05:32:49,162 INFO L226 Difference]: Without dead ends: 143 [2022-07-20 05:32:49,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=350, Invalid=2518, Unknown=6, NotChecked=318, Total=3192 [2022-07-20 05:32:49,163 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 2 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 463 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:49,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1042 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 337 Invalid, 0 Unknown, 463 Unchecked, 0.2s Time] [2022-07-20 05:32:49,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-20 05:32:49,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-07-20 05:32:49,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 119 states have (on average 1.1176470588235294) internal successors, (133), 123 states have internal predecessors, (133), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-20 05:32:49,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 159 transitions. [2022-07-20 05:32:49,166 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 159 transitions. Word has length 59 [2022-07-20 05:32:49,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:49,166 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 159 transitions. [2022-07-20 05:32:49,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 41 states have internal predecessors, (71), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-20 05:32:49,166 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 159 transitions. [2022-07-20 05:32:49,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 05:32:49,167 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:49,167 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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 05:32:49,186 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 05:32:49,383 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,SelfDestructingSolverStorable27 [2022-07-20 05:32:49,383 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:49,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:49,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1385465723, now seen corresponding path program 1 times [2022-07-20 05:32:49,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:49,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278561493] [2022-07-20 05:32:49,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:49,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:49,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:49,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:49,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:49,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:49,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:49,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:49,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:49,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:49,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:49,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-20 05:32:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:49,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 05:32:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:49,463 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-20 05:32:49,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:49,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278561493] [2022-07-20 05:32:49,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278561493] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:49,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:32:49,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-20 05:32:49,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039455744] [2022-07-20 05:32:49,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:49,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 05:32:49,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:49,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 05:32:49,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:32:49,465 INFO L87 Difference]: Start difference. First operand 143 states and 159 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:32:49,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:49,670 INFO L93 Difference]: Finished difference Result 173 states and 194 transitions. [2022-07-20 05:32:49,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 05:32:49,685 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 62 [2022-07-20 05:32:49,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:49,686 INFO L225 Difference]: With dead ends: 173 [2022-07-20 05:32:49,686 INFO L226 Difference]: Without dead ends: 173 [2022-07-20 05:32:49,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-07-20 05:32:49,687 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 118 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:49,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 423 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:32:49,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-07-20 05:32:49,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 155. [2022-07-20 05:32:49,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 128 states have (on average 1.1171875) internal successors, (143), 133 states have internal predecessors, (143), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-20 05:32:49,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 173 transitions. [2022-07-20 05:32:49,690 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 173 transitions. Word has length 62 [2022-07-20 05:32:49,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:49,691 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 173 transitions. [2022-07-20 05:32:49,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:32:49,691 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 173 transitions. [2022-07-20 05:32:49,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 05:32:49,691 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:49,692 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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] [2022-07-20 05:32:49,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-20 05:32:49,692 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:49,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:49,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1711953782, now seen corresponding path program 1 times [2022-07-20 05:32:49,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:49,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947711993] [2022-07-20 05:32:49,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:49,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:49,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:49,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:49,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:49,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:49,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:49,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:49,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-20 05:32:49,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:49,793 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-20 05:32:49,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:49,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947711993] [2022-07-20 05:32:49,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947711993] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:32:49,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632074510] [2022-07-20 05:32:49,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:49,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:32:49,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:32:49,794 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 05:32:49,795 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 05:32:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:49,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-20 05:32:49,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:32:49,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:32:50,042 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 05:32:50,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-20 05:32:50,108 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 05:32:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-20 05:32:50,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:32:50,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632074510] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:50,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:32:50,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 17 [2022-07-20 05:32:50,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786641048] [2022-07-20 05:32:50,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:50,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 05:32:50,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:50,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 05:32:50,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-07-20 05:32:50,113 INFO L87 Difference]: Start difference. First operand 155 states and 173 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 05:32:50,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:50,300 INFO L93 Difference]: Finished difference Result 195 states and 216 transitions. [2022-07-20 05:32:50,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 05:32:50,300 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 62 [2022-07-20 05:32:50,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:50,301 INFO L225 Difference]: With dead ends: 195 [2022-07-20 05:32:50,301 INFO L226 Difference]: Without dead ends: 195 [2022-07-20 05:32:50,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-07-20 05:32:50,301 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 97 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:50,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 738 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 291 