./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 35987657 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/termination-crafted/LexIndexValue-Pointer-3.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-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 64bit --witnessprinter.graph.data.programhash 29e5ebbacca85d2fb1b0bd6d164adabb3234eca085536ff1d3458c8110967632 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:03:07,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:03:07,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:03:07,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:03:07,825 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:03:07,826 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:03:07,829 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:03:07,832 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:03:07,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:03:07,838 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:03:07,839 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:03:07,841 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:03:07,842 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:03:07,843 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:03:07,844 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:03:07,849 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:03:07,850 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:03:07,851 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:03:07,852 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:03:07,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:03:07,858 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:03:07,860 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:03:07,860 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:03:07,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:03:07,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:03:07,870 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:03:07,870 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:03:07,870 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:03:07,871 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:03:07,872 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:03:07,872 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:03:07,873 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:03:07,874 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:03:07,875 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:03:07,876 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:03:07,877 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:03:07,877 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:03:07,878 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:03:07,878 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:03:07,878 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:03:07,879 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:03:07,880 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:03:07,888 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2022-07-21 17:03:07,925 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:03:07,925 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:03:07,926 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:03:07,926 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:03:07,927 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:03:07,927 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:03:07,927 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:03:07,928 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:03:07,928 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:03:07,929 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:03:07,929 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:03:07,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:03:07,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:03:07,929 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:03:07,930 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:03:07,930 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:03:07,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:03:07,930 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:03:07,931 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:03:07,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:03:07,931 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:03:07,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:03:07,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:03:07,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:03:07,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:03:07,932 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 17:03:07,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 17:03:07,932 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 29e5ebbacca85d2fb1b0bd6d164adabb3234eca085536ff1d3458c8110967632 [2022-07-21 17:03:08,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:03:08,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:03:08,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:03:08,245 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:03:08,246 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:03:08,247 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c [2022-07-21 17:03:08,305 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fb35658d/25207ff1abe74519a049a0945fb96dda/FLAG2e8843e4a [2022-07-21 17:03:08,643 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:03:08,644 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c [2022-07-21 17:03:08,648 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fb35658d/25207ff1abe74519a049a0945fb96dda/FLAG2e8843e4a [2022-07-21 17:03:09,058 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fb35658d/25207ff1abe74519a049a0945fb96dda [2022-07-21 17:03:09,060 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:03:09,061 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:03:09,064 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:03:09,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:03:09,067 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:03:09,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:03:09" (1/1) ... [2022-07-21 17:03:09,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@178fc96a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:09, skipping insertion in model container [2022-07-21 17:03:09,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:03:09" (1/1) ... [2022-07-21 17:03:09,074 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:03:09,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:03:09,197 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:03:09,202 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 17:03:09,214 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:03:09,224 INFO L208 MainTranslator]: Completed translation [2022-07-21 17:03:09,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:09 WrapperNode [2022-07-21 17:03:09,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:03:09,226 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 17:03:09,226 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 17:03:09,226 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 17:03:09,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:09" (1/1) ... [2022-07-21 17:03:09,250 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:09" (1/1) ... [2022-07-21 17:03:09,272 INFO L137 Inliner]: procedures = 10, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 45 [2022-07-21 17:03:09,274 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 17:03:09,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 17:03:09,276 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 17:03:09,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 17:03:09,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:09" (1/1) ... [2022-07-21 17:03:09,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:09" (1/1) ... [2022-07-21 17:03:09,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:09" (1/1) ... [2022-07-21 17:03:09,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:09" (1/1) ... [2022-07-21 17:03:09,300 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:09" (1/1) ... [2022-07-21 17:03:09,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:09" (1/1) ... [2022-07-21 17:03:09,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:09" (1/1) ... [2022-07-21 17:03:09,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 17:03:09,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 17:03:09,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 17:03:09,318 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 17:03:09,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:09" (1/1) ... [2022-07-21 17:03:09,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:03:09,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:09,344 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) [2022-07-21 17:03:09,371 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 [2022-07-21 17:03:09,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 17:03:09,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 17:03:09,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 17:03:09,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 17:03:09,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 17:03:09,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 17:03:09,455 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 17:03:09,456 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 17:03:09,622 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 17:03:09,627 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 17:03:09,627 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 17:03:09,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:03:09 BoogieIcfgContainer [2022-07-21 17:03:09,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 17:03:09,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 