./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 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/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-?-6c24879 [2022-07-12 18:30:29,752 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:30:29,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:30:29,795 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:30:29,796 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:30:29,797 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:30:29,801 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:30:29,803 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:30:29,804 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:30:29,807 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:30:29,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:30:29,809 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:30:29,809 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:30:29,811 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:30:29,813 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:30:29,814 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:30:29,815 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:30:29,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:30:29,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:30:29,820 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:30:29,823 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:30:29,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:30:29,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:30:29,825 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:30:29,826 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:30:29,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:30:29,832 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:30:29,832 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:30:29,833 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:30:29,833 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:30:29,834 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:30:29,834 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:30:29,835 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:30:29,836 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:30:29,837 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:30:29,837 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:30:29,837 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:30:29,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:30:29,838 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:30:29,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:30:29,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:30:29,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:30:29,841 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2022-07-12 18:30:29,862 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:30:29,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:30:29,865 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:30:29,865 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:30:29,866 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:30:29,866 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:30:29,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:30:29,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:30:29,867 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:30:29,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:30:29,867 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:30:29,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:30:29,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:30:29,868 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:30:29,868 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:30:29,868 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:30:29,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:30:29,868 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:30:29,869 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:30:29,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:30:29,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:30:29,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:30:29,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:30:29,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:30:29,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:30:29,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 18:30:29,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 18:30:29,871 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 29e5ebbacca85d2fb1b0bd6d164adabb3234eca085536ff1d3458c8110967632 [2022-07-12 18:30:30,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:30:30,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:30:30,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:30:30,100 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:30:30,103 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:30:30,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c [2022-07-12 18:30:30,147 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdc885c01/1cead7b7ad0a465e85cd7590630fc579/FLAG1471358ea [2022-07-12 18:30:30,459 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:30:30,460 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c [2022-07-12 18:30:30,464 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdc885c01/1cead7b7ad0a465e85cd7590630fc579/FLAG1471358ea [2022-07-12 18:30:30,910 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdc885c01/1cead7b7ad0a465e85cd7590630fc579 [2022-07-12 18:30:30,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:30:30,913 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:30:30,914 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:30:30,915 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:30:30,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:30:30,917 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:30:30" (1/1) ... [2022-07-12 18:30:30,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@824ed32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:30:30, skipping insertion in model container [2022-07-12 18:30:30,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:30:30" (1/1) ... [2022-07-12 18:30:30,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:30:30,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:30:31,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:30:31,058 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 18:30:31,072 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:30:31,081 INFO L208 MainTranslator]: Completed translation [2022-07-12 18:30:31,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:30:31 WrapperNode [2022-07-12 18:30:31,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:30:31,083 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 18:30:31,083 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 18:30:31,083 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 18:30:31,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:30:31" (1/1) ... [2022-07-12 18:30:31,092 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:30:31" (1/1) ... [2022-07-12 18:30:31,106 INFO L137 Inliner]: procedures = 10, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 45 [2022-07-12 18:30:31,108 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 18:30:31,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 18:30:31,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 18:30:31,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 18:30:31,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:30:31" (1/1) ... [2022-07-12 18:30:31,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:30:31" (1/1) ... [2022-07-12 18:30:31,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:30:31" (1/1) ... [2022-07-12 18:30:31,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:30:31" (1/1) ... [2022-07-12 18:30:31,130 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:30:31" (1/1) ... [2022-07-12 18:30:31,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:30:31" (1/1) ... [2022-07-12 18:30:31,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:30:31" (1/1) ... [2022-07-12 18:30:31,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 18:30:31,141 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 18:30:31,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 18:30:31,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 18:30:31,143 