./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0218.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f4b24e32 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/memsafety/test-0218.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d0144744ce48339ff9171f70682ff014d707c8affcdd45929fe7382e980b7693 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:16:38,772 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:16:38,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:16:38,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:16:38,810 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:16:38,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:16:38,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:16:38,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:16:38,816 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:16:38,817 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:16:38,818 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:16:38,819 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:16:38,819 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:16:38,820 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:16:38,821 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:16:38,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:16:38,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:16:38,824 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:16:38,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:16:38,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:16:38,829 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:16:38,830 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:16:38,831 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:16:38,832 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:16:38,833 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:16:38,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:16:38,836 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:16:38,836 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:16:38,837 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:16:38,838 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:16:38,838 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:16:38,839 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:16:38,839 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:16:38,840 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:16:38,841 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:16:38,842 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:16:38,843 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:16:38,844 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:16:38,844 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:16:38,845 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:16:38,846 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:16:38,847 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:16:38,849 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 06:16:38,869 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:16:38,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:16:38,870 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:16:38,870 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:16:38,871 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:16:38,871 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:16:38,872 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:16:38,872 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:16:38,872 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:16:38,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:16:38,872 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:16:38,872 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:16:38,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:16:38,873 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:16:38,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:16:38,873 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:16:38,873 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:16:38,874 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:16:38,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:16:38,874 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:16:38,874 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:16:38,874 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:16:38,874 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:16:38,875 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:16:38,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:16:38,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:16:38,875 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:16:38,875 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:16:38,876 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 06:16:38,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 06:16:38,876 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d0144744ce48339ff9171f70682ff014d707c8affcdd45929fe7382e980b7693 [2022-07-14 06:16:39,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:16:39,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:16:39,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:16:39,150 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:16:39,155 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:16:39,157 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0218.i [2022-07-14 06:16:39,221 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/236f131b4/09555f8ecae141d6bc674182cb1e0c3c/FLAGe6b11723d [2022-07-14 06:16:39,609 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:16:39,610 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0218.i [2022-07-14 06:16:39,621 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/236f131b4/09555f8ecae141d6bc674182cb1e0c3c/FLAGe6b11723d [2022-07-14 06:16:39,982 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/236f131b4/09555f8ecae141d6bc674182cb1e0c3c [2022-07-14 06:16:39,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:16:39,985 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:16:39,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:16:39,988 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:16:39,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:16:39,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:16:39" (1/1) ... [2022-07-14 06:16:39,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4703a687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:16:39, skipping insertion in model container [2022-07-14 06:16:39,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:16:39" (1/1) ... [2022-07-14 06:16:40,002 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:16:40,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:16:40,471 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:16:40,482 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 06:16:40,543 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:16:40,585 INFO L208 MainTranslator]: Completed translation [2022-07-14 06:16:40,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:16:40 WrapperNode [2022-07-14 06:16:40,586 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:16:40,587 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 06:16:40,588 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 06:16:40,590 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 06:16:40,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:16:40" (1/1) ... [2022-07-14 06:16:40,616 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:16:40" (1/1) ... [2022-07-14 06:16:40,644 INFO L137 Inliner]: procedures = 181, calls = 46, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 216 [2022-07-14 06:16:40,645 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 06:16:40,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 06:16:40,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 06:16:40,646 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 06:16:40,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:16:40" (1/1) ... [2022-07-14 06:16:40,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:16:40" (1/1) ... [2022-07-14 06:16:40,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:16:40" (1/1) ... [2022-07-14 06:16:40,658 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:16:40" (1/1) ... [2022-07-14 06:16:40,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:16:40" (1/1) ... [2022-07-14 06:16:40,672 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:16:40" (1/1) ... [2022-07-14 06:16:40,674 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:16:40" (1/1) ... [2022-07-14 06:16:40,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 06:16:40,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 06:16:40,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 06:16:40,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 06:16:40,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:16:40" (1/1) ... [2022-07-14 06:16:40,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:16:40,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:16:40,724 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) [2022-07-14 06:16:40,729 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 [2022-07-14 06:16:40,757 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2022-07-14 06:16:40,758 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2022-07-14 06:16:40,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-14 06:16:40,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-14 06:16:40,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-14 06:16:40,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-14 06:16:40,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 06:16:40,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-14 06:16:40,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-14 06:16:40,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 06:16:40,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 06:16:40,859 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 06:16:40,860 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 06:16:41,359 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 06:16:41,366 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 06:16:41,367 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-14 06:16:41,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:16:41 BoogieIcfgContainer [2022-07-14 06:16:41,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 06:16:41,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 06:16:41,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 06:16:41,374 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 06:16:41,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 06:16:39" (1/3) ... [2022-07-14 06:16:41,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dae6b3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:16:41, skipping insertion in model container [2022-07-14 06:16:41,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:16:40" (2/3) ... [2022-07-14 06:16:41,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dae6b3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:16:41, skipping insertion in model container [2022-07-14 06:16:41,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:16:41" (3/3) ... [2022-07-14 06:16:41,378 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0218.i [2022-07-14 06:16:41,397 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 06:16:41,397 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 65 error locations. [2022-07-14 06:16:41,456 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 06:16:41,462 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@1a48e98d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5334649e [2022-07-14 06:16:41,462 INFO L358 AbstractCegarLoop]: Starting to check reachability of 65 error locations. [2022-07-14 06:16:41,468 INFO L276 IsEmpty]: Start isEmpty. Operand has 167 states, 98 states have (on average 1.9387755102040816) internal successors, (190), 163 states have internal predecessors, (190), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 06:16:41,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 06:16:41,483 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:41,483 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 06:16:41,484 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:41,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:41,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1074826664, now seen corresponding path program 1 times [2022-07-14 06:16:41,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:41,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98504530] [2022-07-14 06:16:41,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:41,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:41,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:41,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:41,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98504530] [2022-07-14 06:16:41,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98504530] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:41,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:41,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:16:41,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652406599] [2022-07-14 06:16:41,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:41,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-14 06:16:41,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:41,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-14 06:16:41,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-14 06:16:41,725 INFO L87 Difference]: Start difference. First operand has 167 states, 98 states have (on average 1.9387755102040816) internal successors, (190), 163 states have internal predecessors, (190), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:16:41,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:41,757 INFO L93 Difference]: Finished difference Result 167 states and 188 transitions. [2022-07-14 06:16:41,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-14 06:16:41,765 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-14 06:16:41,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:41,777 INFO L225 Difference]: With dead ends: 167 [2022-07-14 06:16:41,777 INFO L226 Difference]: Without dead ends: 165 [2022-07-14 06:16:41,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-14 06:16:41,784 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:41,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:16:41,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-14 06:16:41,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-07-14 06:16:41,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 97 states have (on average 1.8762886597938144) internal successors, (182), 161 states have internal predecessors, (182), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 06:16:41,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 186 transitions. [2022-07-14 06:16:41,845 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 186 transitions. Word has length 6 [2022-07-14 06:16:41,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:41,846 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 186 transitions. [2022-07-14 06:16:41,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:16:41,846 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 186 transitions. [2022-07-14 06:16:41,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 06:16:41,846 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:41,846 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:41,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-14 06:16:41,847 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:41,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:41,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1280321240, now seen corresponding path program 1 times [2022-07-14 06:16:41,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:41,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129918106] [2022-07-14 06:16:41,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:41,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:41,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:41,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:41,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129918106] [2022-07-14 06:16:41,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129918106] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:41,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:41,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-07-14 06:16:41,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737808288] [2022-07-14 06:16:41,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:41,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:16:41,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:41,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:16:41,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:16:41,970 INFO L87 Difference]: Start difference. First operand 165 states and 186 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:16:42,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:42,155 INFO L93 Difference]: Finished difference Result 321 states and 362 transitions. [2022-07-14 06:16:42,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:16:42,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-07-14 06:16:42,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:42,163 INFO L225 Difference]: With dead ends: 321 [2022-07-14 06:16:42,164 INFO L226 Difference]: Without dead ends: 321 [2022-07-14 06:16:42,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:16:42,170 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 167 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:42,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 245 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:16:42,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-07-14 06:16:42,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 227. [2022-07-14 06:16:42,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 156 states have (on average 1.858974358974359) internal successors, (290), 220 states have internal predecessors, (290), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 06:16:42,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 298 transitions. [2022-07-14 06:16:42,188 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 298 transitions. Word has length 7 [2022-07-14 06:16:42,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:42,188 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 298 transitions. [2022-07-14 06:16:42,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:16:42,189 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 298 transitions. [2022-07-14 06:16:42,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 06:16:42,189 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:42,189 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:42,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-14 06:16:42,190 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr58REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:42,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:42,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1280321239, now seen corresponding path program 1 times [2022-07-14 06:16:42,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:42,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830434556] [2022-07-14 06:16:42,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:42,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:42,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:42,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:42,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830434556] [2022-07-14 06:16:42,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830434556] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:42,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:42,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:16:42,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204878941] [2022-07-14 06:16:42,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:42,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:16:42,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:42,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:16:42,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:16:42,315 INFO L87 Difference]: Start difference. First operand 227 states and 298 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:16:42,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:42,453 INFO L93 Difference]: Finished difference Result 245 states and 316 transitions. [2022-07-14 06:16:42,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:16:42,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-07-14 06:16:42,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:42,455 INFO L225 Difference]: With dead ends: 245 [2022-07-14 06:16:42,456 INFO L226 Difference]: Without dead ends: 245 [2022-07-14 06:16:42,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:16:42,463 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 214 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:42,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 253 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:16:42,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-07-14 06:16:42,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 229. [2022-07-14 06:16:42,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 158 states have (on average 1.8544303797468353) internal successors, (293), 222 states have internal predecessors, (293), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 06:16:42,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 301 transitions. [2022-07-14 06:16:42,530 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 301 transitions. Word has length 7 [2022-07-14 06:16:42,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:42,530 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 301 transitions. [2022-07-14 06:16:42,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:16:42,531 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 301 transitions. [2022-07-14 06:16:42,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 06:16:42,531 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:42,531 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:42,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-14 06:16:42,532 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr58REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:42,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:42,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1280321301, now seen corresponding path program 1 times [2022-07-14 06:16:42,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:42,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570385419] [2022-07-14 06:16:42,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:42,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:42,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:42,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:42,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570385419] [2022-07-14 06:16:42,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570385419] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:42,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:42,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:16:42,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484640531] [2022-07-14 06:16:42,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:42,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:16:42,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:42,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:16:42,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:16:42,622 INFO L87 Difference]: Start difference. First operand 229 states and 301 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:16:42,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:42,744 INFO L93 Difference]: Finished difference Result 244 states and 314 transitions. [2022-07-14 06:16:42,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:16:42,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-07-14 06:16:42,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:42,746 INFO L225 Difference]: With dead ends: 244 [2022-07-14 06:16:42,746 INFO L226 Difference]: Without dead ends: 244 [2022-07-14 06:16:42,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:16:42,747 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 196 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:42,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 266 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:16:42,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-07-14 06:16:42,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 226. [2022-07-14 06:16:42,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 156 states have (on average 1.8461538461538463) internal successors, (288), 219 states have internal predecessors, (288), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 06:16:42,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 296 transitions. [2022-07-14 06:16:42,755 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 296 transitions. Word has length 7 [2022-07-14 06:16:42,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:42,756 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 296 transitions. [2022-07-14 06:16:42,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:16:42,756 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 296 transitions. [2022-07-14 06:16:42,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-14 06:16:42,757 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:42,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:42,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-14 06:16:42,757 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:42,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:42,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1554740496, now seen corresponding path program 1 times [2022-07-14 06:16:42,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:42,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150811430] [2022-07-14 06:16:42,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:42,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:42,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:42,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:42,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:42,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150811430] [2022-07-14 06:16:42,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150811430] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:42,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:42,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:16:42,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678957698] [2022-07-14 06:16:42,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:42,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:16:42,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:42,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:16:42,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:16:42,873 INFO L87 Difference]: Start difference. First operand 226 states and 296 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:16:43,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:43,030 INFO L93 Difference]: Finished difference Result 402 states and 517 transitions. [2022-07-14 06:16:43,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:16:43,031 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-14 06:16:43,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:43,033 INFO L225 Difference]: With dead ends: 402 [2022-07-14 06:16:43,034 INFO L226 Difference]: Without dead ends: 402 [2022-07-14 06:16:43,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:16:43,035 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 145 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:43,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 782 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:16:43,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-07-14 06:16:43,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 292. [2022-07-14 06:16:43,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 216 states have (on average 1.7916666666666667) internal successors, (387), 281 states have internal predecessors, (387), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-14 06:16:43,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 403 transitions. [2022-07-14 06:16:43,045 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 403 transitions. Word has length 10 [2022-07-14 06:16:43,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:43,046 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 403 transitions. [2022-07-14 06:16:43,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:16:43,046 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 403 transitions. [2022-07-14 06:16:43,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-14 06:16:43,047 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:43,047 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:43,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-14 06:16:43,047 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:43,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:43,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1552893454, now seen corresponding path program 1 times [2022-07-14 06:16:43,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:43,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570042674] [2022-07-14 06:16:43,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:43,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:43,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:43,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:43,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:43,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570042674] [2022-07-14 06:16:43,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570042674] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:43,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:43,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:16:43,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574562820] [2022-07-14 06:16:43,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:43,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:16:43,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:43,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:16:43,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:16:43,189 INFO L87 Difference]: Start difference. First operand 292 states and 403 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:16:43,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:43,426 INFO L93 Difference]: Finished difference Result 392 states and 506 transitions. [2022-07-14 06:16:43,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:16:43,427 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-14 06:16:43,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:43,429 INFO L225 Difference]: With dead ends: 392 [2022-07-14 06:16:43,430 INFO L226 Difference]: Without dead ends: 392 [2022-07-14 06:16:43,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:16:43,432 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 131 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:43,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 791 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:16:43,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-07-14 06:16:43,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 292. [2022-07-14 06:16:43,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 216 states have (on average 1.7916666666666667) internal successors, (387), 281 states have internal predecessors, (387), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-14 06:16:43,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 403 transitions. [2022-07-14 06:16:43,448 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 403 transitions. Word has length 10 [2022-07-14 06:16:43,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:43,448 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 403 transitions. [2022-07-14 06:16:43,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:16:43,448 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 403 transitions. [2022-07-14 06:16:43,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-14 06:16:43,449 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:43,450 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:43,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-14 06:16:43,450 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:43,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:43,451 INFO L85 PathProgramCache]: Analyzing trace with hash 952313872, now seen corresponding path program 1 times [2022-07-14 06:16:43,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:43,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678923720] [2022-07-14 06:16:43,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:43,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:43,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:43,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:43,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678923720] [2022-07-14 06:16:43,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678923720] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:43,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:43,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:16:43,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101435052] [2022-07-14 06:16:43,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:43,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:16:43,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:43,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:16:43,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:16:43,499 INFO L87 Difference]: Start difference. First operand 292 states and 403 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:16:43,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:43,594 INFO L93 Difference]: Finished difference Result 347 states and 456 transitions. [2022-07-14 06:16:43,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:16:43,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-14 06:16:43,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:43,597 INFO L225 Difference]: With dead ends: 347 [2022-07-14 06:16:43,598 INFO L226 Difference]: Without dead ends: 340 [2022-07-14 06:16:43,598 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 [2022-07-14 06:16:43,599 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 70 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:43,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 279 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:16:43,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-07-14 06:16:43,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 289. [2022-07-14 06:16:43,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 213 states have (on average 1.7934272300469483) internal successors, (382), 278 states have internal predecessors, (382), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-14 06:16:43,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 398 transitions. [2022-07-14 06:16:43,608 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 398 transitions. Word has length 11 [2022-07-14 06:16:43,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:43,608 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 398 transitions. [2022-07-14 06:16:43,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:16:43,609 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 398 transitions. [2022-07-14 06:16:43,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-14 06:16:43,609 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:43,609 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:43,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-14 06:16:43,610 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:43,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:43,610 INFO L85 PathProgramCache]: Analyzing trace with hash -41167145, now seen corresponding path program 1 times [2022-07-14 06:16:43,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:43,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020184329] [2022-07-14 06:16:43,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:43,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:43,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:43,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-14 