17:03:09,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 17:03:09,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 17:03:09,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:03:09" (1/3) ... [2022-07-21 17:03:09,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d53632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:03:09, skipping insertion in model container [2022-07-21 17:03:09,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:09" (2/3) ... [2022-07-21 17:03:09,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d53632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:03:09, skipping insertion in model container [2022-07-21 17:03:09,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:03:09" (3/3) ... [2022-07-21 17:03:09,636 INFO L111 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-3.c [2022-07-21 17:03:09,659 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 17:03:09,660 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-07-21 17:03:09,703 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 17:03:09,728 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@2047e4d8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@79d49a02 [2022-07-21 17:03:09,728 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-07-21 17:03:09,733 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.894736842105263) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:09,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-21 17:03:09,745 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:09,746 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-21 17:03:09,746 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:03:09,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:09,750 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-07-21 17:03:09,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:09,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578995684] [2022-07-21 17:03:09,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:09,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:09,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:09,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578995684] [2022-07-21 17:03:09,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578995684] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:03:09,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:03:09,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:03:09,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421420541] [2022-07-21 17:03:09,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:03:09,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:03:09,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:09,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:03:09,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:03:09,937 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.894736842105263) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:09,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:09,992 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-07-21 17:03:09,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:03:09,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-07-21 17:03:09,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:10,000 INFO L225 Difference]: With dead ends: 30 [2022-07-21 17:03:10,001 INFO L226 Difference]: Without dead ends: 28 [2022-07-21 17:03:10,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:03:10,007 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:10,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 19 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:03:10,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-21 17:03:10,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-07-21 17:03:10,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:10,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-07-21 17:03:10,038 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 4 [2022-07-21 17:03:10,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:10,038 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-07-21 17:03:10,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:10,039 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-07-21 17:03:10,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-21 17:03:10,039 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:10,039 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-21 17:03:10,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 17:03:10,041 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:03:10,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:10,043 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-07-21 17:03:10,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:10,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624869699] [2022-07-21 17:03:10,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:10,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:10,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:10,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:10,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624869699] [2022-07-21 17:03:10,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624869699] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:03:10,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:03:10,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:03:10,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129048172] [2022-07-21 17:03:10,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:03:10,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:03:10,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:10,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:03:10,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:03:10,118 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:10,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:10,158 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2022-07-21 17:03:10,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:03:10,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-07-21 17:03:10,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:10,161 INFO L225 Difference]: With dead ends: 32 [2022-07-21 17:03:10,162 INFO L226 Difference]: Without dead ends: 32 [2022-07-21 17:03:10,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:03:10,167 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:10,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 37 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:03:10,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-21 17:03:10,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-07-21 17:03:10,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.6) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:10,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-07-21 17:03:10,179 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 4 [2022-07-21 17:03:10,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:10,180 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-07-21 17:03:10,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:10,180 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-07-21 17:03:10,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 17:03:10,181 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:10,181 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:10,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 17:03:10,182 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:03:10,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:10,184 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2022-07-21 17:03:10,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:10,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993923768] [2022-07-21 17:03:10,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:10,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:10,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:10,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:10,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993923768] [2022-07-21 17:03:10,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993923768] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:10,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765784030] [2022-07-21 17:03:10,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:10,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:10,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:10,304 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) [2022-07-21 17:03:10,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 17:03:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:10,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 17:03:10,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:10,423 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 [2022-07-21 17:03:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:10,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:03:10,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:10,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765784030] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:03:10,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:03:10,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-07-21 17:03:10,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691237648] [2022-07-21 17:03:10,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:03:10,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 17:03:10,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:10,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 17:03:10,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:03:10,541 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:10,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:10,662 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2022-07-21 17:03:10,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:03:10,663 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-21 17:03:10,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:10,663 