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:30:31" (1/1) ... [2022-07-12 18:30:31,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:30:31,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:30:31,165 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 18:30:31,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 18:30:31,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 18:30:31,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 18:30:31,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 18:30:31,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 18:30:31,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 18:30:31,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 18:30:31,242 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 18:30:31,243 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 18:30:31,397 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 18:30:31,401 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 18:30:31,402 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 18:30:31,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:30:31 BoogieIcfgContainer [2022-07-12 18:30:31,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 18:30:31,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 18:30:31,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 18:30:31,421 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 18:30:31,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:30:30" (1/3) ... [2022-07-12 18:30:31,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da5e34d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:30:31, skipping insertion in model container [2022-07-12 18:30:31,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:30:31" (2/3) ... [2022-07-12 18:30:31,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da5e34d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:30:31, skipping insertion in model container [2022-07-12 18:30:31,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:30:31" (3/3) ... [2022-07-12 18:30:31,424 INFO L111 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-3.c [2022-07-12 18:30:31,439 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 18:30:31,439 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-07-12 18:30:31,469 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 18:30:31,480 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@d3a8b4d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6329016b [2022-07-12 18:30:31,480 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-07-12 18:30:31,484 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) [2022-07-12 18:30:31,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-12 18:30:31,491 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:31,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-12 18:30:31,492 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)] === [2022-07-12 18:30:31,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:31,498 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-07-12 18:30:31,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:31,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514108021] [2022-07-12 18:30:31,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:31,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:31,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:31,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514108021] [2022-07-12 18:30:31,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514108021] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:30:31,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:30:31,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:30:31,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707533613] [2022-07-12 18:30:31,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:30:31,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:30:31,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:31,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:30:31,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:30:31,662 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) [2022-07-12 18:30:31,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:30:31,702 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-07-12 18:30:31,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:30:31,705 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 [2022-07-12 18:30:31,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:30:31,710 INFO L225 Difference]: With dead ends: 30 [2022-07-12 18:30:31,710 INFO L226 Difference]: Without dead ends: 28 [2022-07-12 18:30:31,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:30:31,716 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 [2022-07-12 18:30:31,717 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] [2022-07-12 18:30:31,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-12 18:30:31,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-07-12 18:30:31,741 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) [2022-07-12 18:30:31,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-07-12 18:30:31,742 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 4 [2022-07-12 18:30:31,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:30:31,743 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-07-12 18:30:31,743 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) [2022-07-12 18:30:31,743 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-07-12 18:30:31,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-12 18:30:31,743 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:31,744 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-12 18:30:31,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 18:30:31,744 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)] === [2022-07-12 18:30:31,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:31,746 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-07-12 18:30:31,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:31,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053019677] [2022-07-12 18:30:31,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:31,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:31,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:31,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:31,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:31,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053019677] [2022-07-12 18:30:31,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053019677] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:30:31,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:30:31,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:30:31,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118155569] [2022-07-12 18:30:31,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:30:31,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:30:31,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:31,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:30:31,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:30:31,823 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) [2022-07-12 18:30:31,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:30:31,856 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2022-07-12 18:30:31,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:30:31,857 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 [2022-07-12 18:30:31,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:30:31,859 INFO L225 Difference]: With dead ends: 32 [2022-07-12 18:30:31,859 INFO L226 Difference]: Without dead ends: 32 [2022-07-12 18:30:31,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:30:31,863 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 [2022-07-12 18:30:31,863 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] [2022-07-12 18:30:31,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-12 18:30:31,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-07-12 18:30:31,869 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) [2022-07-12 18:30:31,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-07-12 18:30:31,870 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 4 [2022-07-12 18:30:31,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:30:31,871 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-07-12 18:30:31,871 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) [2022-07-12 18:30:31,871 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-07-12 