06:16:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:43,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:43,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020184329] [2022-07-14 06:16:43,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020184329] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:43,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:43,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:16:43,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570258714] [2022-07-14 06:16:43,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:43,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:16:43,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:43,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:16:43,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:16:43,657 INFO L87 Difference]: Start difference. First operand 289 states and 398 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:43,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:43,876 INFO L93 Difference]: Finished difference Result 490 states and 599 transitions. [2022-07-14 06:16:43,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:16:43,876 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-07-14 06:16:43,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:43,879 INFO L225 Difference]: With dead ends: 490 [2022-07-14 06:16:43,879 INFO L226 Difference]: Without dead ends: 490 [2022-07-14 06:16:43,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:16:43,879 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 319 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:43,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 426 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:16:43,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-07-14 06:16:43,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 295. [2022-07-14 06:16:43,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 219 states have (on average 1.7716894977168949) internal successors, (388), 284 states have internal predecessors, (388), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-14 06:16:43,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 404 transitions. [2022-07-14 06:16:43,888 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 404 transitions. Word has length 15 [2022-07-14 06:16:43,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:43,889 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 404 transitions. [2022-07-14 06:16:43,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:43,889 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 404 transitions. [2022-07-14 06:16:43,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-14 06:16:43,889 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:43,889 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:43,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-14 06:16:43,890 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:43,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:43,890 INFO L85 PathProgramCache]: Analyzing trace with hash -41167144, now seen corresponding path program 1 times [2022-07-14 06:16:43,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:43,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017139825] [2022-07-14 06:16:43,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:43,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:43,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:43,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-14 06:16:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:43,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:43,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:43,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017139825] [2022-07-14 06:16:43,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017139825] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:43,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:43,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:16:43,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822415249] [2022-07-14 06:16:43,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:43,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:16:43,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:43,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:16:43,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:16:43,952 INFO L87 Difference]: Start difference. First operand 295 states and 404 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:44,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:44,101 INFO L93 Difference]: Finished difference Result 393 states and 512 transitions. [2022-07-14 06:16:44,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:16:44,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-07-14 06:16:44,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:44,103 INFO L225 Difference]: With dead ends: 393 [2022-07-14 06:16:44,103 INFO L226 Difference]: Without dead ends: 393 [2022-07-14 06:16:44,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:16:44,104 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 343 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:44,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 270 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:16:44,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-07-14 06:16:44,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 292. [2022-07-14 06:16:44,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 219 states have (on average 1.7168949771689497) internal successors, (376), 281 states have internal predecessors, (376), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-14 06:16:44,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 392 transitions. [2022-07-14 06:16:44,113 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 392 transitions. Word has length 15 [2022-07-14 06:16:44,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:44,113 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 392 transitions. [2022-07-14 06:16:44,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:44,114 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 392 transitions. [2022-07-14 06:16:44,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-14 06:16:44,114 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:44,114 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:44,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-14 06:16:44,115 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:44,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:44,116 INFO L85 PathProgramCache]: Analyzing trace with hash 85672930, now seen corresponding path program 1 times [2022-07-14 06:16:44,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:44,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544407002] [2022-07-14 06:16:44,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:44,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:44,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:16:44,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:44,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:44,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:44,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544407002] [2022-07-14 06:16:44,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544407002] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:44,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:44,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:16:44,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474305630] [2022-07-14 06:16:44,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:44,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:16:44,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:44,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:16:44,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:16:44,184 INFO L87 Difference]: Start difference. First operand 292 states and 392 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:44,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:44,501 INFO L93 Difference]: Finished difference Result 628 states and 735 transitions. [2022-07-14 06:16:44,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:16:44,502 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-07-14 06:16:44,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:44,505 INFO L225 Difference]: With dead ends: 628 [2022-07-14 06:16:44,505 INFO L226 Difference]: Without dead ends: 628 [2022-07-14 06:16:44,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:16:44,505 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 763 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:44,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [765 Valid, 538 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:16:44,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-07-14 06:16:44,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 289. [2022-07-14 06:16:44,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 220 states have (on average 1.6818181818181819) internal successors, (370), 278 states have internal predecessors, (370), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-14 06:16:44,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 386 transitions. [2022-07-14 06:16:44,515 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 386 transitions. Word has length 17 [2022-07-14 06:16:44,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:44,516 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 386 transitions. [2022-07-14 06:16:44,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:44,516 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 386 transitions. [2022-07-14 06:16:44,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-14 06:16:44,517 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:44,517 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:44,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-14 06:16:44,517 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:44,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:44,518 INFO L85 PathProgramCache]: Analyzing trace with hash 85672931, now seen corresponding path program 1 times [2022-07-14 06:16:44,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:44,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866812073] [2022-07-14 06:16:44,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:44,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:44,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:44,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:16:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:44,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:44,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866812073] [2022-07-14 06:16:44,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866812073] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:44,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:44,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:16:44,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202168388] [2022-07-14 06:16:44,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:44,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:16:44,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:44,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:16:44,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:16:44,612 INFO L87 Difference]: Start difference. First operand 289 states and 386 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:44,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:44,937 INFO L93 Difference]: Finished difference Result 594 states and 794 transitions. [2022-07-14 06:16:44,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:16:44,938 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-07-14 06:16:44,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:44,940 INFO L225 Difference]: With dead ends: 594 [2022-07-14 06:16:44,940 INFO L226 Difference]: Without dead ends: 594 [2022-07-14 06:16:44,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:16:44,941 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 538 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:44,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 696 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:16:44,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-07-14 06:16:44,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 351. [2022-07-14 06:16:44,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 278 states have (on average 1.6654676258992807) internal successors, (463), 338 states have internal predecessors, (463), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-14 06:16:44,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 487 transitions. [2022-07-14 06:16:44,956 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 487 transitions. Word has length 17 [2022-07-14 06:16:44,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:44,956 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 487 transitions. [2022-07-14 06:16:44,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:44,956 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 487 transitions. [2022-07-14 06:16:44,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-14 06:16:44,960 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:44,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:44,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-14 06:16:44,961 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:44,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:44,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1721781532, now seen corresponding path program 1 times [2022-07-14 06:16:44,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:44,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494857985] [2022-07-14 06:16:44,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:44,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:45,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:16:45,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:45,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:45,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494857985] [2022-07-14 06:16:45,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494857985] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:45,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:45,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:16:45,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494063073] [2022-07-14 06:16:45,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:45,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:16:45,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:45,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:16:45,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:16:45,057 INFO L87 Difference]: Start difference. First operand 351 states and 487 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:45,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:45,101 INFO L93 Difference]: Finished difference Result 559 states and 756 transitions. [2022-07-14 06:16:45,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:16:45,101 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-07-14 06:16:45,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:45,105 INFO L225 Difference]: With dead ends: 559 [2022-07-14 06:16:45,105 INFO L226 Difference]: Without dead ends: 559 [2022-07-14 06:16:45,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:16:45,106 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 231 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1489 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:45,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 1489 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:16:45,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-07-14 06:16:45,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 351. [2022-07-14 06:16:45,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 278 states have (on average 1.658273381294964) internal successors, (461), 338 states have internal predecessors, (461), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-14 06:16:45,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 485 transitions. [2022-07-14 06:16:45,122 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 485 transitions. Word has length 17 [2022-07-14 06:16:45,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:45,124 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 485 transitions. [2022-07-14 06:16:45,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:45,125 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 485 transitions. [2022-07-14 06:16:45,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-14 06:16:45,125 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:45,125 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:45,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-14 06:16:45,126 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:45,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:45,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1835564363, now seen corresponding path program 1 times [2022-07-14 06:16:45,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:45,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410188765] [2022-07-14 06:16:45,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:45,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:45,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:16:45,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:45,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:45,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:45,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410188765] [2022-07-14 06:16:45,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410188765] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:45,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:45,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:16:45,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918538448] [2022-07-14 06:16:45,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:45,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:16:45,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:45,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:16:45,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:16:45,234 INFO L87 Difference]: Start difference. First operand 351 states and 485 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:45,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:45,593 INFO L93 Difference]: Finished difference Result 635 states and 863 transitions. [2022-07-14 06:16:45,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:16:45,594 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-07-14 06:16:45,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:45,597 INFO L225 Difference]: With dead ends: 635 [2022-07-14 06:16:45,597 INFO L226 Difference]: Without dead ends: 635 [2022-07-14 06:16:45,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:16:45,597 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 450 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:45,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 834 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:16:45,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2022-07-14 06:16:45,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 346. [2022-07-14 06:16:45,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 273 states have (on average 1.6593406593406594) internal successors, (453), 333 states have internal predecessors, (453), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-14 06:16:45,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 477 transitions. [2022-07-14 06:16:45,609 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 477 transitions. Word has length 18 [2022-07-14 06:16:45,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:45,609 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 477 transitions. [2022-07-14 06:16:45,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:45,610 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 477 transitions. [2022-07-14 06:16:45,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-14 06:16:45,610 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:45,610 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:45,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-14 06:16:45,611 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:45,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:45,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1066754491, now seen corresponding path program 1 times [2022-07-14 06:16:45,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:45,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196448127] [2022-07-14 06:16:45,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:45,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:45,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-14 06:16:45,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:45,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:45,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:45,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196448127] [2022-07-14 06:16:45,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196448127] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:45,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:45,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-14 06:16:45,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293587420] [2022-07-14 06:16:45,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:45,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 06:16:45,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:45,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 06:16:45,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:16:45,842 INFO L87 Difference]: Start difference. First operand 346 states and 477 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:46,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:46,437 INFO L93 Difference]: Finished difference Result 753 states and 1012 transitions. [2022-07-14 06:16:46,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:16:46,438 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-07-14 06:16:46,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:46,441 INFO L225 Difference]: With dead ends: 753 [2022-07-14 06:16:46,441 INFO L226 Difference]: Without dead ends: 751 [2022-07-14 06:16:46,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-07-14 06:16:46,442 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 563 mSDsluCounter, 1378 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:46,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 1626 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:16:46,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-07-14 06:16:46,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 340. [2022-07-14 06:16:46,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 267 states have (on average 1.655430711610487) internal successors, (442), 327 states have internal predecessors, (442), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-14 06:16:46,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 466 transitions. [2022-07-14 06:16:46,453 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 466 transitions. Word has length 21 [2022-07-14 06:16:46,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:46,454 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 466 transitions. [2022-07-14 06:16:46,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:46,454 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 466 transitions. [2022-07-14 06:16:46,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-14 06:16:46,454 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:46,455 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:46,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-14 06:16:46,455 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:46,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:46,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1136706200, now seen corresponding path program 1 times [2022-07-14 06:16:46,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:46,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435976411] [2022-07-14 06:16:46,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:46,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:46,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:16:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:46,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:46,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435976411] [2022-07-14 06:16:46,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435976411] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:46,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:46,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-14 06:16:46,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953678817] [2022-07-14 06:16:46,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:46,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:16:46,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:46,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:16:46,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:16:46,636 INFO L87 Difference]: Start difference. First operand 340 states and 466 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:46,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:46,951 INFO L93 Difference]: Finished difference Result 496 states and 644 transitions. [2022-07-14 06:16:46,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:16:46,951 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-07-14 06:16:46,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:46,953 INFO L225 Difference]: With dead ends: 496 [2022-07-14 06:16:46,953 INFO L226 Difference]: Without dead ends: 496 [2022-07-14 06:16:46,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-07-14 06:16:46,954 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 193 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:46,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 1052 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:16:46,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-07-14 06:16:46,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 356. [2022-07-14 06:16:46,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 283 states have (on average 1.6289752650176679) internal successors, (461), 341 states have internal predecessors, (461), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-14 06:16:46,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 485 transitions. [2022-07-14 06:16:46,967 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 485 transitions. Word has length 21 [2022-07-14 06:16:46,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:46,967 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 485 transitions. [2022-07-14 06:16:46,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:46,968 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 485 transitions. [2022-07-14 06:16:46,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 06:16:46,968 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:46,968 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:46,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-14 06:16:46,969 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:46,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:46,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1088554597, now seen corresponding path program 1 times [2022-07-14 06:16:46,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:46,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333847243] [2022-07-14 06:16:46,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:46,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:46,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:47,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:16:47,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:47,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:47,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:47,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333847243] [2022-07-14 06:16:47,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333847243] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:47,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:47,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:16:47,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565233104] [2022-07-14 06:16:47,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:47,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:16:47,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:47,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:16:47,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:16:47,034 INFO L87 Difference]: Start difference. First operand 356 states and 485 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:47,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:47,072 INFO L93 Difference]: Finished difference Result 610 states and 833 transitions. [2022-07-14 06:16:47,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:16:47,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-07-14 06:16:47,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:47,075 INFO L225 Difference]: With dead ends: 610 [2022-07-14 06:16:47,075 INFO L226 Difference]: Without dead ends: 610 [2022-07-14 06:16:47,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:16:47,076 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 233 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:47,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 1195 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:16:47,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-07-14 06:16:47,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 358. [2022-07-14 06:16:47,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 285 states have (on average 1.6245614035087719) internal successors, (463), 343 states have internal predecessors, (463), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-14 06:16:47,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 487 transitions. [2022-07-14 06:16:47,086 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 487 transitions. Word has length 22 [2022-07-14 06:16:47,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:47,086 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 487 transitions. [2022-07-14 06:16:47,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:47,086 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 487 transitions. [2022-07-14 06:16:47,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 06:16:47,087 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:47,087 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:47,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-14 06:16:47,087 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:47,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:47,088 INFO L85 PathProgramCache]: Analyzing trace with hash 686452765, now seen corresponding path program 1 times [2022-07-14 06:16:47,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:47,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105685716] [2022-07-14 06:16:47,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:47,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:47,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:47,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:16:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:47,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:47,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:47,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105685716] [2022-07-14 06:16:47,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105685716] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:47,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:47,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:16:47,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225885475] [2022-07-14 06:16:47,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:47,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:16:47,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:47,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:16:47,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:16:47,172 INFO L87 Difference]: Start difference. First operand 358 states and 487 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:47,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:47,213 INFO L93 Difference]: Finished difference Result 606 states and 825 transitions. [2022-07-14 06:16:47,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:16:47,213 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-07-14 06:16:47,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:47,216 INFO L225 Difference]: With dead ends: 606 [2022-07-14 06:16:47,216 INFO L226 Difference]: Without dead ends: 606 [2022-07-14 06:16:47,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:16:47,217 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 230 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:47,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 1211 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:16:47,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-07-14 06:16:47,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 356. [2022-07-14 06:16:47,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 283 states have (on average 1.6148409893992932) internal successors, (457), 341 states have internal predecessors, (457), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-14 06:16:47,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 481 transitions. [2022-07-14 06:16:47,227 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 481 transitions. Word has length 22 [2022-07-14 06:16:47,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:47,227 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 481 transitions. [2022-07-14 06:16:47,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:47,227 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 481 transitions. [2022-07-14 06:16:47,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 06:16:47,228 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:47,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:47,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-14 06:16:47,228 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:47,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:47,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1594113222, now seen corresponding path program 1 times [2022-07-14 06:16:47,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:47,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383109766] [2022-07-14 06:16:47,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:47,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:47,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:16:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:47,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:47,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:47,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383109766] [2022-07-14 06:16:47,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383109766] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:47,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:47,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-14 06:16:47,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803119759] [2022-07-14 06:16:47,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:47,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:16:47,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:47,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:16:47,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:16:47,319 INFO L87 Difference]: Start difference. First operand 356 states and 481 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:47,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:47,610 INFO L93 Difference]: Finished difference Result 540 states and 714 transitions. [2022-07-14 06:16:47,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:16:47,611 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-07-14 06:16:47,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:47,613 INFO L225 Difference]: With dead ends: 540 [2022-07-14 06:16:47,613 INFO L226 Difference]: Without dead ends: 540 [2022-07-14 06:16:47,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-07-14 06:16:47,614 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 188 