INFO L225 Difference]: With dead ends: 39 [2022-07-21 17:03:10,664 INFO L226 Difference]: Without dead ends: 39 [2022-07-21 17:03:10,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:03:10,665 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:10,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 62 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:03:10,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-21 17:03:10,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-07-21 17:03:10,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:10,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2022-07-21 17:03:10,670 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 8 [2022-07-21 17:03:10,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:10,670 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2022-07-21 17:03:10,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:10,671 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2022-07-21 17:03:10,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 17:03:10,671 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:10,672 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-07-21 17:03:10,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 17:03:10,895 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 [2022-07-21 17:03:10,896 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:03:10,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:10,896 INFO L85 PathProgramCache]: Analyzing trace with hash 519338591, now seen corresponding path program 1 times [2022-07-21 17:03:10,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:10,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355799327] [2022-07-21 17:03:10,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:10,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:10,959 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-21 17:03:10,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:10,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355799327] [2022-07-21 17:03:10,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355799327] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:03:10,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:03:10,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:03:10,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754147153] [2022-07-21 17:03:10,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:03:10,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:03:10,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:10,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:03:10,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:03:10,964 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:10,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:10,994 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2022-07-21 17:03:10,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:03:10,995 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-21 17:03:10,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:10,996 INFO L225 Difference]: With dead ends: 36 [2022-07-21 17:03:10,997 INFO L226 Difference]: Without dead ends: 36 [2022-07-21 17:03:10,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:03:11,001 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:11,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 15 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:03:11,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-21 17:03:11,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-07-21 17:03:11,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:11,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-07-21 17:03:11,009 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 21 [2022-07-21 17:03:11,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:11,010 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-07-21 17:03:11,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:11,011 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-07-21 17:03:11,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 17:03:11,011 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:11,012 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-07-21 17:03:11,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 17:03:11,012 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:03:11,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:11,013 INFO L85 PathProgramCache]: Analyzing trace with hash 519338592, now seen corresponding path program 1 times [2022-07-21 17:03:11,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:11,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953654548] [2022-07-21 17:03:11,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:11,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:11,080 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:11,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:11,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953654548] [2022-07-21 17:03:11,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953654548] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:11,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744698158] [2022-07-21 17:03:11,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:11,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:11,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:11,083 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) [2022-07-21 17:03:11,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 17:03:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:11,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 17:03:11,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:11,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:03:11,289 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:11,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744698158] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:03:11,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:03:11,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-21 17:03:11,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747581010] [2022-07-21 17:03:11,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:03:11,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 17:03:11,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:11,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 17:03:11,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-21 17:03:11,298 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:11,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:11,349 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2022-07-21 17:03:11,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 17:03:11,349 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-21 17:03:11,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:11,350 INFO L225 Difference]: With dead ends: 60 [2022-07-21 17:03:11,350 INFO L226 Difference]: Without dead ends: 60 [2022-07-21 17:03:11,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-21 17:03:11,351 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:11,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 88 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:03:11,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-21 17:03:11,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-21 17:03:11,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:11,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-07-21 17:03:11,356 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 21 [2022-07-21 17:03:11,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:11,357 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-07-21 17:03:11,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:11,357 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-07-21 17:03:11,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-21 17:03:11,363 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:11,363 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1] [2022-07-21 17:03:11,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 17:03:11,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:11,586 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:03:11,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:11,587 INFO L85 PathProgramCache]: Analyzing trace with hash 649821198, now seen corresponding path program 2 times [2022-07-21 17:03:11,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:11,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986787354] [2022-07-21 17:03:11,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:11,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:11,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:11,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986787354] [2022-07-21 17:03:11,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986787354] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:11,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423418914] [2022-07-21 17:03:11,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:03:11,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:11,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:11,804 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) [2022-07-21 17:03:11,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 17:03:11,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 17:03:11,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:03:11,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 17:03:11,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:11,912 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 [2022-07-21 17:03:12,064 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-07-21 17:03:12,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:03:12,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423418914] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:03:12,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:03:12,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2022-07-21 