./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0235-1.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-0235-1.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 6e8dd9d71aae7a8c83467a9093ad4bffb4ddd59cddc2d90362f34ff651f24f9a --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:18:23,772 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:18:23,775 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:18:23,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:18:23,825 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:18:23,827 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:18:23,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:18:23,833 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:18:23,835 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:18:23,841 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:18:23,842 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:18:23,844 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:18:23,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:18:23,846 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:18:23,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:18:23,851 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:18:23,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:18:23,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:18:23,855 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:18:23,858 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:18:23,864 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:18:23,865 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:18:23,866 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:18:23,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:18:23,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:18:23,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:18:23,872 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:18:23,873 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:18:23,873 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:18:23,874 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:18:23,875 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:18:23,876 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:18:23,877 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:18:23,877 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:18:23,878 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:18:23,879 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:18:23,879 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:18:23,880 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:18:23,880 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:18:23,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:18:23,881 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:18:23,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:18:23,885 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 06:18:23,918 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:18:23,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:18:23,919 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:18:23,919 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:18:23,920 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:18:23,920 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:18:23,921 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:18:23,921 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:18:23,921 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:18:23,922 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:18:23,923 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:18:23,923 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:18:23,923 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:18:23,923 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:18:23,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:18:23,924 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:18:23,924 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:18:23,924 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:18:23,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:18:23,926 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:18:23,926 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:18:23,926 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:18:23,926 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:18:23,926 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:18:23,927 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:18:23,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:18:23,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:18:23,927 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:18:23,928 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 06:18:23,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 06:18:23,928 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e8dd9d71aae7a8c83467a9093ad4bffb4ddd59cddc2d90362f34ff651f24f9a [2022-07-14 06:18:24,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:18:24,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:18:24,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:18:24,185 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:18:24,185 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:18:24,186 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0235-1.i [2022-07-14 06:18:24,252 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12d7ff6ff/afb415e15c0947c9a7e3ac63cf9245b8/FLAG2be150af3 [2022-07-14 06:18:24,745 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:18:24,746 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0235-1.i [2022-07-14 06:18:24,765 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12d7ff6ff/afb415e15c0947c9a7e3ac63cf9245b8/FLAG2be150af3 [2022-07-14 06:18:25,105 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12d7ff6ff/afb415e15c0947c9a7e3ac63cf9245b8 [2022-07-14 06:18:25,108 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:18:25,109 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:18:25,110 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:18:25,110 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:18:25,114 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:18:25,115 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:18:25" (1/1) ... [2022-07-14 06:18:25,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19e05d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:18:25, skipping insertion in model container [2022-07-14 06:18:25,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:18:25" (1/1) ... [2022-07-14 06:18:25,125 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:18:25,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:18:25,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:18:25,484 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 06:18:25,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:18:25,552 INFO L208 MainTranslator]: Completed translation [2022-07-14 06:18:25,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:18:25 WrapperNode [2022-07-14 06:18:25,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:18:25,554 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 06:18:25,554 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 06:18:25,554 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 06:18:25,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:18:25" (1/1) ... [2022-07-14 06:18:25,593 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:18:25" (1/1) ... [2022-07-14 06:18:25,631 INFO L137 Inliner]: procedures = 188, calls = 69, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 234 [2022-07-14 06:18:25,632 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 06:18:25,632 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 06:18:25,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 06:18:25,633 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 06:18:25,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:18:25" (1/1) ... [2022-07-14 06:18:25,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:18:25" (1/1) ... [2022-07-14 06:18:25,656 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:18:25" (1/1) ... [2022-07-14 06:18:25,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:18:25" (1/1) ... [2022-07-14 06:18:25,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:18:25" (1/1) ... [2022-07-14 06:18:25,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:18:25" (1/1) ... [2022-07-14 06:18:25,683 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:18:25" (1/1) ... [2022-07-14 06:18:25,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 06:18:25,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 06:18:25,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 06:18:25,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 06:18:25,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:18:25" (1/1) ... [2022-07-14 06:18:25,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:18:25,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:18:25,725 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 06:18:25,744 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 