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:47,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 1215 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:16:47,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-07-14 06:16:47,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 366. [2022-07-14 06:16:47,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 293 states have (on average 1.6006825938566553) internal successors, (469), 349 states have internal predecessors, (469), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-14 06:16:47,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 493 transitions. [2022-07-14 06:16:47,625 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 493 transitions. Word has length 22 [2022-07-14 06:16:47,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:47,625 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 493 transitions. [2022-07-14 06:16:47,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:47,626 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 493 transitions. [2022-07-14 06:16:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-14 06:16:47,626 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:47,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:47,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-14 06:16:47,627 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:47,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:47,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1338476602, now seen corresponding path program 1 times [2022-07-14 06:16:47,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:47,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043574645] [2022-07-14 06:16:47,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:47,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:47,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-14 06:16:47,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:47,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:47,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043574645] [2022-07-14 06:16:47,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043574645] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:47,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:47,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:16:47,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927277584] [2022-07-14 06:16:47,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:47,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:16:47,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:47,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:16:47,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:16:47,663 INFO L87 Difference]: Start difference. First operand 366 states and 493 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:47,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:47,862 INFO L93 Difference]: Finished difference Result 583 states and 733 transitions. [2022-07-14 06:16:47,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:16:47,862 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-07-14 06:16:47,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:47,864 INFO L225 Difference]: With dead ends: 583 [2022-07-14 06:16:47,864 INFO L226 Difference]: Without dead ends: 583 [2022-07-14 06:16:47,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:16:47,865 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 287 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:47,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 425 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:16:47,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-07-14 06:16:47,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 384. [2022-07-14 06:16:47,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 311 states have (on average 1.617363344051447) internal successors, (503), 367 states have internal predecessors, (503), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-14 06:16:47,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 527 transitions. [2022-07-14 06:16:47,876 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 527 transitions. Word has length 23 [2022-07-14 06:16:47,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:47,876 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 527 transitions. [2022-07-14 06:16:47,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:47,876 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 527 transitions. [2022-07-14 06:16:47,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-14 06:16:47,877 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:47,877 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:47,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-14 06:16:47,877 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:47,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:47,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1338476601, now seen corresponding path program 1 times [2022-07-14 06:16:47,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:47,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952880390] [2022-07-14 06:16:47,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:47,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:47,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-14 06:16:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:47,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:47,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:47,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952880390] [2022-07-14 06:16:47,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952880390] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:47,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:47,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:16:47,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211826956] [2022-07-14 06:16:47,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:47,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:16:47,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:47,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:16:47,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:16:47,974 INFO L87 Difference]: Start difference. First operand 384 states and 527 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:48,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:48,173 INFO L93 Difference]: Finished difference Result 516 states and 688 transitions. [2022-07-14 06:16:48,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:16:48,174 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-07-14 06:16:48,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:48,176 INFO L225 Difference]: With dead ends: 516 [2022-07-14 06:16:48,176 INFO L226 Difference]: Without dead ends: 516 [2022-07-14 06:16:48,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:16:48,176 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 642 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:48,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [642 Valid, 324 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:16:48,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-07-14 06:16:48,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 381. [2022-07-14 06:16:48,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 311 states have (on average 1.5787781350482315) internal successors, (491), 364 states have internal predecessors, (491), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-14 06:16:48,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 515 transitions. [2022-07-14 06:16:48,184 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 515 transitions. Word has length 23 [2022-07-14 06:16:48,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:48,184 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 515 transitions. [2022-07-14 06:16:48,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:48,184 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 515 transitions. [2022-07-14 06:16:48,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 06:16:48,184 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:48,185 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:48,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-14 06:16:48,185 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:48,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:48,185 INFO L85 PathProgramCache]: Analyzing trace with hash -740334691, now seen corresponding path program 1 times [2022-07-14 06:16:48,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:48,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522666366] [2022-07-14 06:16:48,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:48,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:48,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:16:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:48,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:48,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:48,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522666366] [2022-07-14 06:16:48,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522666366] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:48,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:48,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:16:48,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897584538] [2022-07-14 06:16:48,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:48,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:16:48,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:48,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:16:48,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:16:48,211 INFO L87 Difference]: Start difference. First operand 381 states and 515 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:48,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:48,228 INFO L93 Difference]: Finished difference Result 397 states and 531 transitions. [2022-07-14 06:16:48,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:16:48,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-07-14 06:16:48,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:48,230 INFO L225 Difference]: With dead ends: 397 [2022-07-14 06:16:48,230 INFO L226 Difference]: Without dead ends: 397 [2022-07-14 06:16:48,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:16:48,231 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 3 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:48,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 508 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:16:48,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-07-14 06:16:48,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 393. [2022-07-14 06:16:48,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 323 states have (on average 1.5572755417956656) internal successors, (503), 376 states have internal predecessors, (503), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-14 06:16:48,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 527 transitions. [2022-07-14 06:16:48,239 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 527 transitions. Word has length 25 [2022-07-14 06:16:48,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:48,240 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 527 transitions. [2022-07-14 06:16:48,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:48,240 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 527 transitions. [2022-07-14 06:16:48,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 06:16:48,240 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:48,241 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:48,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-14 06:16:48,241 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:48,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:48,241 INFO L85 PathProgramCache]: Analyzing trace with hash -738487649, now seen corresponding path program 1 times [2022-07-14 06:16:48,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:48,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391329548] [2022-07-14 06:16:48,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:48,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:48,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:48,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:16:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:48,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:48,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:48,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391329548] [2022-07-14 06:16:48,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391329548] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:48,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:48,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:16:48,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548270473] [2022-07-14 06:16:48,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:48,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:16:48,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:48,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:16:48,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:16:48,283 INFO L87 Difference]: Start difference. First operand 393 states and 527 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:48,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:48,414 INFO L93 Difference]: Finished difference Result 770 states and 1027 transitions. [2022-07-14 06:16:48,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:16:48,416 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-07-14 06:16:48,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:48,419 INFO L225 Difference]: With dead ends: 770 [2022-07-14 06:16:48,419 INFO L226 Difference]: Without dead ends: 770 [2022-07-14 06:16:48,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:16:48,419 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 464 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:48,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 404 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:16:48,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-07-14 06:16:48,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 469. [2022-07-14 06:16:48,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 399 states have (on average 1.5413533834586466) internal successors, (615), 452 states have internal predecessors, (615), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-14 06:16:48,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 639 transitions. [2022-07-14 06:16:48,445 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 639 transitions. Word has length 25 [2022-07-14 06:16:48,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:48,445 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 639 transitions. [2022-07-14 06:16:48,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:48,446 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 639 transitions. [2022-07-14 06:16:48,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 06:16:48,447 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:48,447 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:48,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-14 06:16:48,448 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:48,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:48,449 INFO L85 PathProgramCache]: Analyzing trace with hash -738487650, now seen corresponding path program 1 times [2022-07-14 06:16:48,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:48,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655758450] [2022-07-14 06:16:48,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:48,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:48,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:48,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:16:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:48,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:48,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:48,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655758450] [2022-07-14 06:16:48,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655758450] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:48,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:48,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:16:48,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197703920] [2022-07-14 06:16:48,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:48,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:16:48,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:48,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:16:48,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:16:48,471 INFO L87 Difference]: Start difference. First operand 469 states and 639 transitions. Second operand has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:48,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:48,558 INFO L93 Difference]: Finished difference Result 560 states and 741 transitions. [2022-07-14 06:16:48,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:16:48,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-07-14 06:16:48,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:48,561 INFO L225 Difference]: With dead ends: 560 [2022-07-14 06:16:48,561 INFO L226 Difference]: Without dead ends: 560 [2022-07-14 06:16:48,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:16:48,563 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 139 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:48,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 257 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:16:48,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-07-14 06:16:48,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 467. [2022-07-14 06:16:48,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 399 states have (on average 1.5112781954887218) internal successors, (603), 450 states have internal predecessors, (603), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-14 06:16:48,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 627 transitions. [2022-07-14 06:16:48,576 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 627 transitions. Word has length 25 [2022-07-14 06:16:48,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:48,577 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 627 transitions. [2022-07-14 06:16:48,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:48,577 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 627 transitions. [2022-07-14 06:16:48,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-14 06:16:48,578 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:48,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:48,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-14 06:16:48,579 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:48,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:48,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1484578673, now seen corresponding path program 1 times [2022-07-14 06:16:48,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:48,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567017696] [2022-07-14 06:16:48,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:48,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:48,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:16:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:48,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:48,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:48,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567017696] [2022-07-14 06:16:48,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567017696] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:48,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:48,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:16:48,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519901062] [2022-07-14 06:16:48,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:48,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:16:48,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:48,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:16:48,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:16:48,644 INFO L87 Difference]: Start difference. First operand 467 states and 627 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:48,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:48,807 INFO L93 Difference]: Finished difference Result 842 states and 1119 transitions. [2022-07-14 06:16:48,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:16:48,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-07-14 06:16:48,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:48,810 INFO L225 Difference]: With dead ends: 842 [2022-07-14 06:16:48,810 INFO L226 Difference]: Without dead ends: 842 [2022-07-14 06:16:48,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:16:48,811 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 305 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:48,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 581 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:16:48,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-07-14 06:16:48,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 467. [2022-07-14 06:16:48,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 399 states have (on average 1.5112781954887218) internal successors, (603), 450 states have internal predecessors, (603), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-14 06:16:48,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 627 transitions. [2022-07-14 06:16:48,822 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 627 transitions. Word has length 26 [2022-07-14 06:16:48,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:48,823 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 627 transitions. [2022-07-14 06:16:48,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:48,823 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 627 transitions. [2022-07-14 06:16:48,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-14 06:16:48,824 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:48,824 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:48,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-14 06:16:48,824 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:48,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:48,825 INFO L85 PathProgramCache]: Analyzing trace with hash -2109324045, now seen corresponding path program 1 times [2022-07-14 06:16:48,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:48,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88247701] [2022-07-14 06:16:48,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:48,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:48,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:16:48,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:48,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:48,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:48,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88247701] [2022-07-14 06:16:48,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88247701] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:48,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:48,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:16:48,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500045804] [2022-07-14 06:16:48,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:48,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:16:48,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:48,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:16:48,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:16:48,877 INFO L87 Difference]: Start difference. First operand 467 states and 627 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:48,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:48,917 INFO L93 Difference]: Finished difference Result 666 states and 882 transitions. [2022-07-14 06:16:48,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:16:48,918 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-07-14 06:16:48,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:48,920 INFO L225 Difference]: With dead ends: 666 [2022-07-14 06:16:48,920 INFO L226 Difference]: Without dead ends: 666 [2022-07-14 06:16:48,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:16:48,921 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 222 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1432 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:48,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 1432 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:16:48,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-07-14 06:16:48,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 390. [2022-07-14 06:16:48,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 323 states have (on average 1.5077399380804954) internal successors, (487), 373 states have internal predecessors, (487), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-14 06:16:48,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 511 transitions. [2022-07-14 06:16:48,931 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 511 transitions. Word has length 26 [2022-07-14 06:16:48,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:48,931 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 511 transitions. [2022-07-14 06:16:48,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:48,932 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 511 transitions. [2022-07-14 06:16:48,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-14 06:16:48,932 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:48,932 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:48,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-14 06:16:48,933 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:48,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:48,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1817784781, now seen corresponding path program 1 times [2022-07-14 06:16:48,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:48,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085804024] [2022-07-14 06:16:48,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:48,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:48,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-14 06:16:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:48,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:48,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:48,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085804024] [2022-07-14 06:16:48,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085804024] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:48,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:48,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:16:48,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317322908] [2022-07-14 06:16:48,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:48,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:16:48,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:48,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:16:48,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:16:48,988 INFO L87 Difference]: Start difference. First operand 390 states and 511 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:49,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:49,127 INFO L93 Difference]: Finished difference Result 472 states and 596 transitions. [2022-07-14 06:16:49,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:16:49,127 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-07-14 06:16:49,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:49,129 INFO L225 Difference]: With dead ends: 472 [2022-07-14 06:16:49,129 INFO L226 Difference]: Without dead ends: 472 [2022-07-14 06:16:49,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:16:49,130 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 163 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:49,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 626 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:16:49,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-07-14 06:16:49,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 390. [2022-07-14 06:16:49,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 323 states have (on average 1.5046439628482973) internal successors, (486), 373 states have internal predecessors, (486), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-14 06:16:49,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 510 transitions. [2022-07-14 06:16:49,140 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 510 transitions. Word has length 27 [2022-07-14 06:16:49,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:49,140 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 510 transitions. [2022-07-14 06:16:49,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:49,140 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 510 transitions. [2022-07-14 06:16:49,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-14 06:16:49,141 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:49,141 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:49,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-14 06:16:49,144 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:49,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:49,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1017025601, now seen corresponding path program 1 times [2022-07-14 06:16:49,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:49,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563624611] [2022-07-14 06:16:49,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:49,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:49,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:49,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:16:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:49,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:49,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563624611] [2022-07-14 06:16:49,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563624611] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:49,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:49,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-14 06:16:49,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822910082] [2022-07-14 06:16:49,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:49,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:16:49,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:49,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:16:49,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:16:49,206 INFO L87 Difference]: Start difference. First operand 390 states and 510 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:49,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:49,366 INFO L93 Difference]: Finished difference Result 589 states and 763 transitions. [2022-07-14 06:16:49,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:16:49,367 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-07-14 06:16:49,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:49,368 INFO L225 Difference]: With dead ends: 589 [2022-07-14 06:16:49,369 INFO L226 Difference]: Without dead ends: 589 [2022-07-14 06:16:49,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:16:49,369 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 149 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:49,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 1213 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:16:49,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-07-14 06:16:49,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 422. [2022-07-14 06:16:49,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 355 states have (on average 1.476056338028169) internal successors, (524), 405 states have internal predecessors, (524), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-14 06:16:49,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 548 transitions. [2022-07-14 06:16:49,378 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 548 transitions. Word has length 27 [2022-07-14 06:16:49,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:49,378 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 548 transitions. [2022-07-14 06:16:49,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:49,379 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 548 transitions. [2022-07-14 06:16:49,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-14 06:16:49,379 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:49,379 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:49,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-14 06:16:49,379 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:49,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:49,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1017025407, now seen corresponding path program 1 times [2022-07-14 06:16:49,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:49,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289352252] [2022-07-14 06:16:49,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:49,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:49,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:49,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:16:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:49,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:49,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:49,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289352252] [2022-07-14 06:16:49,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289352252] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:49,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:49,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:16:49,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90467452] [2022-07-14 06:16:49,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:49,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:16:49,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:49,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:16:49,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:16:49,433 INFO L87 Difference]: Start difference. First operand 422 states and 548 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:49,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:49,564 INFO L93 Difference]: Finished difference Result 828 states and 1070 transitions. [2022-07-14 06:16:49,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:16:49,565 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-07-14 06:16:49,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:49,567 INFO L225 Difference]: With dead ends: 828 [2022-07-14 06:16:49,567 INFO L226 Difference]: Without dead ends: 828 [2022-07-14 06:16:49,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:16:49,568 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 440 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:49,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 659 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:16:49,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-07-14 06:16:49,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 538. [2022-07-14 06:16:49,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 471 states have (on average 1.4564755838641188) internal successors, (686), 521 states have internal predecessors, (686), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-14 06:16:49,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 710 transitions. [2022-07-14 06:16:49,579 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 710 transitions. Word has length 27 [2022-07-14 06:16:49,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:49,580 INFO L495 AbstractCegarLoop]: Abstraction has 538 states and 710 transitions. [2022-07-14 06:16:49,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:49,580 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 710 transitions. [2022-07-14 06:16:49,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-14 06:16:49,581 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:49,581 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:49,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-14 06:16:49,581 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:49,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:49,581 INFO L85 PathProgramCache]: Analyzing trace with hash 516753601, now seen corresponding path program 1 times [2022-07-14 06:16:49,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:49,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885729027] [2022-07-14 