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-07-20 05:32:50,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-07-20 05:32:50,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 158. [2022-07-20 05:32:50,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 131 states have (on average 1.1068702290076335) internal successors, (145), 135 states have internal predecessors, (145), 14 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-20 05:32:50,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 173 transitions. [2022-07-20 05:32:50,304 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 173 transitions. Word has length 62 [2022-07-20 05:32:50,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:50,305 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 173 transitions. [2022-07-20 05:32:50,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 05:32:50,305 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 173 transitions. [2022-07-20 05:32:50,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-20 05:32:50,305 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:50,305 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:32:50,322 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 05:32:50,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:32:50,522 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:50,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:50,522 INFO L85 PathProgramCache]: Analyzing trace with hash -2066552335, now seen corresponding path program 5 times [2022-07-20 05:32:50,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:50,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851435589] [2022-07-20 05:32:50,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:50,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:50,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:50,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:50,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:50,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:50,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:50,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:50,568 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-20 05:32:50,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:50,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851435589] [2022-07-20 05:32:50,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851435589] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:32:50,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462705129] [2022-07-20 05:32:50,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:32:50,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:32:50,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:32:50,570 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 05:32:50,571 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 05:32:50,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-20 05:32:50,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:32:50,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-20 05:32:50,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:32:50,646 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:32:50,646 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 23 treesize of output 23 [2022-07-20 05:32:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-20 05:32:50,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:32:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 26 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-20 05:32:50,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462705129] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:32:50,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:32:50,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 25 [2022-07-20 05:32:50,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960564948] [2022-07-20 05:32:50,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:32:50,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-20 05:32:50,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:50,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-20 05:32:50,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-07-20 05:32:50,959 INFO L87 Difference]: Start difference. First operand 158 states and 173 transitions. Second operand has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 05:32:51,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:51,606 INFO L93 Difference]: Finished difference Result 331 states and 373 transitions. [2022-07-20 05:32:51,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-20 05:32:51,606 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 64 [2022-07-20 05:32:51,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:51,607 INFO L225 Difference]: With dead ends: 331 [2022-07-20 05:32:51,607 INFO L226 Difference]: Without dead ends: 331 [2022-07-20 05:32:51,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 121 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=481, Invalid=1681, Unknown=0, NotChecked=0, Total=2162 [2022-07-20 05:32:51,609 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 763 mSDsluCounter, 1217 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 1425 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:51,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [763 Valid, 1425 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 407 Invalid, 0 Unknown, 56 Unchecked, 0.3s Time] [2022-07-20 05:32:51,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-07-20 05:32:51,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 171. [2022-07-20 05:32:51,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 144 states have (on average 1.1180555555555556) internal successors, (161), 148 states have internal predecessors, (161), 14 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-20 05:32:51,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 189 transitions. [2022-07-20 05:32:51,619 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 189 transitions. Word has length 64 [2022-07-20 05:32:51,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:51,619 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 189 transitions. [2022-07-20 05:32:51,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 05:32:51,619 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 189 transitions. [2022-07-20 05:32:51,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-20 05:32:51,620 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:51,620 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:32:51,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-20 05:32:51,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:32:51,836 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:51,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:51,837 INFO L85 PathProgramCache]: Analyzing trace with hash -244535950, now seen corresponding path program 1 times [2022-07-20 05:32:51,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:51,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250899279] [2022-07-20 05:32:51,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:51,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:52,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:52,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:52,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:52,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:52,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:52,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:52,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:52,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-20 05:32:52,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:52,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 05:32:52,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:52,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-20 05:32:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-20 05:32:52,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:52,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250899279] [2022-07-20 05:32:52,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250899279] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:32:52,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785214382] [2022-07-20 05:32:52,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:52,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:32:52,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:32:52,034 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 05:32:52,035 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 05:32:52,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:52,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-20 05:32:52,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:32:52,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:32:52,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 05:32:52,278 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 05:32:52,619 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:32:52,620 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 29 treesize of output 17 [2022-07-20 05:32:52,663 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-20 05:32:52,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:32:52,847 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:32:52,847 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 706 treesize of output 654 [2022-07-20 05:32:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-20 05:32:53,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785214382] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:32:53,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:32:53,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 34 [2022-07-20 05:32:53,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068849935] [2022-07-20 05:32:53,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:32:53,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-20 05:32:53,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:53,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-20 