06:18:25,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-14 06:18:25,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-14 06:18:25,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-14 06:18:25,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-14 06:18:25,766 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2022-07-14 06:18:25,766 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2022-07-14 06:18:25,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 06:18:25,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-14 06:18:25,766 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2022-07-14 06:18:25,766 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2022-07-14 06:18:25,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-14 06:18:25,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 06:18:25,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 06:18:25,923 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 06:18:25,924 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 06:18:26,422 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 06:18:26,429 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 06:18:26,432 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-07-14 06:18:26,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:18:26 BoogieIcfgContainer [2022-07-14 06:18:26,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 06:18:26,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 06:18:26,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 06:18:26,439 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 06:18:26,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 06:18:25" (1/3) ... [2022-07-14 06:18:26,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@656f6255 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:18:26, skipping insertion in model container [2022-07-14 06:18:26,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:18:25" (2/3) ... [2022-07-14 06:18:26,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@656f6255 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:18:26, skipping insertion in model container [2022-07-14 06:18:26,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:18:26" (3/3) ... [2022-07-14 06:18:26,442 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0235-1.i [2022-07-14 06:18:26,452 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 06:18:26,452 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 85 error locations. [2022-07-14 06:18:26,497 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 06:18:26,502 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@1d84e21b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1b667eb0 [2022-07-14 06:18:26,504 INFO L358 AbstractCegarLoop]: Starting to check reachability of 85 error locations. [2022-07-14 06:18:26,509 INFO L276 IsEmpty]: Start isEmpty. Operand has 233 states, 134 states have (on average 1.873134328358209) internal successors, (251), 219 states have internal predecessors, (251), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-14 06:18:26,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-14 06:18:26,518 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:18:26,518 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-14 06:18:26,519 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:18:26,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:18:26,524 INFO L85 PathProgramCache]: Analyzing trace with hash 930118, now seen corresponding path program 1 times [2022-07-14 06:18:26,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:18:26,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644637418] [2022-07-14 06:18:26,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:26,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:18:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:18:26,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:18:26,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:18:26,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644637418] [2022-07-14 06:18:26,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644637418] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:18:26,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:18:26,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:18:26,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924192855] [2022-07-14 06:18:26,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:18:26,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-14 06:18:26,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:18:26,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-14 06:18:26,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-14 06:18:26,665 INFO L87 Difference]: Start difference. First operand has 233 states, 134 states have (on average 1.873134328358209) internal successors, (251), 219 states have internal predecessors, (251), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:18:26,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:18:26,713 INFO L93 Difference]: Finished difference Result 233 states and 262 transitions. [2022-07-14 06:18:26,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-14 06:18:26,716 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-07-14 06:18:26,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:18:26,724 INFO L225 Difference]: With dead ends: 233 [2022-07-14 06:18:26,724 INFO L226 Difference]: Without dead ends: 231 [2022-07-14 06:18:26,726 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 06:18:26,728 INFO L413 NwaCegarLoop]: 262 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, 262 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 06:18:26,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:18:26,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-14 06:18:26,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-07-14 06:18:26,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 133 states have (on average 1.7894736842105263) internal successors, (238), 217 states have internal predecessors, (238), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-14 06:18:26,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 260 transitions. [2022-07-14 06:18:26,770 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 260 transitions. Word has length 4 [2022-07-14 06:18:26,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:18:26,771 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 260 transitions. [2022-07-14 06:18:26,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:18:26,771 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 260 transitions. [2022-07-14 06:18:26,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 06:18:26,771 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:18:26,772 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 06:18:26,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-14 06:18:26,772 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:18:26,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:18:26,773 INFO L85 PathProgramCache]: Analyzing trace with hash 889932981, now seen corresponding path program 1 times [2022-07-14 06:18:26,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:18:26,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663331844] [2022-07-14 06:18:26,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:26,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:18:26,793 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:18:26,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193009506] [2022-07-14 06:18:26,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:26,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:18:26,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:18:26,797 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 06:18:26,822 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 06:18:26,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:18:26,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 06:18:26,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:18:26,924 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 06:18:26,932 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 06:18:26,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:18:26,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:18:26,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663331844] [2022-07-14 06:18:26,933 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:18:26,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193009506] [2022-07-14 06:18:26,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193009506] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:18:26,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:18:26,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:18:26,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715931991] [2022-07-14 06:18:26,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:18:26,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:18:26,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:18:26,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:18:26,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:18:26,945 