17:03:12,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969127350] [2022-07-21 17:03:12,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:03:12,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:03:12,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:12,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:03:12,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:03:12,067 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:12,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:12,111 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2022-07-21 17:03:12,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:03:12,111 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-21 17:03:12,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:12,112 INFO L225 Difference]: With dead ends: 73 [2022-07-21 17:03:12,112 INFO L226 Difference]: Without dead ends: 73 [2022-07-21 17:03:12,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-07-21 17:03:12,113 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 44 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:12,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 20 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:03:12,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-21 17:03:12,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2022-07-21 17:03:12,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 66 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:12,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2022-07-21 17:03:12,128 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 45 [2022-07-21 17:03:12,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:12,128 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2022-07-21 17:03:12,128 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:12,129 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2022-07-21 17:03:12,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 17:03:12,129 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:12,130 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:12,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 17:03:12,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:12,340 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:03:12,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:12,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1405678828, now seen corresponding path program 1 times [2022-07-21 17:03:12,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:12,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424523866] [2022-07-21 17:03:12,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:12,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:12,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:03:12,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:12,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424523866] [2022-07-21 17:03:12,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424523866] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:12,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263408198] [2022-07-21 17:03:12,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:12,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:12,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:12,539 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) [2022-07-21 17:03:12,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 17:03:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:12,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 17:03:12,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:12,682 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:03:12,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:03:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:03:12,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263408198] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:03:12,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:03:12,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-21 17:03:12,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122106681] [2022-07-21 17:03:12,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:03:12,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 17:03:12,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:12,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 17:03:12,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-21 17:03:12,908 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 25 states, 25 states have (on average 3.8) internal successors, (95), 25 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:13,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:13,006 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2022-07-21 17:03:13,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 17:03:13,008 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.8) internal successors, (95), 25 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-21 17:03:13,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:13,010 INFO L225 Difference]: With dead ends: 115 [2022-07-21 17:03:13,011 INFO L226 Difference]: Without dead ends: 115 [2022-07-21 17:03:13,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-21 17:03:13,012 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 66 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:13,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 82 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:03:13,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-21 17:03:13,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-07-21 17:03:13,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.0818181818181818) internal successors, (119), 114 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:13,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2022-07-21 17:03:13,025 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 48 [2022-07-21 17:03:13,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:13,028 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2022-07-21 17:03:13,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.8) internal successors, (95), 25 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:13,029 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2022-07-21 17:03:13,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-21 17:03:13,035 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:13,035 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:13,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 17:03:13,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:13,253 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:03:13,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:13,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1050107376, now seen corresponding path program 2 times [2022-07-21 17:03:13,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:13,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783743438] [2022-07-21 17:03:13,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:13,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:13,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:13,573 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:03:13,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:13,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783743438] [2022-07-21 17:03:13,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783743438] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:13,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000356370] [2022-07-21 17:03:13,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:03:13,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:13,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:13,575 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) [2022-07-21 17:03:13,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 17:03:13,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:03:13,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:03:13,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 17:03:13,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:03:13,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:03:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:03:14,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000356370] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:03:14,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:03:14,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-07-21 17:03:14,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32314747] [2022-07-21 17:03:14,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:03:14,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-21 17:03:14,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:14,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-21 17:03:14,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-21 17:03:14,581 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand has 49 states, 49 states have (on average 3.8979591836734695) internal successors, (191), 49 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:14,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:14,749 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2022-07-21 17:03:14,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-21 17:03:14,750 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.8979591836734695) internal successors, (191), 49 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2022-07-21 17:03:14,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:14,751 INFO L225 Difference]: With dead ends: 211 [2022-07-21 17:03:14,751 INFO L226 Difference]: Without dead ends: 211 [2022-07-21 17:03:14,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-21 17:03:14,753 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 207 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:14,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 124 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:03:14,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-07-21 17:03:14,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2022-07-21 