06:16:49,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:49,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:49,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-14 06:16:49,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:49,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:49,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885729027] [2022-07-14 06:16:49,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885729027] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:49,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:49,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:16:49,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352296984] [2022-07-14 06:16:49,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:49,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:16:49,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:49,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:16:49,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:16:49,648 INFO L87 Difference]: Start difference. First operand 538 states and 710 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:49,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:49,821 INFO L93 Difference]: Finished difference Result 783 states and 1007 transitions. [2022-07-14 06:16:49,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:16:49,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-07-14 06:16:49,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:49,824 INFO L225 Difference]: With dead ends: 783 [2022-07-14 06:16:49,824 INFO L226 Difference]: Without dead ends: 783 [2022-07-14 06:16:49,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:16:49,825 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 218 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:49,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 635 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:16:49,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2022-07-14 06:16:49,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 576. [2022-07-14 06:16:49,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 505 states have (on average 1.4574257425742574) internal successors, (736), 557 states have internal predecessors, (736), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2022-07-14 06:16:49,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 766 transitions. [2022-07-14 06:16:49,842 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 766 transitions. Word has length 28 [2022-07-14 06:16:49,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:49,842 INFO L495 AbstractCegarLoop]: Abstraction has 576 states and 766 transitions. [2022-07-14 06:16:49,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:49,842 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 766 transitions. [2022-07-14 06:16:49,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-14 06:16:49,843 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:49,843 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:49,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-14 06:16:49,843 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:49,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:49,844 INFO L85 PathProgramCache]: Analyzing trace with hash 750963923, now seen corresponding path program 1 times [2022-07-14 06:16:49,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:49,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690507992] [2022-07-14 06:16:49,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:49,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:49,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:49,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:16:49,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:49,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:49,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690507992] [2022-07-14 06:16:49,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690507992] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:49,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:49,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:16:49,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061775656] [2022-07-14 06:16:49,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:49,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:16:49,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:49,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:16:49,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:16:49,896 INFO L87 Difference]: Start difference. First operand 576 states and 766 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:50,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:50,051 INFO L93 Difference]: Finished difference Result 865 states and 1118 transitions. [2022-07-14 06:16:50,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:16:50,051 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-07-14 06:16:50,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:50,054 INFO L225 Difference]: With dead ends: 865 [2022-07-14 06:16:50,054 INFO L226 Difference]: Without dead ends: 865 [2022-07-14 06:16:50,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:16:50,055 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 299 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:50,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 529 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:16:50,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-07-14 06:16:50,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 459. [2022-07-14 06:16:50,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 389 states have (on average 1.455012853470437) internal successors, (566), 440 states have internal predecessors, (566), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2022-07-14 06:16:50,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 596 transitions. [2022-07-14 06:16:50,066 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 596 transitions. Word has length 28 [2022-07-14 06:16:50,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:50,067 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 596 transitions. [2022-07-14 06:16:50,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:50,067 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 596 transitions. [2022-07-14 06:16:50,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-14 06:16:50,067 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:50,067 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:50,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-14 06:16:50,068 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:50,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:50,068 INFO L85 PathProgramCache]: Analyzing trace with hash -933658936, now seen corresponding path program 1 times [2022-07-14 06:16:50,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:50,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969632969] [2022-07-14 06:16:50,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:50,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:50,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:50,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-14 06:16:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:50,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:50,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:50,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969632969] [2022-07-14 06:16:50,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969632969] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:50,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:50,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:16:50,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747627133] [2022-07-14 06:16:50,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:50,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:16:50,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:50,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:16:50,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:16:50,122 INFO L87 Difference]: Start difference. First operand 459 states and 596 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:50,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:50,164 INFO L93 Difference]: Finished difference Result 929 states and 1212 transitions. [2022-07-14 06:16:50,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:16:50,165 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-07-14 06:16:50,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:50,168 INFO L225 Difference]: With dead ends: 929 [2022-07-14 06:16:50,168 INFO L226 Difference]: Without dead ends: 929 [2022-07-14 06:16:50,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:16:50,169 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 232 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:50,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 934 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:16:50,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2022-07-14 06:16:50,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 534. [2022-07-14 06:16:50,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 464 states have (on average 1.4504310344827587) internal successors, (673), 510 states have internal predecessors, (673), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 18 states have call predecessors, (20), 10 states have call successors, (20) [2022-07-14 06:16:50,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 703 transitions. [2022-07-14 06:16:50,184 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 703 transitions. Word has length 30 [2022-07-14 06:16:50,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:50,185 INFO L495 AbstractCegarLoop]: Abstraction has 534 states and 703 transitions. [2022-07-14 06:16:50,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:50,185 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 703 transitions. [2022-07-14 06:16:50,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-14 06:16:50,185 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:50,186 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:50,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-14 06:16:50,187 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:50,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:50,188 INFO L85 PathProgramCache]: Analyzing trace with hash -933657014, now seen corresponding path program 1 times [2022-07-14 06:16:50,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:50,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048298231] [2022-07-14 06:16:50,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:50,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:50,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:50,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-14 06:16:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:50,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:50,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048298231] [2022-07-14 06:16:50,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048298231] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:50,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:50,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:16:50,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089857458] [2022-07-14 06:16:50,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:50,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:16:50,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:50,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:16:50,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:16:50,272 INFO L87 Difference]: Start difference. First operand 534 states and 703 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:50,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:50,548 INFO L93 Difference]: Finished difference Result 1132 states and 1464 transitions. [2022-07-14 06:16:50,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:16:50,548 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-07-14 06:16:50,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:50,552 INFO L225 Difference]: With dead ends: 1132 [2022-07-14 06:16:50,552 INFO L226 Difference]: Without dead ends: 1132 [2022-07-14 06:16:50,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:16:50,552 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 501 mSDsluCounter, 1307 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 1630 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:50,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 1630 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:16:50,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2022-07-14 06:16:50,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 552. [2022-07-14 06:16:50,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 482 states have (on average 1.450207468879668) internal successors, (699), 528 states have internal predecessors, (699), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 18 states have call predecessors, (20), 10 states have call successors, (20) [2022-07-14 06:16:50,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 729 transitions. [2022-07-14 06:16:50,571 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 729 transitions. Word has length 30 [2022-07-14 06:16:50,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:50,571 INFO L495 AbstractCegarLoop]: Abstraction has 552 states and 729 transitions. [2022-07-14 06:16:50,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:50,571 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 729 transitions. [2022-07-14 06:16:50,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-14 06:16:50,572 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:50,572 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:50,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-14 06:16:50,572 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:50,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:50,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1615988093, now seen corresponding path program 1 times [2022-07-14 06:16:50,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:50,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743852812] [2022-07-14 06:16:50,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:50,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:50,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-14 06:16:50,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:50,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:50,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743852812] [2022-07-14 06:16:50,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743852812] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:50,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:50,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:16:50,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893794850] [2022-07-14 06:16:50,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:50,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:16:50,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:50,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:16:50,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:16:50,689 INFO L87 Difference]: Start difference. First operand 552 states and 729 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:51,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:51,162 INFO L93 Difference]: Finished difference Result 1036 states and 1327 transitions. [2022-07-14 06:16:51,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:16:51,162 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-07-14 06:16:51,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:51,166 INFO L225 Difference]: With dead ends: 1036 [2022-07-14 06:16:51,166 INFO L226 Difference]: Without dead ends: 1036 [2022-07-14 06:16:51,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:16:51,167 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 461 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:51,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 994 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:16:51,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2022-07-14 06:16:51,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 592. [2022-07-14 06:16:51,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 518 states have (on average 1.4343629343629343) internal successors, (743), 565 states have internal predecessors, (743), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 20 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-14 06:16:51,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 779 transitions. [2022-07-14 06:16:51,180 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 779 transitions. Word has length 30 [2022-07-14 06:16:51,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:51,180 INFO L495 AbstractCegarLoop]: Abstraction has 592 states and 779 transitions. [2022-07-14 06:16:51,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:51,181 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 779 transitions. [2022-07-14 06:16:51,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-14 06:16:51,181 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:51,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:51,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-14 06:16:51,181 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:51,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:51,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1342481239, now seen corresponding path program 1 times [2022-07-14 06:16:51,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:51,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401759989] [2022-07-14 06:16:51,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:51,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:51,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:51,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-14 06:16:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:51,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:51,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401759989] [2022-07-14 06:16:51,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401759989] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:51,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:51,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:16:51,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950002394] [2022-07-14 06:16:51,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:51,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:16:51,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:51,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:16:51,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:16:51,229 INFO L87 Difference]: Start difference. First operand 592 states and 779 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:51,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:51,263 INFO L93 Difference]: Finished difference Result 952 states and 1240 transitions. [2022-07-14 06:16:51,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:16:51,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-07-14 06:16:51,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:51,268 INFO L225 Difference]: With dead ends: 952 [2022-07-14 06:16:51,268 INFO L226 Difference]: Without dead ends: 952 [2022-07-14 06:16:51,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:16:51,269 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 211 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:51,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1077 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:16:51,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-07-14 06:16:51,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 588. [2022-07-14 06:16:51,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 514 states have (on average 1.433852140077821) internal successors, (737), 561 states have internal predecessors, (737), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 20 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-14 06:16:51,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 773 transitions. [2022-07-14 06:16:51,281 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 773 transitions. Word has length 30 [2022-07-14 06:16:51,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:51,281 INFO L495 AbstractCegarLoop]: Abstraction has 588 states and 773 transitions. [2022-07-14 06:16:51,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:51,281 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 773 transitions. [2022-07-14 06:16:51,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-14 06:16:51,282 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:51,282 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:51,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-14 06:16:51,282 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:51,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:51,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1340636119, now seen corresponding path program 1 times [2022-07-14 06:16:51,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:51,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815915984] [2022-07-14 06:16:51,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:51,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:51,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:51,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-14 06:16:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:51,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:51,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:51,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815915984] [2022-07-14 06:16:51,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815915984] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:51,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:51,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:16:51,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690408260] [2022-07-14 06:16:51,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:51,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:16:51,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:51,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:16:51,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:16:51,356 INFO L87 Difference]: Start difference. First operand 588 states and 773 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:51,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:51,612 INFO L93 Difference]: Finished difference Result 1169 states and 1513 transitions. [2022-07-14 06:16:51,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:16:51,612 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-07-14 06:16:51,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:51,615 INFO L225 Difference]: With dead ends: 1169 [2022-07-14 06:16:51,615 INFO L226 Difference]: Without dead ends: 1169 [2022-07-14 06:16:51,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:16:51,616 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 477 mSDsluCounter, 1366 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 1742 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:51,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 1742 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:16:51,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2022-07-14 06:16:51,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 572. [2022-07-14 06:16:51,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 500 states have (on average 1.414) internal successors, (707), 545 states have internal predecessors, (707), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 20 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-14 06:16:51,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 743 transitions. [2022-07-14 06:16:51,643 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 743 transitions. Word has length 30 [2022-07-14 06:16:51,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:51,645 INFO L495 AbstractCegarLoop]: Abstraction has 572 states and 743 transitions. [2022-07-14 06:16:51,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:51,646 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 743 transitions. [2022-07-14 06:16:51,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-14 06:16:51,646 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:51,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:51,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-14 06:16:51,647 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr45ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:51,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:51,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1443976913, now seen corresponding path program 1 times [2022-07-14 06:16:51,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:51,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49796602] [2022-07-14 06:16:51,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:51,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:51,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:51,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-14 06:16:51,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:51,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:51,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49796602] [2022-07-14 06:16:51,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49796602] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:51,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:51,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:16:51,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282975290] [2022-07-14 06:16:51,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:51,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:16:51,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:51,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:16:51,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:16:51,782 INFO L87 Difference]: Start difference. First operand 572 states and 743 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:52,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:52,171 INFO L93 Difference]: Finished difference Result 953 states and 1201 transitions. [2022-07-14 06:16:52,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:16:52,172 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-07-14 06:16:52,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:52,175 INFO L225 Difference]: With dead ends: 953 [2022-07-14 06:16:52,175 INFO L226 Difference]: Without dead ends: 953 [2022-07-14 06:16:52,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-07-14 06:16:52,176 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 742 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:52,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 603 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:16:52,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-07-14 06:16:52,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 571. [2022-07-14 06:16:52,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 500 states have (on average 1.406) internal successors, (703), 544 states have internal predecessors, (703), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 20 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-14 06:16:52,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 739 transitions. [2022-07-14 06:16:52,188 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 739 transitions. Word has length 31 [2022-07-14 06:16:52,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:52,188 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 739 transitions. [2022-07-14 06:16:52,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:52,189 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 739 transitions. [2022-07-14 06:16:52,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-14 06:16:52,189 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:52,189 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:52,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-14 06:16:52,190 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:52,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:52,190 INFO L85 PathProgramCache]: Analyzing trace with hash 403780234, now seen corresponding path program 1 times [2022-07-14 06:16:52,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:52,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937969600] [2022-07-14 06:16:52,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:52,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:52,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:52,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-14 06:16:52,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:52,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:52,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:52,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937969600] [2022-07-14 06:16:52,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937969600] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:52,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:52,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:16:52,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066626811] [2022-07-14 06:16:52,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:52,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:16:52,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:52,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:16:52,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:16:52,341 INFO L87 Difference]: Start difference. First operand 571 states and 739 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:52,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:52,531 INFO L93 Difference]: Finished difference Result 618 states and 786 transitions. [2022-07-14 06:16:52,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:16:52,532 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-07-14 06:16:52,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:52,534 INFO L225 Difference]: With dead ends: 618 [2022-07-14 06:16:52,534 INFO L226 Difference]: Without dead ends: 618 [2022-07-14 06:16:52,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:16:52,535 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 106 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:52,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 794 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:16:52,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-07-14 06:16:52,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 550. [2022-07-14 06:16:52,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 479 states have (on average 1.4112734864300627) internal successors, (676), 525 states have internal predecessors, (676), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 18 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-14 06:16:52,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 712 transitions. [2022-07-14 06:16:52,546 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 712 transitions. Word has length 32 [2022-07-14 06:16:52,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:52,547 INFO L495 AbstractCegarLoop]: Abstraction has 550 states and 712 transitions. [2022-07-14 06:16:52,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:52,547 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 712 transitions. [2022-07-14 06:16:52,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-14 06:16:52,548 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:52,548 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:52,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-14 06:16:52,548 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:52,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:52,549 INFO L85 PathProgramCache]: Analyzing trace with hash 407119085, now seen corresponding path program 1 times [2022-07-14 06:16:52,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:52,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431346771] [2022-07-14 06:16:52,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:52,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:52,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:52,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:16:52,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:52,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:52,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:52,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431346771] [2022-07-14 06:16:52,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431346771] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:52,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:52,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:16:52,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588073786] [2022-07-14 06:16:52,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:52,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:16:52,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:52,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:16:52,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:16:52,621 INFO L87 Difference]: Start difference. First operand 550 states and 712 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:52,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:52,741 INFO L93 Difference]: Finished difference Result 669 states and 856 transitions. [2022-07-14 06:16:52,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:16:52,742 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-07-14 06:16:52,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:52,744 INFO L225 Difference]: With dead ends: 669 [2022-07-14 06:16:52,744 INFO L226 Difference]: Without dead ends: 669 [2022-07-14 06:16:52,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:16:52,745 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 354 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:52,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 508 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:16:52,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-07-14 06:16:52,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 549. [2022-07-14 06:16:52,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 479 states have (on average 1.407098121085595) internal successors, (674), 524 states have internal predecessors, (674), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 18 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-14 06:16:52,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 710 transitions. [2022-07-14 06:16:52,756 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 710 transitions. Word has length 33 [2022-07-14 06:16:52,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:52,756 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 710 transitions. [2022-07-14 06:16:52,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:52,757 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 710 transitions. [2022-07-14 06:16:52,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-14 06:16:52,757 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:52,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:52,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-14 06:16:52,758 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:52,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:52,758 INFO L85 PathProgramCache]: Analyzing trace with hash 407119084, now seen corresponding path program 1 times [2022-07-14 06:16:52,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:52,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639212382] [2022-07-14 06:16:52,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:52,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:52,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:16:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:52,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:52,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:52,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639212382] [2022-07-14 06:16:52,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639212382] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:52,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:52,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:16:52,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027502258] [2022-07-14 