INFO L87 Difference]: Start difference. First operand 231 states and 260 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:18:27,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:18:27,076 INFO L93 Difference]: Finished difference Result 230 states and 259 transitions. [2022-07-14 06:18:27,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:18:27,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-14 06:18:27,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:18:27,078 INFO L225 Difference]: With dead ends: 230 [2022-07-14 06:18:27,078 INFO L226 Difference]: Without dead ends: 230 [2022-07-14 06:18:27,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 06:18:27,079 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 9 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:18:27,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 418 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:18:27,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-07-14 06:18:27,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2022-07-14 06:18:27,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 133 states have (on average 1.781954887218045) internal successors, (237), 216 states have internal predecessors, (237), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-14 06:18:27,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 259 transitions. [2022-07-14 06:18:27,093 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 259 transitions. Word has length 6 [2022-07-14 06:18:27,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:18:27,093 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 259 transitions. [2022-07-14 06:18:27,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:18:27,094 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 259 transitions. [2022-07-14 06:18:27,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 06:18:27,094 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:18:27,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:18:27,120 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 06:18:27,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:18:27,308 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:18:27,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:18:27,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1818119056, now seen corresponding path program 1 times [2022-07-14 06:18:27,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:18:27,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987405583] [2022-07-14 06:18:27,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:27,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:18:27,320 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:18:27,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1423733346] [2022-07-14 06:18:27,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:27,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:18:27,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:18:27,324 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 06:18:27,328 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 06:18:27,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:18:27,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 06:18:27,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:18:27,528 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 06:18:27,600 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 06:18:27,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:18:27,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:18:27,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987405583] [2022-07-14 06:18:27,601 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:18:27,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423733346] [2022-07-14 06:18:27,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423733346] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:18:27,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:18:27,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:18:27,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310141588] [2022-07-14 06:18:27,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:18:27,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:18:27,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:18:27,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:18:27,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:18:27,604 INFO L87 Difference]: Start difference. First operand 230 states and 259 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:18:27,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:18:27,639 INFO L93 Difference]: Finished difference Result 229 states and 258 transitions. [2022-07-14 06:18:27,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:18:27,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-14 06:18:27,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:18:27,642 INFO L225 Difference]: With dead ends: 229 [2022-07-14 06:18:27,643 INFO L226 Difference]: Without dead ends: 229 [2022-07-14 06:18:27,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 06:18:27,645 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 0 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:18:27,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 443 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 70 Unchecked, 0.0s Time] [2022-07-14 06:18:27,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-07-14 06:18:27,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-07-14 06:18:27,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 133 states have (on average 1.7744360902255638) internal successors, (236), 215 states have internal predecessors, (236), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-14 06:18:27,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 258 transitions. [2022-07-14 06:18:27,670 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 258 transitions. Word has length 7 [2022-07-14 06:18:27,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:18:27,671 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 258 transitions. [2022-07-14 06:18:27,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:18:27,671 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 258 transitions. [2022-07-14 06:18:27,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-14 06:18:27,673 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:18:27,673 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 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 06:18:27,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-14 06:18:27,887 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,SelfDestructingSolverStorable2 [2022-07-14 06:18:27,888 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:18:27,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:18:27,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1115615018, now seen corresponding path program 1 times [2022-07-14 06:18:27,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:18:27,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356184963] [2022-07-14 06:18:27,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:27,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:18:27,926 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:18:27,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2006746218] [2022-07-14 06:18:27,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:27,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:18:27,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:18:27,929 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 06:18:27,946 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 06:18:28,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:18:28,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-14 06:18:28,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:18:28,263 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:18:28,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-14 06:18:28,285 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-14 06:18:28,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:18:28,529 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-14 06:18:28,529 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 06:18:28,544 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-14 06:18:28,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:18:28,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356184963] [2022-07-14 06:18:28,545 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:18:28,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006746218] [2022-07-14 06:18:28,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006746218] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:18:28,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:18:28,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2022-07-14 06:18:28,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041630447] [2022-07-14 06:18:28,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:18:28,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-14 06:18:28,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:18:28,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-14 