17:03:14,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0436893203883495) internal successors, (215), 210 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:14,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 215 transitions. [2022-07-21 17:03:14,765 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 215 transitions. Word has length 96 [2022-07-21 17:03:14,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:14,766 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 215 transitions. [2022-07-21 17:03:14,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.8979591836734695) internal successors, (191), 49 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:14,766 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 215 transitions. [2022-07-21 17:03:14,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-07-21 17:03:14,768 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:14,768 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:14,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 17:03:14,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:14,992 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:03:14,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:14,993 INFO L85 PathProgramCache]: Analyzing trace with hash -17107880, now seen corresponding path program 3 times [2022-07-21 17:03:14,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:14,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676264285] [2022-07-21 17:03:14,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:14,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:03:16,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:16,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676264285] [2022-07-21 17:03:16,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676264285] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:16,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581832778] [2022-07-21 17:03:16,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:03:16,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:16,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:16,101 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) [2022-07-21 17:03:16,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 17:03:16,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 17:03:16,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:03:16,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 17:03:16,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:16,206 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 [2022-07-21 17:03:16,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2022-07-21 17:03:16,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:03:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2022-07-21 17:03:17,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581832778] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:03:17,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:03:17,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 5, 5] total 57 [2022-07-21 17:03:17,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158335457] [2022-07-21 17:03:17,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:03:17,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-21 17:03:17,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:17,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-21 17:03:17,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1202, Invalid=1990, Unknown=0, NotChecked=0, Total=3192 [2022-07-21 17:03:17,481 INFO L87 Difference]: Start difference. First operand 211 states and 215 transitions. Second operand has 57 states, 57 states have (on average 3.754385964912281) internal successors, (214), 57 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:19,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:19,185 INFO L93 Difference]: Finished difference Result 250 states and 255 transitions. [2022-07-21 17:03:19,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-21 17:03:19,186 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.754385964912281) internal successors, (214), 57 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2022-07-21 17:03:19,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:19,187 INFO L225 Difference]: With dead ends: 250 [2022-07-21 17:03:19,187 INFO L226 Difference]: Without dead ends: 250 [2022-07-21 17:03:19,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1752 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3640, Invalid=8132, Unknown=0, NotChecked=0, Total=11772 [2022-07-21 17:03:19,195 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 341 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:19,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 119 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:03:19,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-07-21 17:03:19,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 228. [2022-07-21 17:03:19,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 225 states have (on average 1.048888888888889) internal successors, (236), 227 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:19,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 236 transitions. [2022-07-21 17:03:19,211 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 236 transitions. Word has length 192 [2022-07-21 17:03:19,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:19,212 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 236 transitions. [2022-07-21 17:03:19,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.754385964912281) internal successors, (214), 57 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:19,213 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 236 transitions. [2022-07-21 17:03:19,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-07-21 17:03:19,217 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:19,217 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:19,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 17:03:19,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:19,420 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:03:19,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:19,420 INFO L85 PathProgramCache]: Analyzing trace with hash 602519778, now seen corresponding path program 1 times [2022-07-21 17:03:19,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:19,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175145479] [2022-07-21 17:03:19,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:19,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:19,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4371 trivial. 0 not checked. [2022-07-21 17:03:19,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:19,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175145479] [2022-07-21 17:03:19,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175145479] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:03:19,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:03:19,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:03:19,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205126120] [2022-07-21 17:03:19,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:03:19,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:03:19,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:19,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:03:19,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:03:19,560 INFO L87 Difference]: Start difference. First operand 228 states and 236 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:19,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:19,567 INFO L93 Difference]: Finished difference Result 227 states and 235 transitions. [2022-07-21 17:03:19,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:03:19,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2022-07-21 17:03:19,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:19,570 INFO L225 Difference]: With dead ends: 227 [2022-07-21 17:03:19,570 INFO L226 Difference]: Without dead ends: 227 [2022-07-21 17:03:19,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:03:19,571 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:19,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 16 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:03:19,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-07-21 17:03:19,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-07-21 17:03:19,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 225 states have (on average 1.0444444444444445) internal successors, (235), 226 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:19,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 235 transitions. [2022-07-21 17:03:19,579 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 235 transitions. Word has length 196 [2022-07-21 17:03:19,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:19,580 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 235 transitions. [2022-07-21 17:03:19,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:19,580 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 235 transitions. [2022-07-21 17:03:19,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-07-21 17:03:19,581 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:19,582 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:19,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 17:03:19,582 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:03:19,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:19,583 INFO L85 PathProgramCache]: Analyzing trace with hash -799075579, now seen corresponding path program 1 times [2022-07-21 17:03:19,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:19,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520374600] [2022-07-21 17:03:19,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:19,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:20,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:20,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:20,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520374600] [2022-07-21 