05:32:53,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2022-07-20 05:32:53,377 INFO L87 Difference]: Start difference. First operand 171 states and 189 transitions. Second operand has 34 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 33 states have internal predecessors, (89), 8 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-07-20 05:32:54,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:54,751 INFO L93 Difference]: Finished difference Result 291 states and 324 transitions. [2022-07-20 05:32:54,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-20 05:32:54,752 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 33 states have internal predecessors, (89), 8 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) Word has length 70 [2022-07-20 05:32:54,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:54,753 INFO L225 Difference]: With dead ends: 291 [2022-07-20 05:32:54,753 INFO L226 Difference]: Without dead ends: 291 [2022-07-20 05:32:54,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=493, Invalid=2929, Unknown=0, NotChecked=0, Total=3422 [2022-07-20 05:32:54,754 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 470 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:54,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 1256 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1169 Invalid, 0 Unknown, 111 Unchecked, 0.5s Time] [2022-07-20 05:32:54,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-07-20 05:32:54,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 226. [2022-07-20 05:32:54,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 188 states have (on average 1.0957446808510638) internal successors, (206), 194 states have internal predecessors, (206), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (22), 18 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-20 05:32:54,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 250 transitions. [2022-07-20 05:32:54,759 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 250 transitions. Word has length 70 [2022-07-20 05:32:54,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:54,759 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 250 transitions. [2022-07-20 05:32:54,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 33 states have internal predecessors, (89), 8 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-07-20 05:32:54,759 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 250 transitions. [2022-07-20 05:32:54,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-20 05:32:54,760 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:54,760 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 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] [2022-07-20 05:32:54,779 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 05:32:54,979 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,SelfDestructingSolverStorable31 [2022-07-20 05:32:54,979 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:54,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:54,980 INFO L85 PathProgramCache]: Analyzing trace with hash 947110112, now seen corresponding path program 1 times [2022-07-20 05:32:54,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:54,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998688448] [2022-07-20 05:32:54,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:54,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:55,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:55,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:55,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:55,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:55,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:55,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:55,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-20 05:32:55,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:55,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-20 05:32:55,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:55,062 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-20 05:32:55,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:55,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998688448] [2022-07-20 05:32:55,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998688448] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:32:55,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202462279] [2022-07-20 05:32:55,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:55,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:32:55,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:32:55,064 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 05:32:55,066 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 05:32:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:55,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-20 05:32:55,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:32:55,268 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 05:32:55,351 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 05:32:55,354 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-20 05:32:55,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:32:55,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-07-20 05:32:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-20 05:32:55,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202462279] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:32:55,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:32:55,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 18 [2022-07-20 05:32:55,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240696057] [2022-07-20 05:32:55,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:32:55,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-20 05:32:55,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:55,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-20 05:32:55,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-07-20 05:32:55,513 INFO L87 Difference]: Start difference. First operand 226 states and 250 transitions. Second operand has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-20 05:32:55,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:55,875 INFO L93 Difference]: Finished difference Result 266 states and 291 transitions. [2022-07-20 05:32:55,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 05:32:55,875 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 73 [2022-07-20 05:32:55,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:55,876 INFO L225 Difference]: With dead ends: 266 [2022-07-20 05:32:55,876 INFO L226 Difference]: Without dead ends: 266 [2022-07-20 05:32:55,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 147 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2022-07-20 05:32:55,877 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 341 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:55,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 867 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 473 Invalid, 0 Unknown, 66 Unchecked, 0.2s Time] [2022-07-20 05:32:55,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-20 05:32:55,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 225. [2022-07-20 05:32:55,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 187 states have (on average 1.085561497326203) internal successors, (203), 193 states have internal predecessors, (203), 21 states have call successors, (21), 14 states have call predecessors, (21), 13 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-20 05:32:55,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 245 transitions. [2022-07-20 05:32:55,881 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 245 transitions. Word has length 73 [2022-07-20 05:32:55,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:55,881 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 245 transitions. [2022-07-20 05:32:55,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-20 05:32:55,881 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 245 transitions. [2022-07-20 05:32:55,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-20 05:32:55,882 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:55,882 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:32:55,901 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 05:32:56,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:32:56,099 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:56,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:56,099 INFO L85 PathProgramCache]: Analyzing trace with hash -285594530, now seen corresponding path program 1 times [2022-07-20 05:32:56,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:56,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132190366] [2022-07-20 05:32:56,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:56,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:56,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:56,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:56,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:56,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:56,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:56,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:56,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:56,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-20 05:32:56,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:56,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 05:32:56,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:56,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-20 05:32:56,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:56,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-20 05:32:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:56,351 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-20 05:32:56,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:56,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132190366] [2022-07-20 