06:18:28,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-14 06:18:28,548 INFO L87 Difference]: Start difference. First operand 229 states and 258 transitions. Second operand has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-14 06:18:29,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:18:29,019 INFO L93 Difference]: Finished difference Result 364 states and 423 transitions. [2022-07-14 06:18:29,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:18:29,019 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2022-07-14 06:18:29,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:18:29,022 INFO L225 Difference]: With dead ends: 364 [2022-07-14 06:18:29,022 INFO L226 Difference]: Without dead ends: 364 [2022-07-14 06:18:29,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-07-14 06:18:29,023 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 215 mSDsluCounter, 1736 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 1921 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 301 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:18:29,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 1921 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 843 Invalid, 0 Unknown, 301 Unchecked, 0.4s Time] [2022-07-14 06:18:29,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-07-14 06:18:29,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 227. [2022-07-14 06:18:29,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 133 states have (on average 1.7593984962406015) internal successors, (234), 213 states have internal predecessors, (234), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-14 06:18:29,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 256 transitions. [2022-07-14 06:18:29,036 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 256 transitions. Word has length 73 [2022-07-14 06:18:29,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:18:29,036 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 256 transitions. [2022-07-14 06:18:29,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-14 06:18:29,036 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 256 transitions. [2022-07-14 06:18:29,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-14 06:18:29,037 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:18:29,037 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 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 06:18:29,067 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 06:18:29,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:18:29,256 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:18:29,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:18:29,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1115615019, now seen corresponding path program 1 times [2022-07-14 06:18:29,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:18:29,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121023919] [2022-07-14 06:18:29,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:29,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:18:29,284 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:18:29,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48286742] [2022-07-14 06:18:29,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:29,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:18:29,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:18:29,287 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 06:18:29,288 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 06:18:29,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:18:29,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-14 06:18:29,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:18:32,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:18:32,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-14 06:18:32,024 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:18:32,024 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 06:18:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-14 06:18:32,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:18:32,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:18:32,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121023919] [2022-07-14 06:18:32,147 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:18:32,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48286742] [2022-07-14 06:18:32,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48286742] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:18:32,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:18:32,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-07-14 06:18:32,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548686448] [2022-07-14 06:18:32,148 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-14 06:18:32,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-14 06:18:32,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:18:32,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-14 06:18:32,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=205, Unknown=1, NotChecked=0, Total=240 [2022-07-14 06:18:32,149 INFO L87 Difference]: Start difference. First operand 227 states and 256 transitions. Second operand has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:18:32,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:18:32,493 INFO L93 Difference]: Finished difference Result 337 states and 393 transitions. [2022-07-14 06:18:32,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 06:18:32,494 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 73 [2022-07-14 06:18:32,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:18:32,496 INFO L225 Difference]: With dead ends: 337 [2022-07-14 06:18:32,496 INFO L226 Difference]: Without dead ends: 337 [2022-07-14 06:18:32,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=64, Invalid=441, Unknown=1, NotChecked=0, Total=506 [2022-07-14 06:18:32,497 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 110 mSDsluCounter, 1352 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1550 SdHoareTripleChecker+Invalid, 2352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2111 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:18:32,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1550 Invalid, 2352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 230 Invalid, 0 Unknown, 2111 Unchecked, 0.2s Time] [2022-07-14 06:18:32,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-07-14 06:18:32,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 236. [2022-07-14 06:18:32,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 140 states have (on average 1.7285714285714286) internal successors, (242), 220 states have internal predecessors, (242), 12 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (19), 13 states have call predecessors, (19), 12 states have call successors, (19) [2022-07-14 06:18:32,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 273 transitions. [2022-07-14 06:18:32,507 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 273 transitions. Word has length 73 [2022-07-14 06:18:32,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:18:32,507 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 273 transitions. [2022-07-14 06:18:32,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:18:32,508 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 273 transitions. [2022-07-14 06:18:32,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-14 06:18:32,509 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:18:32,509 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 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 06:18:32,536 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 06:18:32,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:18:32,728 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:18:32,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:18:32,728 INFO L85 PathProgramCache]: Analyzing trace with hash -739950276, now seen corresponding path program 1 times [2022-07-14 06:18:32,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:18:32,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547557324] [2022-07-14 06:18:32,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:32,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:18:32,746 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:18:32,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312358782] [2022-07-14 06:18:32,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:32,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:18:32,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:18:32,751 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 06:18:32,771 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 06:18:32,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:18:32,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-14 06:18:32,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:18:32,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-14 06:18:33,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:18:33,318 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 21 treesize of output 21 [2022-07-14 06:18:33,336 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:18:33,337 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 06:18:33,376 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 73 proven. 