18:30:31,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 18:30:31,871 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:31,872 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-07-12 18:30:31,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 18:30:31,873 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)] === [2022-07-12 18:30:31,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:31,873 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2022-07-12 18:30:31,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:31,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18114858] [2022-07-12 18:30:31,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:31,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:31,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:31,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:31,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18114858] [2022-07-12 18:30:31,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18114858] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:30:31,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749144939] [2022-07-12 18:30:31,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:31,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:31,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:30:31,983 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:30:31,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 18:30:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:32,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:30:32,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:30:32,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:30:32,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:32,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:30:32,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:32,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749144939] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:30:32,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:30:32,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-07-12 18:30:32,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620669739] [2022-07-12 18:30:32,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:30:32,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 18:30:32,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:32,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 18:30:32,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:30:32,181 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) [2022-07-12 18:30:32,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:30:32,303 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2022-07-12 18:30:32,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:30:32,304 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 [2022-07-12 18:30:32,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:30:32,304 INFO L225 Difference]: With dead ends: 39 [2022-07-12 18:30:32,305 INFO L226 Difference]: Without dead ends: 39 [2022-07-12 18:30:32,306 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 [2022-07-12 18:30:32,308 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 [2022-07-12 18:30:32,309 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] [2022-07-12 18:30:32,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-12 18:30:32,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-07-12 18:30:32,315 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) [2022-07-12 18:30:32,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2022-07-12 18:30:32,317 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 8 [2022-07-12 18:30:32,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:30:32,317 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2022-07-12 18:30:32,317 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) [2022-07-12 18:30:32,318 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2022-07-12 18:30:32,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-12 18:30:32,318 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:32,318 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-07-12 18:30:32,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 18:30:32,530 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 [2022-07-12 18:30:32,531 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)] === [2022-07-12 18:30:32,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:32,531 INFO L85 PathProgramCache]: Analyzing trace with hash 519338591, now seen corresponding path program 1 times [2022-07-12 18:30:32,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:32,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10059236] [2022-07-12 18:30:32,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:32,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:32,586 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-12 18:30:32,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:32,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10059236] [2022-07-12 18:30:32,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10059236] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:30:32,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:30:32,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:30:32,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376848746] [2022-07-12 18:30:32,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:30:32,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:30:32,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:32,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:30:32,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:30:32,589 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) [2022-07-12 18:30:32,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:30:32,622 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2022-07-12 18:30:32,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:30:32,622 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 [2022-07-12 18:30:32,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:30:32,623 INFO L225 Difference]: With dead ends: 36 [2022-07-12 18:30:32,623 INFO L226 Difference]: Without dead ends: 36 [2022-07-12 18:30:32,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:30:32,624 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 [2022-07-12 18:30:32,624 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] [2022-07-12 18:30:32,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-12 18:30:32,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-07-12 18:30:32,626 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) [2022-07-12 18:30:32,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-07-12 18:30:32,627 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 21 [2022-07-12 18:30:32,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:30:32,627 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-07-12 18:30:32,627 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) [2022-07-12 18:30:32,627 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-07-12 18:30:32,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-12 18:30:32,628 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:32,628 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-07-12 18:30:32,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 18:30:32,628 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)] === [2022-07-12 18:30:32,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:32,629 INFO L85 PathProgramCache]: Analyzing trace with hash 519338592, now seen corresponding path program 1 times [2022-07-12 18:30:32,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:32,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909164029] [2022-07-12 18:30:32,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:32,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:32,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:32,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909164029] [2022-07-12 18:30:32,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909164029] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:30:32,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870326513] [2022-07-12 18:30:32,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:32,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:32,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:30:32,696 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:30:32,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 