06:16:52,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:52,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:16:52,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:52,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:16:52,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:16:52,817 INFO L87 Difference]: Start difference. First operand 549 states and 710 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:52,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:52,962 INFO L93 Difference]: Finished difference Result 663 states and 848 transitions. [2022-07-14 06:16:52,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:16:52,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-07-14 06:16:52,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:52,965 INFO L225 Difference]: With dead ends: 663 [2022-07-14 06:16:52,965 INFO L226 Difference]: Without dead ends: 663 [2022-07-14 06:16:52,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:16:52,965 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 333 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:52,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 438 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:16:52,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-07-14 06:16:52,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 548. [2022-07-14 06:16:52,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 479 states have (on average 1.4029227557411275) internal successors, (672), 523 states have internal predecessors, (672), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 18 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-14 06:16:52,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 708 transitions. [2022-07-14 06:16:52,976 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 708 transitions. Word has length 33 [2022-07-14 06:16:52,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:52,976 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 708 transitions. [2022-07-14 06:16:52,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:52,976 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 708 transitions. [2022-07-14 06:16:52,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-14 06:16:52,977 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:52,977 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:52,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-14 06:16:52,977 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:52,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:52,977 INFO L85 PathProgramCache]: Analyzing trace with hash 399419021, now seen corresponding path program 1 times [2022-07-14 06:16:52,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:52,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129669434] [2022-07-14 06:16:52,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:52,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:53,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:16:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:53,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:53,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:53,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129669434] [2022-07-14 06:16:53,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129669434] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:53,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:53,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:16:53,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213313458] [2022-07-14 06:16:53,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:53,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:16:53,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:53,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:16:53,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:16:53,029 INFO L87 Difference]: Start difference. First operand 548 states and 708 transitions. Second operand has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:53,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:53,230 INFO L93 Difference]: Finished difference Result 951 states and 1194 transitions. [2022-07-14 06:16:53,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:16:53,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-07-14 06:16:53,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:53,233 INFO L225 Difference]: With dead ends: 951 [2022-07-14 06:16:53,234 INFO L226 Difference]: Without dead ends: 951 [2022-07-14 06:16:53,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:16:53,234 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 423 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:53,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 599 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:16:53,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-07-14 06:16:53,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 545. [2022-07-14 06:16:53,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 479 states have (on average 1.3903966597077244) internal successors, (666), 520 states have internal predecessors, (666), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 18 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-14 06:16:53,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 702 transitions. [2022-07-14 06:16:53,253 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 702 transitions. Word has length 35 [2022-07-14 06:16:53,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:53,253 INFO L495 AbstractCegarLoop]: Abstraction has 545 states and 702 transitions. [2022-07-14 06:16:53,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:53,253 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 702 transitions. [2022-07-14 06:16:53,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-14 06:16:53,254 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:53,254 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:53,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-14 06:16:53,254 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:53,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:53,255 INFO L85 PathProgramCache]: Analyzing trace with hash 399419022, now seen corresponding path program 1 times [2022-07-14 06:16:53,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:53,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180928693] [2022-07-14 06:16:53,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:53,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:53,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:53,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:16:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:53,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:53,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180928693] [2022-07-14 06:16:53,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180928693] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:53,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:53,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:16:53,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038076880] [2022-07-14 06:16:53,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:53,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:16:53,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:53,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:16:53,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:16:53,366 INFO L87 Difference]: Start difference. First operand 545 states and 702 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:53,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:53,552 INFO L93 Difference]: Finished difference Result 855 states and 1077 transitions. [2022-07-14 06:16:53,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:16:53,553 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-07-14 06:16:53,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:53,556 INFO L225 Difference]: With dead ends: 855 [2022-07-14 06:16:53,556 INFO L226 Difference]: Without dead ends: 855 [2022-07-14 06:16:53,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:16:53,556 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 718 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:53,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [718 Valid, 604 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:16:53,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-07-14 06:16:53,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 544. [2022-07-14 06:16:53,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 479 states have (on average 1.3862212943632568) internal successors, (664), 519 states have internal predecessors, (664), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 18 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-14 06:16:53,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 700 transitions. [2022-07-14 06:16:53,576 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 700 transitions. Word has length 35 [2022-07-14 06:16:53,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:53,576 INFO L495 AbstractCegarLoop]: Abstraction has 544 states and 700 transitions. [2022-07-14 06:16:53,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:53,577 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 700 transitions. [2022-07-14 06:16:53,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-14 06:16:53,577 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:53,577 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:53,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-14 06:16:53,578 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:53,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:53,578 INFO L85 PathProgramCache]: Analyzing trace with hash 399419183, now seen corresponding path program 1 times [2022-07-14 06:16:53,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:53,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83090854] [2022-07-14 06:16:53,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:53,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:53,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:16:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:53,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:53,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83090854] [2022-07-14 06:16:53,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83090854] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:53,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:53,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:16:53,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297856295] [2022-07-14 06:16:53,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:53,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:16:53,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:53,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:16:53,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:16:53,659 INFO L87 Difference]: Start difference. First operand 544 states and 700 transitions. Second operand has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:53,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:53,742 INFO L93 Difference]: Finished difference Result 662 states and 842 transitions. [2022-07-14 06:16:53,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:16:53,742 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-07-14 06:16:53,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:53,758 INFO L225 Difference]: With dead ends: 662 [2022-07-14 06:16:53,758 INFO L226 Difference]: Without dead ends: 662 [2022-07-14 06:16:53,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:16:53,759 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 298 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:53,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 259 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:16:53,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-07-14 06:16:53,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 542. [2022-07-14 06:16:53,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 479 states have (on average 1.3778705636743216) internal successors, (660), 517 states have internal predecessors, (660), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 18 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-14 06:16:53,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 696 transitions. [2022-07-14 06:16:53,778 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 696 transitions. Word has length 35 [2022-07-14 06:16:53,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:53,779 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 696 transitions. [2022-07-14 06:16:53,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:53,779 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 696 transitions. [2022-07-14 06:16:53,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-14 06:16:53,779 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:53,780 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:53,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-14 06:16:53,780 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:53,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:53,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1620073746, now seen corresponding path program 1 times [2022-07-14 06:16:53,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:53,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403127128] [2022-07-14 06:16:53,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:53,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:53,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:53,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-14 06:16:53,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:53,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-14 06:16:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 06:16:53,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:53,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403127128] [2022-07-14 06:16:53,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403127128] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:16:53,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789350970] [2022-07-14 06:16:53,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:53,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:16:53,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:16:53,831 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:16:53,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-14 06:16:53,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:53,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-14 06:16:53,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:16:54,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:54,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:16:54,220 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-14 06:16:54,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-07-14 06:16:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 06:16:54,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789350970] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:16:54,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:16:54,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-07-14 06:16:54,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367660809] [2022-07-14 06:16:54,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:16:54,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 06:16:54,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:54,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 06:16:54,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:16:54,250 INFO L87 Difference]: Start difference. First operand 542 states and 696 transitions. Second operand has 12 states, 11 states have (on average 7.181818181818182) internal successors, (79), 12 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 06:16:54,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:54,887 INFO L93 Difference]: Finished difference Result 1745 states and 2122 transitions. [2022-07-14 06:16:54,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-14 06:16:54,888 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.181818181818182) internal successors, (79), 12 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2022-07-14 06:16:54,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:54,892 INFO L225 Difference]: With dead ends: 1745 [2022-07-14 06:16:54,892 INFO L226 Difference]: Without dead ends: 1745 [2022-07-14 06:16:54,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2022-07-14 06:16:54,893 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 2634 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2636 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:54,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2636 Valid, 1299 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:16:54,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1745 states. [2022-07-14 06:16:54,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1745 to 664. [2022-07-14 06:16:54,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 599 states have (on average 1.332220367278798) internal successors, (798), 631 states have internal predecessors, (798), 16 states have call successors, (16), 8 states have call predecessors, (16), 16 states have return successors, (32), 24 states have call predecessors, (32), 16 states have call successors, (32) [2022-07-14 06:16:54,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 846 transitions. [2022-07-14 06:16:54,912 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 846 transitions. Word has length 43 [2022-07-14 06:16:54,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:54,912 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 846 transitions. [2022-07-14 06:16:54,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.181818181818182) internal successors, (79), 12 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 06:16:54,912 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 846 transitions. [2022-07-14 06:16:54,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-14 06:16:54,913 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:54,913 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:54,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-14 06:16:55,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-07-14 06:16:55,120 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:55,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:55,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1803853866, now seen corresponding path program 1 times [2022-07-14 06:16:55,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:55,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131775021] [2022-07-14 06:16:55,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:55,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:55,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:55,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-14 06:16:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:55,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:55,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:55,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131775021] [2022-07-14 06:16:55,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131775021] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:16:55,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019313857] [2022-07-14 06:16:55,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:55,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:16:55,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:16:55,203 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) [2022-07-14 06:16:55,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-14 06:16:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:55,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-14 06:16:55,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:16:55,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:16:55,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-14 06:16:55,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:16:55,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-14 06:16:55,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:16:55,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:16:55,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019313857] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:55,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:16:55,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2022-07-14 06:16:55,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097807028] [2022-07-14 06:16:55,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:55,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:16:55,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:55,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:16:55,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:16:55,454 INFO L87 Difference]: Start difference. First operand 664 states and 846 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:55,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:55,735 INFO L93 Difference]: Finished difference Result 634 states and 793 transitions. [2022-07-14 06:16:55,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:16:55,736 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-07-14 06:16:55,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:55,737 INFO L225 Difference]: With dead ends: 634 [2022-07-14 06:16:55,737 INFO L226 Difference]: Without dead ends: 634 [2022-07-14 06:16:55,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-07-14 06:16:55,738 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 280 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:55,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 1358 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:16:55,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-07-14 06:16:55,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 476. [2022-07-14 06:16:55,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 427 states have (on average 1.3536299765807962) internal successors, (578), 456 states have internal predecessors, (578), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 15 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-14 06:16:55,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 602 transitions. [2022-07-14 06:16:55,747 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 602 transitions. Word has length 45 [2022-07-14 06:16:55,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:55,747 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 602 transitions. [2022-07-14 06:16:55,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:55,748 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 602 transitions. [2022-07-14 06:16:55,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-14 06:16:55,748 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:55,748 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:55,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-14 06:16:55,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-07-14 06:16:55,966 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:55,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:55,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1377360706, now seen corresponding path program 1 times [2022-07-14 06:16:55,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:55,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585001279] [2022-07-14 06:16:55,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:55,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:55,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:56,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:16:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:56,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:56,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585001279] [2022-07-14 06:16:56,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585001279] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:56,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:56,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-14 06:16:56,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274522609] [2022-07-14 06:16:56,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:56,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 06:16:56,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:56,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 06:16:56,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:16:56,524 INFO L87 Difference]: Start difference. First operand 476 states and 602 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:57,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:57,123 INFO L93 Difference]: Finished difference Result 674 states and 844 transitions. [2022-07-14 06:16:57,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:16:57,123 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-07-14 06:16:57,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:57,125 INFO L225 Difference]: With dead ends: 674 [2022-07-14 06:16:57,125 INFO L226 Difference]: Without dead ends: 674 [2022-07-14 06:16:57,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-07-14 06:16:57,126 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 224 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:57,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 1365 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:16:57,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-07-14 06:16:57,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 498. [2022-07-14 06:16:57,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 449 states have (on average 1.3385300668151447) internal successors, (601), 478 states have internal predecessors, (601), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 15 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-14 06:16:57,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 625 transitions. [2022-07-14 06:16:57,135 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 625 transitions. Word has length 49 [2022-07-14 06:16:57,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:57,136 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 625 transitions. [2022-07-14 06:16:57,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:57,136 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 625 transitions. [2022-07-14 06:16:57,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-14 06:16:57,137 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:57,137 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:57,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-07-14 06:16:57,137 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:57,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:57,138 INFO L85 PathProgramCache]: Analyzing trace with hash 399799259, now seen corresponding path program 1 times [2022-07-14 06:16:57,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:57,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224928511] [2022-07-14 06:16:57,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:57,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:57,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:16:57,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:57,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:57,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:57,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224928511] [2022-07-14 06:16:57,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224928511] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:57,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:57,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-14 06:16:57,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840165917] [2022-07-14 06:16:57,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:57,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-14 06:16:57,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:57,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-14 06:16:57,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:16:57,309 INFO L87 Difference]: Start difference. First operand 498 states and 625 transitions. Second operand has 11 states, 10 states have (on average 4.8) internal successors, (48), 11 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:57,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:57,814 INFO L93 Difference]: Finished difference Result 962 states and 1198 transitions. [2022-07-14 06:16:57,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-14 06:16:57,815 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 11 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-07-14 06:16:57,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:57,817 INFO L225 Difference]: With dead ends: 962 [2022-07-14 06:16:57,817 INFO L226 Difference]: Without dead ends: 962 [2022-07-14 06:16:57,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2022-07-14 06:16:57,817 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 857 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:57,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [859 Valid, 986 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:16:57,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2022-07-14 06:16:57,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 608. [2022-07-14 06:16:57,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 548 states have (on average 1.332116788321168) internal successors, (730), 579 states have internal predecessors, (730), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 21 states have call predecessors, (28), 14 states have call successors, (28) [2022-07-14 06:16:57,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 772 transitions. [2022-07-14 06:16:57,831 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 772 transitions. Word has length 50 [2022-07-14 06:16:57,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:57,831 INFO L495 AbstractCegarLoop]: Abstraction has 608 states and 772 transitions. [2022-07-14 06:16:57,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 11 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:57,832 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 772 transitions. [2022-07-14 06:16:57,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-14 06:16:57,832 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:57,833 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:57,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-14 06:16:57,833 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:57,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:57,834 INFO L85 PathProgramCache]: Analyzing trace with hash 399799260, now seen corresponding path program 1 times [2022-07-14 06:16:57,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:57,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96500798] [2022-07-14 06:16:57,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:57,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:57,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:58,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:16:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:58,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:58,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:58,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96500798] [2022-07-14 06:16:58,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96500798] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:58,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:16:58,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-14 06:16:58,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208157877] [2022-07-14 06:16:58,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:58,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 06:16:58,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:58,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 06:16:58,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:16:58,098 INFO L87 Difference]: Start difference. First operand 608 states and 772 transitions. Second operand has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:58,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:16:58,616 INFO L93 Difference]: Finished difference Result 928 states and 1162 transitions. [2022-07-14 06:16:58,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:16:58,616 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-07-14 06:16:58,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:16:58,618 INFO L225 Difference]: With dead ends: 928 [2022-07-14 06:16:58,618 INFO L226 Difference]: Without dead ends: 928 [2022-07-14 06:16:58,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-07-14 06:16:58,619 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 966 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:16:58,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [966 Valid, 737 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:16:58,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-07-14 06:16:58,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 707. [2022-07-14 06:16:58,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 639 states have (on average 1.3364632237871674) internal successors, (854), 672 states have internal predecessors, (854), 18 states have call successors, (18), 9 states have call predecessors, (18), 18 states have return successors, (36), 25 states have call predecessors, (36), 18 states have call successors, (36) [2022-07-14 06:16:58,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 908 transitions. [2022-07-14 06:16:58,632 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 908 transitions. Word has length 50 [2022-07-14 06:16:58,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:16:58,633 INFO L495 AbstractCegarLoop]: Abstraction has 707 states and 908 transitions. [2022-07-14 06:16:58,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:16:58,633 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 908 transitions. [2022-07-14 06:16:58,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-14 06:16:58,634 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:16:58,634 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:16:58,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-14 06:16:58,634 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:16:58,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:16:58,635 INFO L85 PathProgramCache]: Analyzing trace with hash 397952217, now seen corresponding path program 1 times [2022-07-14 06:16:58,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:16:58,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814133328] [2022-07-14 06:16:58,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:58,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:16:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:58,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:16:58,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:58,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:58,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:16:58,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814133328] [2022-07-14 06:16:58,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814133328] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:16:58,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844798922] [2022-07-14 06:16:58,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:16:58,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:16:58,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:16:58,912 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) [2022-07-14 06:16:58,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-14 06:16:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:16:59,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-14 06:16:59,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:16:59,074 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:16:59,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-14 06:16:59,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-14 06:16:59,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-14 06:16:59,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-14 06:16:59,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-14 06:16:59,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-14 06:16:59,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-14 06:16:59,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:16:59,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:16:59,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844798922] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:16:59,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:16:59,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 