17:03:20,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520374600] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:20,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577074423] [2022-07-21 17:03:20,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:20,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:20,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:20,536 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) [2022-07-21 17:03:20,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 17:03:20,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:20,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-21 17:03:20,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:20,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:20,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:03:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:23,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577074423] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:03:23,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:03:23,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2022-07-21 17:03:23,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255583505] [2022-07-21 17:03:23,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:03:23,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-07-21 17:03:23,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:23,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-07-21 17:03:23,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2022-07-21 17:03:23,506 INFO L87 Difference]: Start difference. First operand 227 states and 235 transitions. Second operand has 99 states, 99 states have (on average 3.9696969696969697) internal successors, (393), 99 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:23,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:23,893 INFO L93 Difference]: Finished difference Result 423 states and 431 transitions. [2022-07-21 17:03:23,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-07-21 17:03:23,894 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 3.9696969696969697) internal successors, (393), 99 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 198 [2022-07-21 17:03:23,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:23,895 INFO L225 Difference]: With dead ends: 423 [2022-07-21 17:03:23,896 INFO L226 Difference]: Without dead ends: 423 [2022-07-21 17:03:23,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2022-07-21 17:03:23,898 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 288 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:23,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 211 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:03:23,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-07-21 17:03:23,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 423. [2022-07-21 17:03:23,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 421 states have (on average 1.0237529691211402) internal successors, (431), 422 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:23,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 431 transitions. [2022-07-21 17:03:23,905 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 431 transitions. Word has length 198 [2022-07-21 17:03:23,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:23,905 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 431 transitions. [2022-07-21 17:03:23,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 3.9696969696969697) internal successors, (393), 99 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:23,906 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 431 transitions. [2022-07-21 17:03:23,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2022-07-21 17:03:23,910 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:23,910 INFO L195 NwaCegarLoop]: trace histogram [96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:23,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-21 17:03:24,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:24,124 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:03:24,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:24,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1623122088, now seen corresponding path program 2 times [2022-07-21 17:03:24,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:24,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409448941] [2022-07-21 17:03:24,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:24,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:27,600 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:27,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:27,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409448941] [2022-07-21 17:03:27,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409448941] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:27,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959105473] [2022-07-21 17:03:27,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:03:27,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:27,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:27,606 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) [2022-07-21 17:03:27,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 17:03:27,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 17:03:27,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:03:27,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 17:03:27,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:28,892 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18336 trivial. 0 not checked. [2022-07-21 17:03:28,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:03:28,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959105473] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:03:28,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:03:28,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [99] total 101 [2022-07-21 17:03:28,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113326651] [2022-07-21 17:03:28,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:03:28,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:03:28,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:28,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:03:28,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4855, Invalid=5245, Unknown=0, NotChecked=0, Total=10100 [2022-07-21 17:03:28,895 INFO L87 Difference]: Start difference. First operand 423 states and 431 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:28,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:28,901 INFO L93 Difference]: Finished difference Result 429 states and 437 transitions. [2022-07-21 17:03:28,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:03:28,901 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 394 [2022-07-21 17:03:28,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:28,903 INFO L225 Difference]: With dead ends: 429 [2022-07-21 17:03:28,904 INFO L226 Difference]: Without dead ends: 425 [2022-07-21 17:03:28,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4855, Invalid=5245, Unknown=0, NotChecked=0, Total=10100 [2022-07-21 17:03:28,906 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:28,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 16 Unchecked, 0.0s Time] [2022-07-21 17:03:28,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-07-21 17:03:28,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 425. [2022-07-21 17:03:28,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 423 states have (on average 1.0236406619385343) internal successors, (433), 424 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:28,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 433 transitions. [2022-07-21 17:03:28,913 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 433 transitions. Word has length 394 [2022-07-21 17:03:28,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:28,914 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 433 transitions. [2022-07-21 17:03:28,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:28,914 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 433 transitions. [2022-07-21 17:03:28,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2022-07-21 17:03:28,919 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:28,919 INFO L195 NwaCegarLoop]: trace histogram [96, 96, 96, 96, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:28,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 17:03:29,143 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,SelfDestructingSolverStorable11 [2022-07-21 17:03:29,144 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:03:29,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:29,144 INFO L85 PathProgramCache]: Analyzing trace with hash -342671882, now seen corresponding path program 1 times [2022-07-21 17:03:29,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:29,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292879827] [2022-07-21 17:03:29,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:29,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:29,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 18338 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:03:32,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:32,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292879827] [2022-07-21 17:03:32,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292879827] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:32,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023671322] [2022-07-21 17:03:32,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:32,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:32,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:32,448 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) [2022-07-21 17:03:32,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 