18:30:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:32,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 18:30:32,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:30:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:32,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:30:32,839 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:32,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870326513] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:30:32,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:30:32,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-12 18:30:32,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540754973] [2022-07-12 18:30:32,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:30:32,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 18:30:32,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:32,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 18:30:32,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:30:32,845 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) [2022-07-12 18:30:32,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:30:32,891 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2022-07-12 18:30:32,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 18:30:32,892 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 [2022-07-12 18:30:32,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:30:32,892 INFO L225 Difference]: With dead ends: 60 [2022-07-12 18:30:32,892 INFO L226 Difference]: Without dead ends: 60 [2022-07-12 18:30:32,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:30:32,893 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 [2022-07-12 18:30:32,894 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] [2022-07-12 18:30:32,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-12 18:30:32,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-12 18:30:32,904 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) [2022-07-12 18:30:32,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-07-12 18:30:32,905 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 21 [2022-07-12 18:30:32,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:30:32,905 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-07-12 18:30:32,905 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) [2022-07-12 18:30:32,905 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-07-12 18:30:32,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-12 18:30:32,906 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:32,906 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1] [2022-07-12 18:30:32,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 18:30:33,106 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 [2022-07-12 18:30:33,107 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)] === [2022-07-12 18:30:33,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:33,107 INFO L85 PathProgramCache]: Analyzing trace with hash 649821198, now seen corresponding path program 2 times [2022-07-12 18:30:33,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:33,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255975653] [2022-07-12 18:30:33,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:33,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:33,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:33,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:33,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255975653] [2022-07-12 18:30:33,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255975653] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:30:33,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535517583] [2022-07-12 18:30:33,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:30:33,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:33,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:30:33,215 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:30:33,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 18:30:33,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 18:30:33,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:30:33,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:30:33,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:30:33,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:30:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-07-12 18:30:33,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:30:33,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535517583] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:30:33,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:30:33,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2022-07-12 18:30:33,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026353810] [2022-07-12 18:30:33,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:30:33,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:30:33,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:33,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:30:33,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2022-07-12 18:30:33,389 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) [2022-07-12 18:30:33,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:30:33,434 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2022-07-12 18:30:33,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:30:33,434 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 [2022-07-12 18:30:33,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:30:33,435 INFO L225 Difference]: With dead ends: 73 [2022-07-12 18:30:33,435 INFO L226 Difference]: Without dead ends: 73 [2022-07-12 18:30:33,435 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 [2022-07-12 18:30:33,436 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 [2022-07-12 18:30:33,436 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] [2022-07-12 18:30:33,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-12 18:30:33,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2022-07-12 18:30:33,439 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) [2022-07-12 18:30:33,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2022-07-12 18:30:33,439 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 45 [2022-07-12 18:30:33,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:30:33,440 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2022-07-12 18:30:33,440 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) [2022-07-12 18:30:33,440 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2022-07-12 18:30:33,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-12 18:30:33,441 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:33,441 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:30:33,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 18:30:33,657 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 [2022-07-12 18:30:33,657 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)] === [2022-07-12 18:30:33,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:33,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1405678828, now seen corresponding path program 1 times [2022-07-12 18:30:33,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:33,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356879955] [2022-07-12 18:30:33,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:33,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:33,773 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:30:33,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:33,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356879955] [2022-07-12 18:30:33,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356879955] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:30:33,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281696564] [2022-07-12 18:30:33,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:33,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:33,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:30:33,775 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:30:33,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 18:30:33,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:33,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 18:30:33,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:30:33,883 