22 [2022-07-14 06:16:59,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169143764] [2022-07-14 06:16:59,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:16:59,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-14 06:16:59,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:16:59,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-14 06:16:59,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2022-07-14 06:16:59,408 INFO L87 Difference]: Start difference. First operand 707 states and 908 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:17:00,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:17:00,048 INFO L93 Difference]: Finished difference Result 1592 states and 2006 transitions. [2022-07-14 06:17:00,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 06:17:00,048 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-07-14 06:17:00,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:17:00,052 INFO L225 Difference]: With dead ends: 1592 [2022-07-14 06:17:00,052 INFO L226 Difference]: Without dead ends: 1592 [2022-07-14 06:17:00,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2022-07-14 06:17:00,052 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 718 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 1415 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:17:00,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 1415 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:17:00,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2022-07-14 06:17:00,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 737. [2022-07-14 06:17:00,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 669 states have (on average 1.3288490284005978) internal successors, (889), 702 states have internal predecessors, (889), 18 states have call successors, (18), 9 states have call predecessors, (18), 18 states have return successors, (36), 25 states have call predecessors, (36), 18 states have call successors, (36) [2022-07-14 06:17:00,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 943 transitions. [2022-07-14 06:17:00,072 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 943 transitions. Word has length 50 [2022-07-14 06:17:00,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:17:00,072 INFO L495 AbstractCegarLoop]: Abstraction has 737 states and 943 transitions. [2022-07-14 06:17:00,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:17:00,073 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 943 transitions. [2022-07-14 06:17:00,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-14 06:17:00,073 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:17:00,073 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:17:00,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-14 06:17:00,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:17:00,300 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:17:00,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:17:00,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1779782164, now seen corresponding path program 1 times [2022-07-14 06:17:00,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:17:00,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851992407] [2022-07-14 06:17:00,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:17:00,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:17:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:00,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:17:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:00,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:17:00,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:17:00,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851992407] [2022-07-14 06:17:00,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851992407] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:17:00,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:17:00,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-14 06:17:00,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805527428] [2022-07-14 06:17:00,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:17:00,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-14 06:17:00,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:17:00,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-14 06:17:00,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-07-14 06:17:00,594 INFO L87 Difference]: Start difference. First operand 737 states and 943 transitions. Second operand has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:17:01,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:17:01,612 INFO L93 Difference]: Finished difference Result 1847 states and 2361 transitions. [2022-07-14 06:17:01,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-14 06:17:01,612 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-07-14 06:17:01,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:17:01,615 INFO L225 Difference]: With dead ends: 1847 [2022-07-14 06:17:01,615 INFO L226 Difference]: Without dead ends: 1847 [2022-07-14 06:17:01,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2022-07-14 06:17:01,616 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 842 mSDsluCounter, 1967 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 2187 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:17:01,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [844 Valid, 2187 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1256 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-14 06:17:01,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2022-07-14 06:17:01,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 940. [2022-07-14 06:17:01,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 860 states have (on average 1.3325581395348838) internal successors, (1146), 896 states have internal predecessors, (1146), 24 states have call successors, (24), 12 states have call predecessors, (24), 24 states have return successors, (48), 31 states have call predecessors, (48), 24 states have call successors, (48) [2022-07-14 06:17:01,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1218 transitions. [2022-07-14 06:17:01,642 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1218 transitions. Word has length 50 [2022-07-14 06:17:01,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:17:01,642 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 1218 transitions. [2022-07-14 06:17:01,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:17:01,643 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1218 transitions. [2022-07-14 06:17:01,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-14 06:17:01,643 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:17:01,644 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:17:01,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-07-14 06:17:01,644 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:17:01,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:17:01,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1779782165, now seen corresponding path program 1 times [2022-07-14 06:17:01,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:17:01,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017180090] [2022-07-14 06:17:01,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:17:01,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:17:01,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:01,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:17:01,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:17:01,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:17:01,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017180090] [2022-07-14 06:17:01,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017180090] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:17:01,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:17:01,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-14 06:17:01,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267797106] [2022-07-14 06:17:01,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:17:01,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 06:17:01,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:17:01,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 06:17:01,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:17:01,901 INFO L87 Difference]: Start difference. First operand 940 states and 1218 transitions. Second operand has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:17:02,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:17:02,658 INFO L93 Difference]: Finished difference Result 1869 states and 2407 transitions. [2022-07-14 06:17:02,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-14 06:17:02,659 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-07-14 06:17:02,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:17:02,662 INFO L225 Difference]: With dead ends: 1869 [2022-07-14 06:17:02,662 INFO L226 Difference]: Without dead ends: 1869 [2022-07-14 06:17:02,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-07-14 06:17:02,663 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 625 mSDsluCounter, 1671 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 1951 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:17:02,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 1951 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:17:02,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2022-07-14 06:17:02,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 829. [2022-07-14 06:17:02,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 761 states have (on average 1.3350854139290407) internal successors, (1016), 794 states have internal predecessors, (1016), 18 states have call successors, (18), 9 states have call predecessors, (18), 18 states have return successors, (36), 25 states have call predecessors, (36), 18 states have call successors, (36) [2022-07-14 06:17:02,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1070 transitions. [2022-07-14 06:17:02,682 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1070 transitions. Word has length 50 [2022-07-14 06:17:02,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:17:02,683 INFO L495 AbstractCegarLoop]: Abstraction has 829 states and 1070 transitions. [2022-07-14 06:17:02,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:17:02,683 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1070 transitions. [2022-07-14 06:17:02,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-14 06:17:02,683 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:17:02,684 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:17:02,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-07-14 06:17:02,684 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:17:02,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:17:02,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1777935122, now seen corresponding path program 1 times [2022-07-14 06:17:02,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:17:02,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651296703] [2022-07-14 06:17:02,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:17:02,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:17:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:02,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:17:02,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:02,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:17:02,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:17:02,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651296703] [2022-07-14 06:17:02,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651296703] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:17:02,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:17:02,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-14 06:17:02,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118271202] [2022-07-14 06:17:02,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:17:02,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 06:17:02,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:17:02,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 06:17:02,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:17:02,931 INFO L87 Difference]: Start difference. First operand 829 states and 1070 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:17:03,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:17:03,726 INFO L93 Difference]: Finished difference Result 1629 states and 2052 transitions. [2022-07-14 06:17:03,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:17:03,727 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-07-14 06:17:03,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:17:03,730 INFO L225 Difference]: With dead ends: 1629 [2022-07-14 06:17:03,730 INFO L226 Difference]: Without dead ends: 1629 [2022-07-14 06:17:03,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2022-07-14 06:17:03,731 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 634 mSDsluCounter, 1758 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 2004 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:17:03,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [638 Valid, 2004 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-14 06:17:03,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2022-07-14 06:17:03,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 834. [2022-07-14 06:17:03,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 766 states have (on average 1.3328981723237598) internal successors, (1021), 799 states have internal predecessors, (1021), 18 states have call successors, (18), 9 states have call predecessors, (18), 18 states have return successors, (36), 25 states have call predecessors, (36), 18 states have call successors, (36) [2022-07-14 06:17:03,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1075 transitions. [2022-07-14 06:17:03,751 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1075 transitions. Word has length 50 [2022-07-14 06:17:03,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:17:03,752 INFO L495 AbstractCegarLoop]: Abstraction has 834 states and 1075 transitions. [2022-07-14 06:17:03,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:17:03,752 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1075 transitions. [2022-07-14 06:17:03,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-14 06:17:03,753 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:17:03,753 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:17:03,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-07-14 06:17:03,753 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:17:03,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:17:03,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1311732840, now seen corresponding path program 1 times [2022-07-14 06:17:03,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:17:03,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785037403] [2022-07-14 06:17:03,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:17:03,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:17:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:04,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:17:04,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:04,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:17:04,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:17:04,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785037403] [2022-07-14 06:17:04,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785037403] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:17:04,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321587886] [2022-07-14 06:17:04,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:17:04,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:17:04,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:17:04,084 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) [2022-07-14 06:17:04,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-14 06:17:04,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:04,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-14 06:17:04,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:17:04,250 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 [2022-07-14 06:17:04,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-14 06:17:04,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:17:04,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-14 06:17:04,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-14 06:17:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:17:04,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:17:04,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321587886] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:17:04,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:17:04,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15] total 22 [2022-07-14 06:17:04,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568126159] [2022-07-14 06:17:04,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:17:04,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-14 06:17:04,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:17:04,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-14 06:17:04,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-07-14 06:17:04,672 INFO L87 Difference]: Start difference. First operand 834 states and 1075 transitions. Second operand has 11 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:17:05,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:17:05,159 INFO L93 Difference]: Finished difference Result 1525 states and 1952 transitions. [2022-07-14 06:17:05,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 06:17:05,168 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-07-14 06:17:05,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:17:05,171 INFO L225 Difference]: With dead ends: 1525 [2022-07-14 06:17:05,172 INFO L226 Difference]: Without dead ends: 1525 [2022-07-14 06:17:05,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=256, Invalid=800, Unknown=0, NotChecked=0, Total=1056 [2022-07-14 06:17:05,174 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 867 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:17:05,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [867 Valid, 882 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:17:05,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2022-07-14 06:17:05,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1066. [2022-07-14 06:17:05,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 974 states have (on average 1.3285420944558521) internal successors, (1294), 1013 states have internal predecessors, (1294), 30 states have call successors, (30), 15 states have call predecessors, (30), 30 states have return successors, (60), 37 states have call predecessors, (60), 30 states have call successors, (60) [2022-07-14 06:17:05,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1384 transitions. [2022-07-14 06:17:05,193 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1384 transitions. Word has length 51 [2022-07-14 06:17:05,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:17:05,193 INFO L495 AbstractCegarLoop]: Abstraction has 1066 states and 1384 transitions. [2022-07-14 06:17:05,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:17:05,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1384 transitions. [2022-07-14 06:17:05,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-14 06:17:05,194 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:17:05,194 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:17:05,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-14 06:17:05,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:17:05,408 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:17:05,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:17:05,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1311732841, now seen corresponding path program 1 times [2022-07-14 06:17:05,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:17:05,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047639656] [2022-07-14 06:17:05,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:17:05,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:17:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:05,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:17:05,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:17:05,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:17:05,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047639656] [2022-07-14 06:17:05,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047639656] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:17:05,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:17:05,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-14 06:17:05,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770812781] [2022-07-14 06:17:05,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:17:05,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-14 06:17:05,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:17:05,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-14 06:17:05,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-14 06:17:05,910 INFO L87 Difference]: Start difference. First operand 1066 states and 1384 transitions. Second operand has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:17:07,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:17:07,158 INFO L93 Difference]: Finished difference Result 2540 states and 3330 transitions. [2022-07-14 06:17:07,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-14 06:17:07,164 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-07-14 06:17:07,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:17:07,170 INFO L225 Difference]: With dead ends: 2540 [2022-07-14 06:17:07,170 INFO L226 Difference]: Without dead ends: 2540 [2022-07-14 06:17:07,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=282, Invalid=908, Unknown=0, NotChecked=0, Total=1190 [2022-07-14 06:17:07,173 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 1561 mSDsluCounter, 1150 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1563 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:17:07,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1563 Valid, 1299 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:17:07,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2022-07-14 06:17:07,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 1245. [2022-07-14 06:17:07,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1137 states have (on average 1.3333333333333333) internal successors, (1516), 1180 states have internal predecessors, (1516), 38 states have call successors, (38), 19 states have call predecessors, (38), 38 states have return successors, (76), 45 states have call predecessors, (76), 38 states have call successors, (76) [2022-07-14 06:17:07,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 1630 transitions. [2022-07-14 06:17:07,216 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 1630 transitions. Word has length 51 [2022-07-14 06:17:07,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:17:07,217 INFO L495 AbstractCegarLoop]: Abstraction has 1245 states and 1630 transitions. [2022-07-14 06:17:07,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:17:07,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 1630 transitions. [2022-07-14 06:17:07,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-14 06:17:07,218 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:17:07,218 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:17:07,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-07-14 06:17:07,218 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:17:07,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:17:07,219 INFO L85 PathProgramCache]: Analyzing trace with hash 2066269430, now seen corresponding path program 1 times [2022-07-14 06:17:07,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:17:07,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394769900] [2022-07-14 06:17:07,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:17:07,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:17:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:07,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:17:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:17:07,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:17:07,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394769900] [2022-07-14 06:17:07,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394769900] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:17:07,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:17:07,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-14 06:17:07,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341598334] [2022-07-14 06:17:07,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:17:07,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 06:17:07,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:17:07,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 06:17:07,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:17:07,391 INFO L87 Difference]: Start difference. First operand 1245 states and 1630 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:17:07,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:17:07,685 INFO L93 Difference]: Finished difference Result 1943 states and 2525 transitions. [2022-07-14 06:17:07,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:17:07,685 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-07-14 06:17:07,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:17:07,689 INFO L225 Difference]: With dead ends: 1943 [2022-07-14 06:17:07,690 INFO L226 Difference]: Without dead ends: 1943 [2022-07-14 06:17:07,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-07-14 06:17:07,691 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 938 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:17:07,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [938 Valid, 909 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:17:07,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1943 states. [2022-07-14 06:17:07,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1943 to 1649. [2022-07-14 06:17:07,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1501 states have (on average 1.3324450366422385) internal successors, (2000), 1554 states have internal predecessors, (2000), 58 states have call successors, (58), 29 states have call predecessors, (58), 58 states have return successors, (116), 65 states have call predecessors, (116), 58 states have call successors, (116) [2022-07-14 06:17:07,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2174 transitions. [2022-07-14 06:17:07,724 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2174 transitions. Word has length 52 [2022-07-14 06:17:07,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:17:07,724 INFO L495 AbstractCegarLoop]: Abstraction has 1649 states and 2174 transitions. [2022-07-14 06:17:07,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:17:07,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2174 transitions. [2022-07-14 06:17:07,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-14 06:17:07,725 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:17:07,725 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:17:07,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-07-14 06:17:07,726 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:17:07,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:17:07,726 INFO L85 PathProgramCache]: Analyzing trace with hash 2009011128, now seen corresponding path program 1 times [2022-07-14 06:17:07,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:17:07,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024991244] [2022-07-14 06:17:07,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:17:07,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:17:07,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:08,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:17:08,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:08,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:17:08,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:17:08,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024991244] [2022-07-14 06:17:08,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024991244] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:17:08,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:17:08,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-14 06:17:08,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345217483] [2022-07-14 06:17:08,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:17:08,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-14 06:17:08,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:17:08,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-14 06:17:08,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-14 06:17:08,080 INFO L87 Difference]: Start difference. First operand 1649 states and 2174 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:17:09,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:17:09,162 INFO L93 Difference]: Finished difference Result 2946 states and 3872 transitions. [2022-07-14 06:17:09,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-14 06:17:09,164 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-07-14 06:17:09,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:17:09,170 INFO L225 Difference]: With dead ends: 2946 [2022-07-14 06:17:09,171 INFO L226 Difference]: Without dead ends: 2946 [2022-07-14 06:17:09,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2022-07-14 06:17:09,172 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 1511 mSDsluCounter, 1386 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1513 SdHoareTripleChecker+Valid, 1557 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:17:09,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1513 Valid, 1557 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:17:09,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2946 states. [2022-07-14 06:17:09,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2946 to 1649. [2022-07-14 06:17:09,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1501 states have (on average 1.3324450366422385) internal successors, (2000), 1554 states have internal predecessors, (2000), 58 states have call successors, (58), 29 states have call predecessors, (58), 58 states have return successors, (116), 65 states have call predecessors, (116), 58 states have call successors, (116) [2022-07-14 06:17:09,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2174 transitions. [2022-07-14 06:17:09,224 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2174 transitions. Word has length 52 [2022-07-14 06:17:09,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:17:09,225 INFO L495 AbstractCegarLoop]: Abstraction has 1649 states and 2174 transitions. [2022-07-14 06:17:09,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:17:09,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2174 transitions. [2022-07-14 06:17:09,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-14 06:17:09,226 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:17:09,226 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:17:09,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-07-14 06:17:09,227 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:17:09,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:17:09,227 INFO L85 PathProgramCache]: Analyzing trace with hash 842252799, now seen corresponding path program 1 times [2022-07-14 06:17:09,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:17:09,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098699926] [2022-07-14 06:17:09,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:17:09,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:17:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:09,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:17:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:09,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:17:09,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:17:09,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098699926] [2022-07-14 06:17:09,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098699926] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:17:09,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:17:09,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-14 06:17:09,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51245415] [2022-07-14 06:17:09,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:17:09,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 06:17:09,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:17:09,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 06:17:09,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:17:09,404 INFO L87 Difference]: Start difference. First operand 1649 states and 2174 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:17:09,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:17:09,714 INFO L93 Difference]: Finished difference Result 2035 states and 2650 transitions. [2022-07-14 06:17:09,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:17:09,715 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-07-14 06:17:09,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:17:09,719 INFO L225 Difference]: With dead ends: 2035 [2022-07-14 06:17:09,719 INFO L226 Difference]: Without dead ends: 2035 [2022-07-14 06:17:09,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2022-07-14 06:17:09,720 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 300 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:17:09,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 1157 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:17:09,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2022-07-14 06:17:09,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 1341. [2022-07-14 06:17:09,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1225 states have (on average 1.3338775510204082) internal successors, (1634), 1270 states have internal predecessors, (1634), 42 states have call successors, (42), 21 states have call predecessors, (42), 42 states have return successors, (84), 49 states have call predecessors, (84), 42 states have call successors, (84) [2022-07-14 06:17:09,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 1760 transitions. [2022-07-14 06:17:09,748 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 1760 transitions. Word has length 52 [2022-07-14 06:17:09,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:17:09,748 INFO L495 AbstractCegarLoop]: Abstraction has 1341 states and 1760 transitions. [2022-07-14 06:17:09,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:17:09,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 1760 transitions. [2022-07-14 06:17:09,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-14 06:17:09,749 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:17:09,749 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:17:09,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-07-14 06:17:09,750 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:17:09,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:17:09,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1411489050, now seen corresponding path program 1 times [2022-07-14 06:17:09,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:17:09,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507073473] [2022-07-14 06:17:09,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:17:09,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:17:09,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:10,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:17:10,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:10,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:17:10,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:17:10,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507073473] [2022-07-14 06:17:10,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507073473] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:17:10,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:17:10,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-14 06:17:10,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211227744] [2022-07-14 06:17:10,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:17:10,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 06:17:10,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:17:10,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 06:17:10,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:17:10,047 