05:32:56,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132190366] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:32:56,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650029173] [2022-07-20 05:32:56,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:56,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:32:56,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:32:56,353 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 05:32:56,354 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 05:32:56,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:56,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-20 05:32:56,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:32:56,446 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 05:32:56,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:32:56,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:32:56,529 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:32:56,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 25 [2022-07-20 05:32:57,108 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 26 treesize of output 14 [2022-07-20 05:32:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-20 05:32:57,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:32:57,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2022-07-20 05:32:57,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650029173] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:32:57,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:32:57,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2022-07-20 05:32:57,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769232126] [2022-07-20 05:32:57,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:32:57,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-20 05:32:57,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:57,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-20 05:32:57,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1436, Unknown=0, NotChecked=0, Total=1640 [2022-07-20 05:32:57,841 INFO L87 Difference]: Start difference. First operand 225 states and 245 transitions. Second operand has 31 states, 28 states have (on average 2.892857142857143) internal successors, (81), 30 states have internal predecessors, (81), 8 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-20 05:32:58,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:58,740 INFO L93 Difference]: Finished difference Result 259 states and 280 transitions. [2022-07-20 05:32:58,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-20 05:32:58,741 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.892857142857143) internal successors, (81), 30 states have internal predecessors, (81), 8 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) Word has length 74 [2022-07-20 05:32:58,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:58,743 INFO L225 Difference]: With dead ends: 259 [2022-07-20 05:32:58,744 INFO L226 Difference]: Without dead ends: 259 [2022-07-20 05:32:58,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 115 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=550, Invalid=2872, Unknown=0, NotChecked=0, Total=3422 [2022-07-20 05:32:58,744 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 315 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:58,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 527 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 609 Invalid, 0 Unknown, 171 Unchecked, 0.3s Time] [2022-07-20 05:32:58,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-07-20 05:32:58,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 232. [2022-07-20 05:32:58,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 193 states have (on average 1.0880829015544042) internal successors, (210), 198 states have internal predecessors, (210), 21 states have call successors, (21), 16 states have call predecessors, (21), 15 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-20 05:32:58,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 252 transitions. [2022-07-20 05:32:58,748 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 252 transitions. Word has length 74 [2022-07-20 05:32:58,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:58,749 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 252 transitions. [2022-07-20 05:32:58,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.892857142857143) internal successors, (81), 30 states have internal predecessors, (81), 8 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-20 05:32:58,749 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 252 transitions. [2022-07-20 05:32:58,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-20 05:32:58,750 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:58,750 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:32:58,768 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 05:32:58,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:32:58,966 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:58,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:58,967 INFO L85 PathProgramCache]: Analyzing trace with hash 421565281, now seen corresponding path program 1 times [2022-07-20 05:32:58,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:58,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889214758] [2022-07-20 05:32:58,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:58,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:59,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:59,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:59,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:59,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:59,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:59,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:59,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:59,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:59,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-20 05:32:59,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:59,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 05:32:59,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:59,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-20 05:32:59,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:59,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-20 05:32:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:59,141 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-20 05:32:59,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:59,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889214758] [2022-07-20 05:32:59,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889214758] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:59,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:32:59,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-20 05:32:59,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279800157] [2022-07-20 05:32:59,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:59,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 05:32:59,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:59,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 05:32:59,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-07-20 05:32:59,142 INFO L87 Difference]: Start difference. First operand 232 states and 252 transitions. Second operand has 11 states, 10 states have (on average 4.2) internal successors, (42), 11 states have internal predecessors, (42), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-20 05:32:59,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:59,409 INFO L93 Difference]: Finished difference Result 254 states and 277 transitions. [2022-07-20 05:32:59,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:32:59,410 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 11 states have internal predecessors, (42), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 76 [2022-07-20 05:32:59,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:59,410 INFO L225 Difference]: With dead ends: 254 [2022-07-20 05:32:59,411 INFO L226 Difference]: Without dead ends: 254 [2022-07-20 05:32:59,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2022-07-20 05:32:59,411 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 252 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:59,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 217 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:32:59,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-07-20 05:32:59,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 248. [2022-07-20 05:32:59,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 207 states have (on average 1.0821256038647342) internal successors, (224), 211 states have internal predecessors, (224), 23 states have call successors, (23), 16 states have call predecessors, (23), 15 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-20 05:32:59,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 270 transitions. [2022-07-20 05:32:59,415 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 270 transitions. Word has length 76 [2022-07-20 05:32:59,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:59,415 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 270 transitions. [2022-07-20 05:32:59,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 11 states have internal predecessors, (42), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-20 05:32:59,415 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 270 transitions. [2022-07-20 05:32:59,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-20 05:32:59,415 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:59,416 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:32:59,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-20 05:32:59,416 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:32:59,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:59,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1507430298, now seen corresponding path program 1 times [2022-07-20 05:32:59,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:59,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489903672] [2022-07-20 