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:30:33,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:30:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:30:34,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281696564] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:30:34,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:30:34,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-12 18:30:34,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297216650] [2022-07-12 18:30:34,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:30:34,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 18:30:34,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:34,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 18:30:34,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-12 18:30:34,072 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) [2022-07-12 18:30:34,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:30:34,145 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2022-07-12 18:30:34,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 18:30:34,146 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 [2022-07-12 18:30:34,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:30:34,147 INFO L225 Difference]: With dead ends: 115 [2022-07-12 18:30:34,147 INFO L226 Difference]: Without dead ends: 115 [2022-07-12 18:30:34,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-12 18:30:34,148 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 66 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-07-12 18:30:34,148 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] [2022-07-12 18:30:34,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-12 18:30:34,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-07-12 18:30:34,151 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) [2022-07-12 18:30:34,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2022-07-12 18:30:34,152 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 48 [2022-07-12 18:30:34,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:30:34,152 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2022-07-12 18:30:34,153 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) [2022-07-12 18:30:34,153 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2022-07-12 18:30:34,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-12 18:30:34,154 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:34,154 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:30:34,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 18:30:34,359 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 [2022-07-12 18:30:34,359 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)] === [2022-07-12 18:30:34,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:34,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1050107376, now seen corresponding path program 2 times [2022-07-12 18:30:34,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:34,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786400091] [2022-07-12 18:30:34,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:34,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:34,671 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:30:34,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:34,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786400091] [2022-07-12 18:30:34,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786400091] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:30:34,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782632445] [2022-07-12 18:30:34,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:30:34,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:34,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:30:34,673 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:30:34,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 18:30:34,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:30:34,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:30:34,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 18:30:34,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:30:34,862 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:30:34,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:30:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:30:35,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782632445] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:30:35,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:30:35,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-07-12 18:30:35,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420922946] [2022-07-12 18:30:35,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:30:35,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-12 18:30:35,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:35,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-12 18:30:35,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-12 18:30:35,508 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) [2022-07-12 18:30:35,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:30:35,660 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2022-07-12 18:30:35,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-12 18:30:35,661 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 [2022-07-12 18:30:35,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:30:35,662 INFO L225 Difference]: With dead ends: 211 [2022-07-12 18:30:35,662 INFO L226 Difference]: Without dead ends: 211 [2022-07-12 18:30:35,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-12 18:30:35,663 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 [2022-07-12 18:30:35,663 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] [2022-07-12 18:30:35,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-07-12 18:30:35,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2022-07-12 18:30:35,671 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) [2022-07-12 18:30:35,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 215 transitions. [2022-07-12 18:30:35,673 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 215 transitions. Word has length 96 [2022-07-12 18:30:35,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:30:35,674 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 215 transitions. [2022-07-12 18:30:35,674 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) [2022-07-12 18:30:35,674 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 215 transitions. [2022-07-12 18:30:35,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-07-12 18:30:35,679 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:35,679 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:30:35,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 18:30:35,903 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 [2022-07-12 18:30:35,903 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)] === [2022-07-12 18:30:35,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:35,904 INFO L85 PathProgramCache]: Analyzing trace with hash -17107880, now seen corresponding path program 3 times [2022-07-12 18:30:35,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:35,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016540737] [2022-07-12 18:30:35,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:35,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:36,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:30:36,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:36,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016540737] [2022-07-12 18:30:36,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016540737] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:30:36,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008564172] [2022-07-12 18:30:36,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:30:36,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:36,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:30:36,823 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:30:36,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 18:30:36,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 18:30:36,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:30:36,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 18:30:36,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:30:36,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:30:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2022-07-12 18:30:37,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:30:37,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2022-07-12 