INFO L87 Difference]: Start difference. First operand 1341 states and 1760 transitions. Second operand has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:17:10,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:17:10,617 INFO L93 Difference]: Finished difference Result 2139 states and 2791 transitions. [2022-07-14 06:17:10,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-14 06:17:10,624 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-07-14 06:17:10,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:17:10,629 INFO L225 Difference]: With dead ends: 2139 [2022-07-14 06:17:10,629 INFO L226 Difference]: Without dead ends: 2139 [2022-07-14 06:17:10,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2022-07-14 06:17:10,630 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 831 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:17:10,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 944 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:17:10,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2022-07-14 06:17:10,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 1849. [2022-07-14 06:17:10,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1685 states have (on average 1.3359050445103857) internal successors, (2251), 1742 states have internal predecessors, (2251), 66 states have call successors, (66), 33 states have call predecessors, (66), 66 states have return successors, (132), 73 states have call predecessors, (132), 66 states have call successors, (132) [2022-07-14 06:17:10,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2449 transitions. [2022-07-14 06:17:10,663 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2449 transitions. Word has length 54 [2022-07-14 06:17:10,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:17:10,663 INFO L495 AbstractCegarLoop]: Abstraction has 1849 states and 2449 transitions. [2022-07-14 06:17:10,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:17:10,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2449 transitions. [2022-07-14 06:17:10,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-14 06:17:10,664 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:17:10,664 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:17:10,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-07-14 06:17:10,665 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:17:10,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:17:10,665 INFO L85 PathProgramCache]: Analyzing trace with hash -2074131620, now seen corresponding path program 1 times [2022-07-14 06:17:10,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:17:10,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095842437] [2022-07-14 06:17:10,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:17:10,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:17:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:10,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:17:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:11,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:17:11,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:17:11,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095842437] [2022-07-14 06:17:11,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095842437] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:17:11,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:17:11,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-14 06:17:11,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602273826] [2022-07-14 06:17:11,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:17:11,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-14 06:17:11,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:17:11,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-14 06:17:11,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-14 06:17:11,010 INFO L87 Difference]: Start difference. First operand 1849 states and 2449 transitions. Second operand has 14 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:17:12,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:17:12,539 INFO L93 Difference]: Finished difference Result 3328 states and 4408 transitions. [2022-07-14 06:17:12,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-14 06:17:12,548 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-07-14 06:17:12,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:17:12,556 INFO L225 Difference]: With dead ends: 3328 [2022-07-14 06:17:12,556 INFO L226 Difference]: Without dead ends: 3328 [2022-07-14 06:17:12,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=379, Invalid=1343, Unknown=0, NotChecked=0, Total=1722 [2022-07-14 06:17:12,557 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 1410 mSDsluCounter, 1326 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1412 SdHoareTripleChecker+Valid, 1512 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:17:12,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1412 Valid, 1512 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:17:12,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2022-07-14 06:17:12,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 1849. [2022-07-14 06:17:12,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1685 states have (on average 1.3359050445103857) internal successors, (2251), 1742 states have internal predecessors, (2251), 66 states have call successors, (66), 33 states have call predecessors, (66), 66 states have return successors, (132), 73 states have call predecessors, (132), 66 states have call successors, (132) [2022-07-14 06:17:12,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2449 transitions. [2022-07-14 06:17:12,601 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2449 transitions. Word has length 54 [2022-07-14 06:17:12,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:17:12,602 INFO L495 AbstractCegarLoop]: Abstraction has 1849 states and 2449 transitions. [2022-07-14 06:17:12,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:17:12,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2449 transitions. [2022-07-14 06:17:12,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-14 06:17:12,605 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:17:12,605 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:17:12,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-07-14 06:17:12,605 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:17:12,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:17:12,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1952545763, now seen corresponding path program 1 times [2022-07-14 06:17:12,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:17:12,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040748626] [2022-07-14 06:17:12,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:17:12,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:17:12,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:12,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:17:12,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:12,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:17:12,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:17:12,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040748626] [2022-07-14 06:17:12,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040748626] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:17:12,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:17:12,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-14 06:17:12,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276806587] [2022-07-14 06:17:12,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:17:12,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 06:17:12,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:17:12,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 06:17:12,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:17:12,878 INFO L87 Difference]: Start difference. First operand 1849 states and 2449 transitions. Second operand has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:17:13,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:17:13,488 INFO L93 Difference]: Finished difference Result 2961 states and 3905 transitions. [2022-07-14 06:17:13,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-14 06:17:13,488 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-07-14 06:17:13,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:17:13,495 INFO L225 Difference]: With dead ends: 2961 [2022-07-14 06:17:13,495 INFO L226 Difference]: Without dead ends: 2961 [2022-07-14 06:17:13,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2022-07-14 06:17:13,496 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 781 mSDsluCounter, 1838 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 2155 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:17:13,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [783 Valid, 2155 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:17:13,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2961 states. [2022-07-14 06:17:13,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2961 to 1821. [2022-07-14 06:17:13,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 1657 states have (on average 1.3349426674713338) internal successors, (2212), 1714 states have internal predecessors, (2212), 66 states have call successors, (66), 33 states have call predecessors, (66), 66 states have return successors, (132), 73 states have call predecessors, (132), 66 states have call successors, (132) [2022-07-14 06:17:13,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 2410 transitions. [2022-07-14 06:17:13,531 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 2410 transitions. Word has length 54 [2022-07-14 06:17:13,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:17:13,531 INFO L495 AbstractCegarLoop]: Abstraction has 1821 states and 2410 transitions. [2022-07-14 06:17:13,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:17:13,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 2410 transitions. [2022-07-14 06:17:13,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-14 06:17:13,532 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:17:13,533 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:17:13,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-07-14 06:17:13,533 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:17:13,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:17:13,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1262088084, now seen corresponding path program 1 times [2022-07-14 06:17:13,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:17:13,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658421508] [2022-07-14 06:17:13,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:17:13,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:17:13,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:13,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:17:13,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:13,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-14 06:17:13,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 06:17:13,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:17:13,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658421508] [2022-07-14 06:17:13,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658421508] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:17:13,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:17:13,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-14 06:17:13,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585100977] [2022-07-14 06:17:13,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:17:13,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-14 06:17:13,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:17:13,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-14 06:17:13,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-14 06:17:13,987 INFO L87 Difference]: Start difference. First operand 1821 states and 2410 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 06:17:15,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:17:15,153 INFO L93 Difference]: Finished difference Result 3722 states and 4937 transitions. [2022-07-14 06:17:15,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-14 06:17:15,153 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2022-07-14 06:17:15,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:17:15,160 INFO L225 Difference]: With dead ends: 3722 [2022-07-14 06:17:15,161 INFO L226 Difference]: Without dead ends: 3720 [2022-07-14 06:17:15,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=283, Invalid=773, Unknown=0, NotChecked=0, Total=1056 [2022-07-14 06:17:15,161 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 1548 mSDsluCounter, 2164 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1548 SdHoareTripleChecker+Valid, 2415 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:17:15,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1548 Valid, 2415 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:17:15,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3720 states. [2022-07-14 06:17:15,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3720 to 1782. [2022-07-14 06:17:15,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1622 states have (on average 1.3298397040690506) internal successors, (2157), 1678 states have internal predecessors, (2157), 64 states have call successors, (64), 32 states have call predecessors, (64), 64 states have return successors, (128), 71 states have call predecessors, (128), 64 states have call successors, (128) [2022-07-14 06:17:15,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 2349 transitions. [2022-07-14 06:17:15,203 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 2349 transitions. Word has length 56 [2022-07-14 06:17:15,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:17:15,204 INFO L495 AbstractCegarLoop]: Abstraction has 1782 states and 2349 transitions. [2022-07-14 06:17:15,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 06:17:15,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 2349 transitions. [2022-07-14 06:17:15,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-14 06:17:15,205 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:17:15,205 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:17:15,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-07-14 06:17:15,206 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:17:15,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:17:15,206 INFO L85 PathProgramCache]: Analyzing trace with hash 829418521, now seen corresponding path program 1 times [2022-07-14 06:17:15,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:17:15,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488138397] [2022-07-14 06:17:15,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:17:15,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:17:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:15,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:17:15,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:15,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-14 06:17:15,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 06:17:15,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:17:15,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488138397] [2022-07-14 06:17:15,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488138397] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:17:15,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896831675] [2022-07-14 06:17:15,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:17:15,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:17:15,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:17:15,648 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) [2022-07-14 06:17:15,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-14 06:17:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:15,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-14 06:17:15,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:17:15,828 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 [2022-07-14 06:17:16,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-14 06:17:16,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:17:16,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-14 06:17:16,275 INFO L356 Elim1Store]: treesize reduction 36, result has 37.9 percent of original size [2022-07-14 06:17:16,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 33 [2022-07-14 06:17:16,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-14 06:17:16,339 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:17:16,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:17:16,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896831675] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:17:16,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:17:16,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 24 [2022-07-14 06:17:16,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2649530] [2022-07-14 06:17:16,457 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:17:16,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-14 06:17:16,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:17:16,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-14 06:17:16,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-07-14 06:17:16,459 INFO L87 Difference]: Start difference. First operand 1782 states and 2349 transitions. Second operand has 25 states, 24 states have (on average 4.166666666666667) internal successors, (100), 22 states have internal predecessors, (100), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 06:17:17,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:17:17,557 INFO L93 Difference]: Finished difference Result 3018 states and 3950 transitions. [2022-07-14 06:17:17,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-14 06:17:17,558 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.166666666666667) internal successors, (100), 22 states have internal predecessors, (100), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 56 [2022-07-14 06:17:17,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:17:17,565 INFO L225 Difference]: With dead ends: 3018 [2022-07-14 06:17:17,565 INFO L226 Difference]: Without dead ends: 3018 [2022-07-14 06:17:17,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=497, Invalid=1953, Unknown=0, NotChecked=0, Total=2450 [2022-07-14 06:17:17,567 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 2486 mSDsluCounter, 1519 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2487 SdHoareTripleChecker+Valid, 1679 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:17:17,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2487 Valid, 1679 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:17:17,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2022-07-14 06:17:17,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 1812. [2022-07-14 06:17:17,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1652 states have (on average 1.3286924939467313) internal successors, (2195), 1705 states have internal predecessors, (2195), 64 states have call successors, (64), 32 states have call predecessors, (64), 64 states have return successors, (128), 74 states have call predecessors, (128), 64 states have call successors, (128) [2022-07-14 06:17:17,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 2387 transitions. [2022-07-14 06:17:17,625 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 2387 transitions. Word has length 56 [2022-07-14 06:17:17,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:17:17,626 INFO L495 AbstractCegarLoop]: Abstraction has 1812 states and 2387 transitions. [2022-07-14 06:17:17,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.166666666666667) internal successors, (100), 22 states have internal predecessors, (100), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 06:17:17,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 2387 transitions. [2022-07-14 06:17:17,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-14 06:17:17,627 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:17:17,627 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:17:17,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-14 06:17:17,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:17:17,854 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:17:17,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:17:17,854 INFO L85 PathProgramCache]: Analyzing trace with hash 829418522, now seen corresponding path program 1 times [2022-07-14 06:17:17,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:17:17,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770298896] [2022-07-14 06:17:17,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:17:17,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:17:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:18,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:17:18,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:18,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-14 06:17:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 06:17:18,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:17:18,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770298896] [2022-07-14 06:17:18,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770298896] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:17:18,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135803441] [2022-07-14 06:17:18,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:17:18,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:17:18,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:17:18,456 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) [2022-07-14 06:17:18,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-14 06:17:18,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:18,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-14 06:17:18,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:17:18,645 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 [2022-07-14 06:17:19,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-07-14 06:17:19,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-14 06:17:19,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:17:19,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2022-07-14 06:17:19,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:17:19,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 46 [2022-07-14 06:17:19,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:17:19,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2022-07-14 06:17:19,417 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-14 06:17:19,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-14 06:17:19,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-07-14 06:17:19,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2022-07-14 06:17:19,575 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:17:19,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:17:19,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135803441] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:17:19,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:17:19,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 29 [2022-07-14 06:17:19,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036972032] [2022-07-14 06:17:19,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:17:19,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-14 06:17:19,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:17:19,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-14 06:17:19,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2022-07-14 06:17:19,773 INFO L87 Difference]: Start difference. First operand 1812 states and 2387 transitions. Second operand has 30 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 27 states have internal predecessors, (101), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 06:17:22,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:17:22,649 INFO L93 Difference]: Finished difference Result 3570 states and 4717 transitions. [2022-07-14 06:17:22,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-14 06:17:22,649 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 27 states have internal predecessors, (101), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 56 [2022-07-14 06:17:22,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:17:22,656 INFO L225 Difference]: With dead ends: 3570 [2022-07-14 06:17:22,657 INFO L226 Difference]: Without dead ends: 3570 [2022-07-14 06:17:22,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=666, Invalid=3116, Unknown=0, NotChecked=0, Total=3782 [2022-07-14 06:17:22,658 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 3871 mSDsluCounter, 2516 mSDsCounter, 0 mSdLazyCounter, 1947 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3872 SdHoareTripleChecker+Valid, 2671 SdHoareTripleChecker+Invalid, 2244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:17:22,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3872 Valid, 2671 Invalid, 2244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1947 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-14 06:17:22,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3570 states. [2022-07-14 06:17:22,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3570 to 1812. [2022-07-14 06:17:22,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1652 states have (on average 1.3268765133171914) internal successors, (2192), 1705 states have internal predecessors, (2192), 64 states have call successors, (64), 32 states have call predecessors, (64), 64 states have return successors, (128), 74 states have call predecessors, (128), 64 states have call successors, (128) [2022-07-14 06:17:22,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 2384 transitions. [2022-07-14 06:17:22,696 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 2384 transitions. Word has length 56 [2022-07-14 06:17:22,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:17:22,696 INFO L495 AbstractCegarLoop]: Abstraction has 1812 states and 2384 transitions. [2022-07-14 06:17:22,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 27 states have internal predecessors, (101), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 06:17:22,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 2384 transitions. [2022-07-14 06:17:22,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-14 06:17:22,698 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:17:22,698 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:17:22,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-14 06:17:22,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:17:22,915 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:17:22,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:17:22,915 INFO L85 PathProgramCache]: Analyzing trace with hash -997629707, now seen corresponding path program 1 times [2022-07-14 06:17:22,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:17:22,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570801769] [2022-07-14 06:17:22,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:17:22,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:17:22,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:23,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:17:23,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:23,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-14 06:17:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:23,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 06:17:23,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:17:23,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570801769] [2022-07-14 06:17:23,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570801769] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:17:23,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713938056] [2022-07-14 06:17:23,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:17:23,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:17:23,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:17:23,533 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) [2022-07-14 06:17:23,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-14 06:17:23,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:23,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-14 06:17:23,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:17:23,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-14 06:17:24,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:17:24,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2022-07-14 06:17:24,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:17:24,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:17:24,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:17:24,359 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:17:24,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 64 [2022-07-14 06:17:24,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:17:24,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:17:25,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 98 [2022-07-14 06:17:25,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 98 [2022-07-14 06:17:25,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 06:17:25,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713938056] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:17:25,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:17:25,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 16] total 45 [2022-07-14 06:17:25,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311433821] [2022-07-14 06:17:25,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:17:25,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-14 06:17:25,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:17:25,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-14 06:17:25,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1823, Unknown=0, NotChecked=0, Total=1980 [2022-07-14 06:17:25,651 INFO L87 Difference]: Start difference. First operand 1812 states and 2384 transitions. Second operand has 45 states, 45 states have (on average 3.2888888888888888) internal successors, (148), 42 states have internal predecessors, (148), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-14 06:17:34,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:17:34,252 INFO L93 Difference]: Finished difference Result 7246 states and 9494 transitions. [2022-07-14 06:17:34,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-07-14 06:17:34,253 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.2888888888888888) internal successors, (148), 42 states have internal predecessors, (148), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 56 [2022-07-14 06:17:34,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:17:34,267 INFO L225 Difference]: With dead ends: 7246 [2022-07-14 06:17:34,267 INFO L226 Difference]: Without dead ends: 7244 [2022-07-14 06:17:34,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3259 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2201, Invalid=10231, Unknown=0, NotChecked=0, Total=12432 [2022-07-14 06:17:34,269 INFO L413 NwaCegarLoop]: 757 mSDtfsCounter, 3650 mSDsluCounter, 18583 mSDsCounter, 0 mSdLazyCounter, 8021 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3650 SdHoareTripleChecker+Valid, 19340 SdHoareTripleChecker+Invalid, 8342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 8021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:17:34,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3650 Valid, 19340 Invalid, 8342 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [321 Valid, 8021 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-07-14 06:17:34,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7244 states. [2022-07-14 06:17:34,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7244 to 1771. [2022-07-14 06:17:34,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1771 states, 1615 states have (on average 1.3195046439628484) internal successors, (2131), 1667 states have internal predecessors, (2131), 62 states have call successors, (62), 31 states have call predecessors, (62), 62 states have return successors, (124), 72 states have call predecessors, (124), 62 states have call successors, (124) [2022-07-14 06:17:34,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1771 states to 1771 states and 2317 transitions. [2022-07-14 06:17:34,365 INFO L78 Accepts]: Start accepts. Automaton has 1771 states and 2317 transitions. Word has length 56 [2022-07-14 06:17:34,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:17:34,365 INFO L495 AbstractCegarLoop]: Abstraction has 1771 states and 2317 transitions. [2022-07-14 06:17:34,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.2888888888888888) internal successors, (148), 42 states have internal predecessors, (148), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-14 06:17:34,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1771 states and 2317 transitions. [2022-07-14 06:17:34,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-14 06:17:34,366 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:17:34,367 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:17:34,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-14 06:17:34,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:17:34,594 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:17:34,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:17:34,595 INFO L85 PathProgramCache]: Analyzing trace with hash -773789015, now seen corresponding path program 1 times [2022-07-14 06:17:34,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:17:34,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428860530] [2022-07-14 06:17:34,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:17:34,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:17:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:34,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:17:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:34,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-14 06:17:34,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 06:17:34,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:17:34,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428860530] [2022-07-14 06:17:34,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428860530] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:17:34,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671155224] [2022-07-14 06:17:34,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:17:34,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:17:34,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:17:34,797 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) [2022-07-14 06:17:34,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-14 06:17:34,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:34,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-14 06:17:34,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:17:34,988 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 [2022-07-14 06:17:35,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-14 06:17:35,472 INFO L356 Elim1Store]: treesize reduction 42, result has 38.2 percent of original size [2022-07-14 06:17:35,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 37 [2022-07-14 06:17:35,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:17:35,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-14 06:17:35,587 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:17:35,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:17:35,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671155224] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:17:35,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:17:35,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-07-14 06:17:35,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093033494] [2022-07-14 06:17:35,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:17:35,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-14 06:17:35,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:17:35,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-14 06:17:35,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-07-14 06:17:35,647 INFO L87 Difference]: Start difference. First operand 1771 states and 2317 transitions. Second operand has 20 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 06:17:36,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:17:36,350 INFO L93 Difference]: Finished difference Result 3365 states and 4398 transitions. [2022-07-14 06:17:36,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-14 