17:03:32,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:32,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 1407 conjuncts, 98 conjunts are in the unsatisfiable core [2022-07-21 17:03:32,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 18338 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:03:33,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:03:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18338 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:03:42,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023671322] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:03:42,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:03:42,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 197 [2022-07-21 17:03:42,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096445588] [2022-07-21 17:03:42,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:03:42,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2022-07-21 17:03:42,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:42,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2022-07-21 17:03:42,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2022-07-21 17:03:42,034 INFO L87 Difference]: Start difference. First operand 425 states and 433 transitions. Second operand has 197 states, 197 states have (on average 3.99492385786802) internal successors, (787), 197 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:43,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:43,651 INFO L93 Difference]: Finished difference Result 817 states and 825 transitions. [2022-07-21 17:03:43,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2022-07-21 17:03:43,651 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 197 states have (on average 3.99492385786802) internal successors, (787), 197 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 397 [2022-07-21 17:03:43,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:43,654 INFO L225 Difference]: With dead ends: 817 [2022-07-21 17:03:43,654 INFO L226 Difference]: Without dead ends: 817 [2022-07-21 17:03:43,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 891 GetRequests, 696 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2022-07-21 17:03:43,657 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 873 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:43,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 324 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 17:03:43,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-07-21 17:03:43,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 817. [2022-07-21 17:03:43,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 815 states have (on average 1.0122699386503067) internal successors, (825), 816 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:43,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 825 transitions. [2022-07-21 17:03:43,669 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 825 transitions. Word has length 397 [2022-07-21 17:03:43,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:43,669 INFO L495 AbstractCegarLoop]: Abstraction has 817 states and 825 transitions. [2022-07-21 17:03:43,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 197 states have (on average 3.99492385786802) internal successors, (787), 197 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:43,670 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 825 transitions. [2022-07-21 17:03:43,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 790 [2022-07-21 17:03:43,675 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:43,675 INFO L195 NwaCegarLoop]: trace histogram [194, 194, 194, 194, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:43,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 17:03:43,883 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,SelfDestructingSolverStorable12 [2022-07-21 17:03:43,884 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:03:43,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:43,884 INFO L85 PathProgramCache]: Analyzing trace with hash -2100549616, now seen corresponding path program 2 times [2022-07-21 17:03:43,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:43,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278911530] [2022-07-21 17:03:43,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:43,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:44,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:55,994 INFO L134 CoverageAnalysis]: Checked inductivity of 75080 backedges. 0 proven. 75078 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:03:55,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:55,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278911530] [2022-07-21 17:03:55,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278911530] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:55,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087061641] [2022-07-21 17:03:55,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:03:55,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:55,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:56,000 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) [2022-07-21 17:03:56,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 17:03:56,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 17:03:56,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:03:56,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 17:03:56,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 75080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75080 trivial. 0 not checked. [2022-07-21 17:03:58,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:03:58,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087061641] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:03:58,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:03:58,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [197] total 199 [2022-07-21 17:03:58,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506109739] [2022-07-21 17:03:58,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:03:58,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:03:58,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:58,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:03:58,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19310, Invalid=20092, Unknown=0, NotChecked=0, Total=39402 [2022-07-21 17:03:58,421 INFO L87 Difference]: Start difference. First operand 817 states and 825 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:58,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:58,424 INFO L93 Difference]: Finished difference Result 837 states and 851 transitions. [2022-07-21 17:03:58,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:03:58,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 789 [2022-07-21 17:03:58,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:58,427 INFO L225 Difference]: With dead ends: 837 [2022-07-21 17:03:58,427 INFO L226 Difference]: Without dead ends: 833 [2022-07-21 17:03:58,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 985 GetRequests, 788 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=19310, Invalid=20092, Unknown=0, NotChecked=0, Total=39402 [2022-07-21 17:03:58,430 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:58,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 30 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 15 Unchecked, 0.0s Time] [2022-07-21 17:03:58,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-07-21 17:03:58,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 828. [2022-07-21 17:03:58,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 826 states have (on average 1.0181598062953996) internal successors, (841), 827 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:58,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 841 transitions. [2022-07-21 17:03:58,442 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 841 transitions. Word has length 789 [2022-07-21 17:03:58,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:58,443 INFO L495 AbstractCegarLoop]: Abstraction has 828 states and 841 transitions. [2022-07-21 17:03:58,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:58,444 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 841 transitions. [2022-07-21 17:03:58,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 794 [2022-07-21 17:03:58,449 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:58,449 INFO L195 NwaCegarLoop]: trace histogram [194, 194, 194, 194, 4, 4, 4, 1, 1, 1, 1, 1] [2022-07-21 17:03:58,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 17:03:58,663 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,SelfDestructingSolverStorable13 [2022-07-21 17:03:58,663 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-21 17:03:58,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:58,664 INFO L85 PathProgramCache]: Analyzing trace with hash 708285286, now seen corresponding path program 4 times [2022-07-21 17:03:58,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:58,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543361184] [2022-07-21 17:03:58,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:58,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:10,873 INFO L134 CoverageAnalysis]: Checked inductivity of 75100 backedges. 0 proven. 75078 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 17:04:10,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:04:10,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543361184] [2022-07-21 17:04:10,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543361184] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:04:10,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936614492] [2022-07-21 17:04:10,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 17:04:10,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:04:10,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:04:10,875 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) [2022-07-21 17:04:10,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process