18:30:37,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008564172] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:30:37,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:30:37,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 5, 5] total 57 [2022-07-12 18:30:37,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500722851] [2022-07-12 18:30:37,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:30:37,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-12 18:30:37,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:37,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-12 18:30:37,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1202, Invalid=1990, Unknown=0, NotChecked=0, Total=3192 [2022-07-12 18:30:37,880 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) [2022-07-12 18:30:39,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:30:39,288 INFO L93 Difference]: Finished difference Result 250 states and 255 transitions. [2022-07-12 18:30:39,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-12 18:30:39,288 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 [2022-07-12 18:30:39,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:30:39,292 INFO L225 Difference]: With dead ends: 250 [2022-07-12 18:30:39,292 INFO L226 Difference]: Without dead ends: 250 [2022-07-12 18:30:39,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1752 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3640, Invalid=8132, Unknown=0, NotChecked=0, Total=11772 [2022-07-12 18:30:39,297 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 [2022-07-12 18:30:39,297 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] [2022-07-12 18:30:39,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-07-12 18:30:39,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 228. [2022-07-12 18:30:39,312 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) [2022-07-12 18:30:39,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 236 transitions. [2022-07-12 18:30:39,313 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 236 transitions. Word has length 192 [2022-07-12 18:30:39,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:30:39,313 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 236 transitions. [2022-07-12 18:30:39,314 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) [2022-07-12 18:30:39,314 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 236 transitions. [2022-07-12 18:30:39,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-07-12 18:30:39,315 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:39,317 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:30:39,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 18:30:39,517 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 [2022-07-12 18:30:39,517 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)] === [2022-07-12 18:30:39,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:39,518 INFO L85 PathProgramCache]: Analyzing trace with hash 602519778, now seen corresponding path program 1 times [2022-07-12 18:30:39,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:39,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799018828] [2022-07-12 18:30:39,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:39,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4371 trivial. 0 not checked. [2022-07-12 18:30:39,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:39,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799018828] [2022-07-12 18:30:39,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799018828] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:30:39,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:30:39,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:30:39,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671060644] [2022-07-12 18:30:39,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:30:39,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:30:39,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:39,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:30:39,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:30:39,619 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) [2022-07-12 18:30:39,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:30:39,624 INFO L93 Difference]: Finished difference Result 227 states and 235 transitions. [2022-07-12 18:30:39,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:30:39,625 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 [2022-07-12 18:30:39,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:30:39,626 INFO L225 Difference]: With dead ends: 227 [2022-07-12 18:30:39,627 INFO L226 Difference]: Without dead ends: 227 [2022-07-12 18:30:39,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:30:39,627 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 [2022-07-12 18:30:39,628 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] [2022-07-12 18:30:39,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-07-12 18:30:39,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-07-12 18:30:39,631 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) [2022-07-12 18:30:39,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 235 transitions. [2022-07-12 18:30:39,632 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 235 transitions. Word has length 196 [2022-07-12 18:30:39,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:30:39,632 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 235 transitions. [2022-07-12 18:30:39,632 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) [2022-07-12 18:30:39,633 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 235 transitions. [2022-07-12 18:30:39,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-07-12 18:30:39,633 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:39,634 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:30:39,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 18:30:39,634 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)] === [2022-07-12 18:30:39,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:39,635 INFO L85 PathProgramCache]: Analyzing trace with hash -799075579, now seen corresponding path program 1 times [2022-07-12 18:30:39,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:39,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945820034] [2022-07-12 18:30:39,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:39,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:39,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:40,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:40,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945820034] [2022-07-12 18:30:40,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945820034] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:30:40,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130501407] [2022-07-12 18:30:40,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:40,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:40,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:30:40,478 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:30:40,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 18:30:40,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:40,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-12 18:30:40,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:30:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:40,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:30:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:42,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130501407] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:30:42,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:30:42,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2022-07-12 18:30:42,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568194903] [2022-07-12 18:30:42,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:30:42,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-07-12 18:30:42,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:42,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-07-12 18:30:43,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2022-07-12 18:30:43,001 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) [2022-07-12 18:30:43,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:30:43,348 INFO L93 Difference]: Finished difference Result 423 states and 431 transitions. [2022-07-12 18:30:43,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-07-12 18:30:43,348 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 [2022-07-12 