06:17:36,350 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2022-07-14 06:17:36,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:17:36,356 INFO L225 Difference]: With dead ends: 3365 [2022-07-14 06:17:36,357 INFO L226 Difference]: Without dead ends: 3365 [2022-07-14 06:17:36,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2022-07-14 06:17:36,358 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 828 mSDsluCounter, 2015 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 2234 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:17:36,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [828 Valid, 2234 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 791 Invalid, 0 Unknown, 166 Unchecked, 0.4s Time] [2022-07-14 06:17:36,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2022-07-14 06:17:36,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 3110. [2022-07-14 06:17:36,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3110 states, 2842 states have (on average 1.322308233638283) internal successors, (3758), 2925 states have internal predecessors, (3758), 112 states have call successors, (112), 62 states have call predecessors, (112), 124 states have return successors, (224), 122 states have call predecessors, (224), 112 states have call successors, (224) [2022-07-14 06:17:36,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3110 states to 3110 states and 4094 transitions. [2022-07-14 06:17:36,418 INFO L78 Accepts]: Start accepts. Automaton has 3110 states and 4094 transitions. Word has length 57 [2022-07-14 06:17:36,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:17:36,418 INFO L495 AbstractCegarLoop]: Abstraction has 3110 states and 4094 transitions. [2022-07-14 06:17:36,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 06:17:36,419 INFO L276 IsEmpty]: Start isEmpty. Operand 3110 states and 4094 transitions. [2022-07-14 06:17:36,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-14 06:17:36,420 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:17:36,420 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:17:36,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-14 06:17:36,635 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,SelfDestructingSolverStorable63 [2022-07-14 06:17:36,635 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:17:36,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:17:36,636 INFO L85 PathProgramCache]: Analyzing trace with hash -773789014, now seen corresponding path program 1 times [2022-07-14 06:17:36,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:17:36,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729590002] [2022-07-14 06:17:36,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:17:36,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:17:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:36,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:17:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:36,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-14 06:17:36,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:36,914 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 06:17:36,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:17:36,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729590002] [2022-07-14 06:17:36,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729590002] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:17:36,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041212666] [2022-07-14 06:17:36,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:17:36,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:17:36,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:17:36,920 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) [2022-07-14 06:17:36,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-14 06:17:37,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:37,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-14 06:17:37,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:17:37,106 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 [2022-07-14 06:17:37,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-14 06:17:37,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-14 06:17:37,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:17:37,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-07-14 06:17:37,804 INFO L356 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2022-07-14 06:17:37,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-07-14 06:17:38,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:17:38,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-14 06:17:38,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:17:38,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-14 06:17:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:17:38,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:17:38,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041212666] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:17:38,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:17:38,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 25 [2022-07-14 06:17:38,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409814286] [2022-07-14 06:17:38,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:17:38,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-14 06:17:38,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:17:38,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-14 06:17:38,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-07-14 06:17:38,239 INFO L87 Difference]: Start difference. First operand 3110 states and 4094 transitions. Second operand has 26 states, 25 states have (on average 4.2) internal successors, (105), 24 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 06:17:40,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:17:40,131 INFO L93 Difference]: Finished difference Result 5221 states and 6875 transitions. [2022-07-14 06:17:40,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-14 06:17:40,131 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.2) internal successors, (105), 24 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2022-07-14 06:17:40,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:17:40,139 INFO L225 Difference]: With dead ends: 5221 [2022-07-14 06:17:40,139 INFO L226 Difference]: Without dead ends: 5221 [2022-07-14 06:17:40,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=413, Invalid=2137, Unknown=0, NotChecked=0, Total=2550 [2022-07-14 06:17:40,140 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 1723 mSDsluCounter, 2992 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1723 SdHoareTripleChecker+Valid, 3234 SdHoareTripleChecker+Invalid, 2009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 507 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-14 06:17:40,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1723 Valid, 3234 Invalid, 2009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1377 Invalid, 0 Unknown, 507 Unchecked, 0.7s Time] [2022-07-14 06:17:40,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5221 states. [2022-07-14 06:17:40,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5221 to 4407. [2022-07-14 06:17:40,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4407 states, 4045 states have (on average 1.323114956736712) internal successors, (5352), 4147 states have internal predecessors, (5352), 156 states have call successors, (156), 87 states have call predecessors, (156), 174 states have return successors, (312), 172 states have call predecessors, (312), 156 states have call successors, (312) [2022-07-14 06:17:40,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4407 states to 4407 states and 5820 transitions. [2022-07-14 06:17:40,253 INFO L78 Accepts]: Start accepts. Automaton has 4407 states and 5820 transitions. Word has length 57 [2022-07-14 06:17:40,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:17:40,254 INFO L495 AbstractCegarLoop]: Abstraction has 4407 states and 5820 transitions. [2022-07-14 06:17:40,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.2) internal successors, (105), 24 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 06:17:40,254 INFO L276 IsEmpty]: Start isEmpty. Operand 4407 states and 5820 transitions. [2022-07-14 06:17:40,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-14 06:17:40,255 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:17:40,255 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:17:40,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-14 06:17:40,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:17:40,455 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:17:40,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:17:40,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1165513920, now seen corresponding path program 1 times [2022-07-14 06:17:40,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:17:40,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731715129] [2022-07-14 06:17:40,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:17:40,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:17:40,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:40,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:17:40,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:40,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-14 06:17:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:40,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 06:17:40,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:17:40,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731715129] [2022-07-14 06:17:40,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731715129] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:17:40,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261866484] [2022-07-14 06:17:40,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:17:40,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:17:40,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:17:40,772 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) [2022-07-14 06:17:40,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-14 06:17:40,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:40,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-14 06:17:40,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:17:41,018 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 [2022-07-14 06:17:41,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-14 06:17:41,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:17:41,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-14 06:17:41,477 INFO L356 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-07-14 06:17:41,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-07-14 06:17:41,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-14 06:17:41,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:17:41,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:17:41,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261866484] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:17:41,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:17:41,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 23 [2022-07-14 06:17:41,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218278074] [2022-07-14 06:17:41,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:17:41,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-14 06:17:41,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:17:41,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-14 06:17:41,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-07-14 06:17:41,610 INFO L87 Difference]: Start difference. First operand 4407 states and 5820 transitions. Second operand has 24 states, 23 states have (on average 4.521739130434782) internal successors, (104), 20 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 06:17:42,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:17:42,812 INFO L93 Difference]: Finished difference Result 6237 states and 8242 transitions. [2022-07-14 06:17:42,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-14 06:17:42,815 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.521739130434782) internal successors, (104), 20 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2022-07-14 06:17:42,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:17:42,827 INFO L225 Difference]: With dead ends: 6237 [2022-07-14 06:17:42,828 INFO L226 Difference]: Without dead ends: 6237 [2022-07-14 06:17:42,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=292, Invalid=1114, Unknown=0, NotChecked=0, Total=1406 [2022-07-14 06:17:42,829 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 1366 mSDsluCounter, 2634 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1366 SdHoareTripleChecker+Valid, 2924 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-14 06:17:42,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1366 Valid, 2924 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1623 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-14 06:17:42,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6237 states. [2022-07-14 06:17:42,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6237 to 4473. [2022-07-14 06:17:42,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4473 states, 4111 states have (on average 1.3218195086353686) internal successors, (5434), 4207 states have internal predecessors, (5434), 156 states have call successors, (156), 87 states have call predecessors, (156), 174 states have return successors, (312), 178 states have call predecessors, (312), 156 states have call successors, (312) [2022-07-14 06:17:42,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4473 states to 4473 states and 5902 transitions. [2022-07-14 06:17:42,921 INFO L78 Accepts]: Start accepts. Automaton has 4473 states and 5902 transitions. Word has length 57 [2022-07-14 06:17:42,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:17:42,921 INFO L495 AbstractCegarLoop]: Abstraction has 4473 states and 5902 transitions. [2022-07-14 06:17:42,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.521739130434782) internal successors, (104), 20 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 06:17:42,921 INFO L276 IsEmpty]: Start isEmpty. Operand 4473 states and 5902 transitions. [2022-07-14 06:17:42,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-14 06:17:42,922 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:17:42,922 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:17:42,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-14 06:17:43,139 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,SelfDestructingSolverStorable65 [2022-07-14 06:17:43,139 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:17:43,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:17:43,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1165513919, now seen corresponding path program 1 times [2022-07-14 06:17:43,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:17:43,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297955352] [2022-07-14 06:17:43,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:17:43,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:17:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:43,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:17:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:43,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-14 06:17:43,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:43,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 06:17:43,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:17:43,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297955352] [2022-07-14 06:17:43,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297955352] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:17:43,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924368142] [2022-07-14 06:17:43,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:17:43,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:17:43,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:17:43,660 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) [2022-07-14 06:17:43,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-14 06:17:43,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:43,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 91 conjunts are in the unsatisfiable core [2022-07-14 06:17:43,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:17:43,897 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 [2022-07-14 06:17:43,905 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 [2022-07-14 06:17:44,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-14 06:17:44,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-14 06:17:44,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:17:44,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2022-07-14 06:17:44,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:17:44,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-07-14 06:17:44,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:17:44,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-14 06:17:44,624 INFO L356 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2022-07-14 06:17:44,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-07-14 06:17:44,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-14 06:17:44,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-14 06:17:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:17:44,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:17:44,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924368142] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:17:44,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:17:44,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 25 [2022-07-14 06:17:44,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985614893] [2022-07-14 06:17:44,986 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:17:44,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-14 06:17:44,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:17:44,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-14 06:17:44,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2022-07-14 06:17:44,987 INFO L87 Difference]: Start difference. First operand 4473 states and 5902 transitions. Second operand has 26 states, 25 states have (on average 4.12) internal successors, (103), 22 states have internal predecessors, (103), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 06:17:47,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:17:47,511 INFO L93 Difference]: Finished difference Result 7486 states and 9907 transitions. [2022-07-14 06:17:47,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-14 06:17:47,512 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.12) internal successors, (103), 22 states have internal predecessors, (103), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2022-07-14 06:17:47,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:17:47,523 INFO L225 Difference]: With dead ends: 7486 [2022-07-14 06:17:47,523 INFO L226 Difference]: Without dead ends: 7486 [2022-07-14 06:17:47,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=528, Invalid=2228, Unknown=0, NotChecked=0, Total=2756 [2022-07-14 06:17:47,524 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 2209 mSDsluCounter, 3429 mSDsCounter, 0 mSdLazyCounter, 2446 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2209 SdHoareTripleChecker+Valid, 3722 SdHoareTripleChecker+Invalid, 2568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 2446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:17:47,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2209 Valid, 3722 Invalid, 2568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 2446 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-14 06:17:47,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7486 states. [2022-07-14 06:17:47,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7486 to 4566. [2022-07-14 06:17:47,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4566 states, 4204 states have (on average 1.318744053282588) internal successors, (5544), 4291 states have internal predecessors, (5544), 156 states have call successors, (156), 87 states have call predecessors, (156), 174 states have return successors, (312), 187 states have call predecessors, (312), 156 states have call successors, (312) [2022-07-14 06:17:47,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4566 states to 4566 states and 6012 transitions. [2022-07-14 06:17:47,616 INFO L78 Accepts]: Start accepts. Automaton has 4566 states and 6012 transitions. Word has length 57 [2022-07-14 06:17:47,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:17:47,617 INFO L495 AbstractCegarLoop]: Abstraction has 4566 states and 6012 transitions. [2022-07-14 06:17:47,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.12) internal successors, (103), 22 states have internal predecessors, (103), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 06:17:47,617 INFO L276 IsEmpty]: Start isEmpty. Operand 4566 states and 6012 transitions. [2022-07-14 06:17:47,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-14 06:17:47,618 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:17:47,618 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:17:47,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-14 06:17:47,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-07-14 06:17:47,824 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:17:47,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:17:47,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1940784111, now seen corresponding path program 1 times [2022-07-14 06:17:47,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:17:47,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099241876] [2022-07-14 06:17:47,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:17:47,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:17:47,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:48,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:17:48,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:17:48,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:17:48,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099241876] [2022-07-14 06:17:48,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099241876] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:17:48,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041999426] [2022-07-14 06:17:48,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:17:48,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:17:48,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:17:48,361 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:17:48,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-14 06:17:48,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:17:48,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-14 06:17:48,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:17:48,592 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:17:48,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-14 06:17:48,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:17:48,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:17:49,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:17:49,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-14 06:17:49,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:17:49,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-14 06:17:49,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:17:49,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-14 06:17:49,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:17:49,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-14 06:17:49,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-14 06:17:49,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-07-14 06:17:49,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:17:49,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:17:49,662 INFO L356 Elim1Store]: treesize reduction 31, result has 20.5 percent of original size [2022-07-14 06:17:49,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 85 treesize of output 45 [2022-07-14 06:17:49,672 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:17:49,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-07-14 06:17:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:17:49,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:17:49,948 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:17:49,948 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2022-07-14 06:17:49,958 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:17:49,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 30 [2022-07-14 06:17:50,343 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:17:50,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 38 [2022-07-14 06:17:50,405 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:17:50,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 1076 treesize of output 1077 [2022-07-14 06:17:50,456 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:17:50,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 976 treesize of output 910 [2022-07-14 06:17:50,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:17:50,484 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:17:50,485 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 922 treesize of output 804 [2022-07-14 06:19:03,872 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:19:03,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 50 [2022-07-14 06:19:03,884 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:19:03,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2022-07-14 06:19:03,899 INFO L356 Elim1Store]: treesize reduction 3, result has 82.4 percent of original size [2022-07-14 06:19:03,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 112 [2022-07-14 06:19:03,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:19:03,954 INFO L356 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2022-07-14 06:19:03,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 690 treesize of output 674 [2022-07-14 06:19:03,972 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:19:03,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 660 treesize of output 548 [2022-07-14 06:19:03,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 307 treesize of output 243 [2022-07-14 06:19:03,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 454 treesize of output 438 [2022-07-14 06:19:03,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 406 [2022-07-14 06:19:05,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041999426] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:19:05,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:19:05,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2022-07-14 06:19:05,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282420250] [2022-07-14 06:19:05,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:19:05,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-14 06:19:05,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:19:05,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-14 06:19:05,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1657, Unknown=24, NotChecked=0, Total=1806 [2022-07-14 06:19:05,985 INFO L87 Difference]: Start difference. First operand 4566 states and 6012 transitions. Second operand has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 31 states have internal predecessors, (104), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 06:19:07,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:19:07,855 INFO L93 Difference]: Finished difference Result 8217 states and 11031 transitions. [2022-07-14 06:19:07,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-14 06:19:07,856 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 31 states have internal predecessors, (104), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 57 [2022-07-14 06:19:07,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:19:07,869 INFO L225 Difference]: With dead ends: 8217 [2022-07-14 06:19:07,869 INFO L226 Difference]: Without dead ends: 8217 [2022-07-14 06:19:07,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=424, Invalid=2858, Unknown=24, NotChecked=0, Total=3306 [2022-07-14 06:19:07,870 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 2139 mSDsluCounter, 4361 mSDsCounter, 0 mSdLazyCounter, 1743 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2139 SdHoareTripleChecker+Valid, 4578 SdHoareTripleChecker+Invalid, 2127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-14 06:19:07,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2139 Valid, 4578 Invalid, 2127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1743 Invalid, 0 Unknown, 248 Unchecked, 0.9s Time] [2022-07-14 06:19:07,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8217 states. [2022-07-14 06:19:07,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8217 to 4974. [2022-07-14 06:19:07,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4974 states, 4586 states have (on average 1.3148713475795901) internal successors, (6030), 4677 states have internal predecessors, (6030), 170 states have call successors, (170), 93 states have call predecessors, (170), 186 states have return successors, (340), 203 states have call predecessors, (340), 170 states have call successors, (340) [2022-07-14 06:19:07,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4974 states to 4974 states and 6540 transitions. [2022-07-14 06:19:07,964 INFO L78 Accepts]: Start accepts. Automaton has 4974 states and 6540 transitions. Word has length 57 [2022-07-14 06:19:07,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:19:07,964 INFO L495 AbstractCegarLoop]: Abstraction has 4974 states and 6540 transitions. [2022-07-14 06:19:07,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 31 states have internal predecessors, (104), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 06:19:07,965 INFO L276 IsEmpty]: Start isEmpty. Operand 4974 states and 6540 transitions. [2022-07-14 06:19:07,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-14 06:19:07,966 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:19:07,966 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:19:07,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-14 06:19:08,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-07-14 06:19:08,180 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-07-14 06:19:08,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:19:08,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1239719533, now seen corresponding path program 1 times [2022-07-14 06:19:08,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:19:08,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900935832] [2022-07-14 06:19:08,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:08,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:19:08,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:19:09,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 06:19:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:19:09,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:19:09,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:19:09,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900935832] [2022-07-14 06:19:09,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900935832] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:19:09,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193301937] [2022-07-14 06:19:09,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:09,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:19:09,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:19:09,196 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:19:09,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-14 06:19:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:19:09,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-14 06:19:09,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:19:09,371 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:19:09,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-14 06:19:09,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-14 06:19:09,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-14 06:19:09,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:19:09,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-14 06:19:09,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:19:09,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-14 06:19:09,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:19:09,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-14 06:19:09,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:19:09,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-14 06:19:09,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:19:09,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-14 06:19:09,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:19:09,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-07-14 06:19:10,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:19:10,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:19:10,017 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-07-14 06:19:10,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 51 [2022-07-14 06:19:10,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-07-14 06:19:10,236 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:19:10,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2022-07-14 06:19:10,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:19:10,245 INFO L356 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2022-07-14 06:19:10,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 22 [2022-07-14 06:19:10,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:19:10,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:19:10,507 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1314 (Array Int Int)) (v_ArrVal_1312 Int)) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1314) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|) v_ArrVal_1312)) |c_~#list~0.base|) (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_BEG 4)))) 4) 0)) (forall ((v_ArrVal_1312 Int)) (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|) v_ArrVal_1312)))) (select .cse0 (select (select .cse0 |c_~#list~0.base|) (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_BEG 4))))) 4) 0))) is different from false [2022-07-14 06:19:11,837 INFO L356 Elim1Store]: treesize reduction 28, result has 54.8 percent of original size [2022-07-14 06:19:11,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 141 treesize of output 99 [2022-07-14 06:19:11,990 INFO L356 Elim1Store]: treesize reduction 126, result has 61.2 percent of original size [2022-07-14 06:19:11,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 2331 treesize of output 2307 [2022-07-14 06:19:12,050 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:19:12,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 4294 treesize of output 3998 [2022-07-14 06:19:18,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2022-07-14 06:19:18,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2022-07-14 06:19:39,736 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-14 06:19:39,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1785 treesize of output 1 [2022-07-14 06:19:42,303 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-14 06:19:42,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2050 treesize of output 1 [2022-07-14 06:19:52,171 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-14 06:19:52,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1568 treesize of output 1 [2022-07-14 06:19:54,389 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-14 06:19:54,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1833 treesize of output 1 [2022-07-14 06:20:11,030 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:20:11,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 210 [2022-07-14 06:20:12,916 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-14 06:20:12,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1618 treesize of output 1 [2022-07-14 06:20:13,064 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-14 06:20:13,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1353 treesize of output 1 [2022-07-14 06:20:13,292 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-14 06:20:13,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1562 treesize of output 1 [2022-07-14 06:20:13,381 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:20:13,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1576 treesize of output 1536 [2022-07-14 06:20:21,089 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:20:21,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1841 treesize of output 1789