05:32:59,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:59,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:59,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:59,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:32:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:59,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:32:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:59,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:32:59,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:59,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-20 05:32:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:59,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 05:32:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:59,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-20 05:32:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:59,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-20 05:32:59,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-20 05:32:59,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:59,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489903672] [2022-07-20 05:32:59,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489903672] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:32:59,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079577734] [2022-07-20 05:32:59,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:59,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:32:59,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:32:59,947 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 05:32:59,982 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 05:33:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:33:00,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-20 05:33:00,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:33:00,053 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 05:33:00,056 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 7 treesize of output 6 [2022-07-20 05:33:00,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-07-20 05:33:00,459 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 0 case distinctions, treesize of input 29 treesize of output 24 [2022-07-20 05:33:04,560 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-07-20 05:33:04,561 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 20 treesize of output 22 [2022-07-20 05:33:15,124 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 47 treesize of output 43 [2022-07-20 05:33:15,130 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 8 treesize of output 7 [2022-07-20 05:33:17,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 39 treesize of output 42 [2022-07-20 05:33:17,245 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 8 treesize of output 7 [2022-07-20 05:35:44,621 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:35:44,621 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 1 case distinctions, treesize of input 57 treesize of output 47 [2022-07-20 05:35:44,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-20 05:35:44,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-20 05:35:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-20 05:35:44,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:36:06,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079577734] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:36:06,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:36:06,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 46 [2022-07-20 05:36:06,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407890933] [2022-07-20 05:36:06,070 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:36:06,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-20 05:36:06,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:36:06,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-20 05:36:06,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=3267, Unknown=34, NotChecked=0, Total=3540 [2022-07-20 05:36:06,071 INFO L87 Difference]: Start difference. First operand 248 states and 270 transitions. Second operand has 46 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 45 states have internal predecessors, (93), 7 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-07-20 05:36:29,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:36:29,022 INFO L93 Difference]: Finished difference Result 264 states and 287 transitions. [2022-07-20 05:36:29,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-20 05:36:29,023 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 45 states have internal predecessors, (93), 7 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 80 [2022-07-20 05:36:29,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:36:29,024 INFO L225 Difference]: With dead ends: 264 [2022-07-20 05:36:29,024 INFO L226 Difference]: Without dead ends: 264 [2022-07-20 05:36:29,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 107 SyntacticMatches, 14 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 207.3s TimeCoverageRelationStatistics Valid=365, Invalid=4566, Unknown=39, NotChecked=0, Total=4970 [2022-07-20 05:36:29,025 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 30 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:36:29,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 992 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 418 Invalid, 0 Unknown, 268 Unchecked, 0.2s Time] [2022-07-20 05:36:29,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-07-20 05:36:29,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2022-07-20 05:36:29,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 220 states have (on average 1.0772727272727274) internal successors, (237), 223 states have internal predecessors, (237), 25 states have call successors, (25), 18 states have call predecessors, (25), 16 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-20 05:36:29,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 287 transitions. [2022-07-20 05:36:29,029 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 287 transitions. Word has length 80 [2022-07-20 05:36:29,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:36:29,030 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 287 transitions. [2022-07-20 05:36:29,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 45 states have internal predecessors, (93), 7 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-07-20 05:36:29,030 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 287 transitions. [2022-07-20 05:36:29,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-20 05:36:29,030 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:36:29,031 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 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 05:36:29,059 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 05:36:29,243 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,SelfDestructingSolverStorable35 [2022-07-20 05:36:29,244 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-07-20 05:36:29,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:36:29,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1779636283, now seen corresponding path program 6 times [2022-07-20 05:36:29,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:36:29,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899296926] [2022-07-20 05:36:29,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:36:29,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:36:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:36:32,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:36:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:36:32,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-20 05:36:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:36:32,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-20 05:36:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:36:32,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 05:36:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:36:32,661 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 31 proven. 87 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-20 05:36:32,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:36:32,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899296926] [2022-07-20 05:36:32,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899296926] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:36:32,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964837558] [2022-07-20 05:36:32,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:36:32,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:36:32,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:36:32,663 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 05:36:32,664 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 05:36:32,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-20 05:36:32,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:36:32,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-20 05:36:32,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:36:32,813 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 7 treesize of output 6 [2022-07-20 05:36:32,817 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 05:36:34,954 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_25| Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| |v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_25|))) is different from true [2022-07-20 05:36:37,026 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_26| Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| |v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_26|))) is different from true [2022-07-20 05:36:43,228 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_27| Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| |v_ULTIMATE.start_mkdup_~a#1.base_BEFORE_CALL_27|))) is different from true [2022-07-20 05:36:43,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-07-20 05:36:43,377 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-07-20 05:36:43,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24