18:30:43,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:30:43,350 INFO L225 Difference]: With dead ends: 423 [2022-07-12 18:30:43,350 INFO L226 Difference]: Without dead ends: 423 [2022-07-12 18:30:43,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2022-07-12 18:30:43,352 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, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:30:43,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 211 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:30:43,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-07-12 18:30:43,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 423. [2022-07-12 18:30:43,356 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) [2022-07-12 18:30:43,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 431 transitions. [2022-07-12 18:30:43,357 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 431 transitions. Word has length 198 [2022-07-12 18:30:43,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:30:43,357 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 431 transitions. [2022-07-12 18:30:43,357 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) [2022-07-12 18:30:43,357 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 431 transitions. [2022-07-12 18:30:43,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2022-07-12 18:30:43,360 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:43,360 INFO L195 NwaCegarLoop]: trace histogram [96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:30:43,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 18:30:43,577 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 [2022-07-12 18:30:43,577 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)] === [2022-07-12 18:30:43,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:43,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1623122088, now seen corresponding path program 2 times [2022-07-12 18:30:43,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:43,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228616534] [2022-07-12 18:30:43,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:43,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:43,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:46,494 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:30:46,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:46,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228616534] [2022-07-12 18:30:46,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228616534] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:30:46,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924391576] [2022-07-12 18:30:46,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:30:46,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:46,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:30:46,496 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:30:46,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 18:30:46,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 18:30:46,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:30:46,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 18:30:46,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:30:47,541 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18336 trivial. 0 not checked. [2022-07-12 18:30:47,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:30:47,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924391576] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:30:47,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:30:47,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [99] total 101 [2022-07-12 18:30:47,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54126160] [2022-07-12 18:30:47,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:30:47,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:30:47,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:47,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:30:47,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4855, Invalid=5245, Unknown=0, NotChecked=0, Total=10100 [2022-07-12 18:30:47,545 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) [2022-07-12 18:30:47,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:30:47,548 INFO L93 Difference]: Finished difference Result 429 states and 437 transitions. [2022-07-12 18:30:47,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:30:47,548 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 [2022-07-12 18:30:47,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:30:47,549 INFO L225 Difference]: With dead ends: 429 [2022-07-12 18:30:47,549 INFO L226 Difference]: Without dead ends: 425 [2022-07-12 18:30:47,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4855, Invalid=5245, Unknown=0, NotChecked=0, Total=10100 [2022-07-12 18:30:47,552 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 [2022-07-12 18:30:47,553 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] [2022-07-12 18:30:47,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-07-12 18:30:47,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 425. [2022-07-12 18:30:47,557 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) [2022-07-12 18:30:47,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 433 transitions. [2022-07-12 18:30:47,558 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 433 transitions. Word has length 394 [2022-07-12 18:30:47,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:30:47,558 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 433 transitions. [2022-07-12 18:30:47,558 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) [2022-07-12 18:30:47,558 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 433 transitions. [2022-07-12 18:30:47,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2022-07-12 18:30:47,568 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:30:47,568 INFO L195 NwaCegarLoop]: trace histogram [96, 96, 96, 96, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:30:47,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 18:30:47,786 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 [2022-07-12 18:30:47,787 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)] === [2022-07-12 18:30:47,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:30:47,788 INFO L85 PathProgramCache]: Analyzing trace with hash -342671882, now seen corresponding path program 1 times [2022-07-12 18:30:47,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:30:47,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095328178] [2022-07-12 18:30:47,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:47,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:30:47,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 18338 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:30:50,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:30:50,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095328178] [2022-07-12 18:30:50,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095328178] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:30:50,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212394289] [2022-07-12 18:30:50,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:30:50,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:30:50,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:30:50,580 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:30:50,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 18:30:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:30:50,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 1407 conjuncts, 98 conjunts are in the unsatisfiable core [2022-07-12 18:30:50,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:30:51,203 INFO L134 CoverageAnalysis]: Checked inductivity of 18338 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:30:51,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:30:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 18338 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:30:59,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212394289] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:30:59,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:30:59,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 197 [2022-07-12 18:30:59,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273745105] [2022-07-12 18:30:59,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:30:59,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2022-07-12 18:30:59,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:30:59,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2022-07-12 18:30:59,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2022-07-12 18:30:59,341 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) [2022-07-12 18:31:00,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:31:00,404 INFO L93 Difference]: Finished difference Result 817 states and 825 transitions. [2022-07-12 18:31:00,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2022-07-12 18:31:00,405 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 [2022-07-12 18:31:00,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:31:00,407 INFO L225 Difference]: With dead ends: 817 [2022-07-12 18:31:00,407 INFO L226 Difference]: Without dead ends: 817 [2022-07-12 18:31:00,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 891 GetRequests, 696 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2022-07-12 18:31:00,409 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 873 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:31:00,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 324 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:31:00,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-07-12 18:31:00,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 817. [2022-07-12 18:31:00,416 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) [2022-07-12 18:31:00,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 825 transitions. [2022-07-12 18:31:00,417 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 825 transitions. Word has length 397 [2022-07-12 18:31:00,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:31:00,418 INFO L495 AbstractCegarLoop]: Abstraction has 817 states and 825 transitions. [2022-07-12 18:31:00,418 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) [2022-07-12 18:31:00,419 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 825 transitions. [2022-07-12 18:31:00,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 790 [2022-07-12 18:31:00,422 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:31:00,423 INFO L195 NwaCegarLoop]: trace histogram [194, 194, 194, 194, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:31:00,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 18:31:00,635 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 [2022-07-12 18:31:00,635 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)] === [2022-07-12 18:31:00,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:31:00,636 INFO L85 PathProgramCache]: Analyzing trace with hash -2100549616, now seen corresponding path program 2 times [2022-07-12 18:31:00,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:31:00,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235549743] [2022-07-12 18:31:00,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:31:00,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:31:00,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:31:11,411 INFO L134 CoverageAnalysis]: Checked inductivity of 75080 backedges. 0 proven. 75078 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:31:11,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:31:11,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235549743] [2022-07-12 18:31:11,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235549743] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:31:11,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51603054] [2022-07-12 18:31:11,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:31:11,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:31:11,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:31:11,414 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:31:11,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 18:31:11,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 18:31:11,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:31:11,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 18:31:11,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:31:13,485 INFO L134 CoverageAnalysis]: Checked inductivity of 75080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75080 trivial. 0 not checked. [2022-07-12 18:31:13,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:31:13,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51603054] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:31:13,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:31:13,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [197] total 199 [2022-07-12 18:31:13,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334766887] [2022-07-12 18:31:13,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:31:13,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:31:13,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:31:13,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:31:13,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19310, Invalid=20092, Unknown=0, NotChecked=0, Total=39402 [2022-07-12 18:31:13,490 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) [2022-07-12 18:31:13,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:31:13,493 INFO L93 Difference]: Finished difference Result 837 states and 851 transitions. [2022-07-12 18:31:13,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:31:13,493 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 [2022-07-12 18:31:13,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:31:13,495 INFO L225 Difference]: With dead ends: 837 [2022-07-12 18:31:13,496 INFO L226 Difference]: Without dead ends: 833 [2022-07-12 18:31:13,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 985 GetRequests, 788 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=19310, Invalid=20092, Unknown=0, NotChecked=0, Total=39402 [2022-07-12 18:31:13,498 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 [2022-07-12 18:31:13,498 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] [2022-07-12 18:31:13,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-07-12 18:31:13,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 828. [2022-07-12 18:31:13,505 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) [2022-07-12 18:31:13,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 841 transitions. [2022-07-12 18:31:13,506 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 841 transitions. Word has length 789 [2022-07-12 18:31:13,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:31:13,507 INFO L495 AbstractCegarLoop]: Abstraction has 828 states and 841 transitions. [2022-07-12 18:31:13,507 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) [2022-07-12 18:31:13,507 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 841 transitions. [2022-07-12 18:31:13,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 794 [2022-07-12 18:31:13,511 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:31:13,512 INFO L195 NwaCegarLoop]: trace histogram [194, 194, 194, 194, 4, 4, 4, 1, 1, 1, 1, 1] [2022-07-12 18:31:13,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 18:31:13,719 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 [2022-07-12 18:31:13,719 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)] === [2022-07-12 18:31:13,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:31:13,720 INFO L85 PathProgramCache]: Analyzing trace with hash 708285286, now seen corresponding path program 4 times [2022-07-12 18:31:13,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:31:13,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912494419] [2022-07-12 18:31:13,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:31:13,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:31:14,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:31:24,567 INFO L134 CoverageAnalysis]: Checked inductivity of 75100 backedges. 0 proven. 75078 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-12 18:31:24,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:31:24,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912494419] [2022-07-12 18:31:24,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912494419] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:31:24,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350292740] [2022-07-12 18:31:24,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:31:24,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:31:24,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:31:24,572 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:31:24,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process