9 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-14 06:18:33,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:18:33,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:18:33,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547557324] [2022-07-14 06:18:33,465 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:18:33,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312358782] [2022-07-14 06:18:33,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312358782] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:18:33,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:18:33,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-07-14 06:18:33,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534890336] [2022-07-14 06:18:33,465 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-14 06:18:33,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 06:18:33,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:18:33,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 06:18:33,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-07-14 06:18:33,466 INFO L87 Difference]: Start difference. First operand 236 states and 273 transitions. Second operand has 12 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:18:34,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:18:34,412 INFO L93 Difference]: Finished difference Result 336 states and 392 transitions. [2022-07-14 06:18:34,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-14 06:18:34,413 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 74 [2022-07-14 06:18:34,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:18:34,414 INFO L225 Difference]: With dead ends: 336 [2022-07-14 06:18:34,414 INFO L226 Difference]: Without dead ends: 336 [2022-07-14 06:18:34,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-07-14 06:18:34,415 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 111 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 1726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 550 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-14 06:18:34,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 697 Invalid, 1726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1165 Invalid, 0 Unknown, 550 Unchecked, 0.8s Time] [2022-07-14 06:18:34,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-07-14 06:18:34,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 226. [2022-07-14 06:18:34,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 133 states have (on average 1.7518796992481203) internal successors, (233), 212 states have internal predecessors, (233), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-14 06:18:34,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 255 transitions. [2022-07-14 06:18:34,424 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 255 transitions. Word has length 74 [2022-07-14 06:18:34,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:18:34,425 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 255 transitions. [2022-07-14 06:18:34,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:18:34,425 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 255 transitions. [2022-07-14 06:18:34,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-14 06:18:34,426 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:18:34,426 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 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 06:18:34,474 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 06:18:34,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:18:34,637 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:18:34,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:18:34,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1635791477, now seen corresponding path program 1 times [2022-07-14 06:18:34,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:18:34,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141258568] [2022-07-14 06:18:34,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:34,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:18:34,652 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:18:34,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828513473] [2022-07-14 06:18:34,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:34,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:18:34,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:18:34,654 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 06:18:34,655 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 06:18:34,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:18:34,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-14 06:18:34,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:18:34,953 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:18:34,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-14 06:18:35,029 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:18:35,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-14 06:18:35,045 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-14 06:18:35,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:18:35,327 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-14 06:18:35,327 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 06:18:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-14 06:18:35,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:18:35,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141258568] [2022-07-14 06:18:35,338 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:18:35,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828513473] [2022-07-14 06:18:35,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828513473] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:18:35,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:18:35,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2022-07-14 06:18:35,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735151317] [2022-07-14 06:18:35,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:18:35,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-14 06:18:35,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:18:35,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-14 06:18:35,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-07-14 06:18:35,339 INFO L87 Difference]: Start difference. First operand 226 states and 255 transitions. Second operand has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-14 06:18:35,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:18:35,806 INFO L93 Difference]: Finished difference Result 369 states and 430 transitions. [2022-07-14 06:18:35,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:18:35,807 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 75 [2022-07-14 06:18:35,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:18:35,809 INFO L225 Difference]: With dead ends: 369 [2022-07-14 06:18:35,809 INFO L226 Difference]: Without dead ends: 369 [2022-07-14 06:18:35,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 131 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-07-14 06:18:35,810 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 289 mSDsluCounter, 1625 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 1804 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 368 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:18:35,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 1804 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 912 Invalid, 0 Unknown, 368 Unchecked, 0.4s Time] [2022-07-14 06:18:35,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-07-14 06:18:35,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 232. [2022-07-14 06:18:35,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 138 states have (on average 1.7246376811594204) internal successors, (238), 216 states have internal predecessors, (238), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-14 06:18:35,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 264 transitions. [2022-07-14 06:18:35,819 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 264 transitions. Word has length 75 [2022-07-14 06:18:35,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:18:35,819 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 264 transitions. [2022-07-14 06:18:35,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-14 06:18:35,820 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 264 transitions. [2022-07-14 06:18:35,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-14 06:18:35,820 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:18:35,821 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 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 06:18:35,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-14 06:18:36,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:18:36,046 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:18:36,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:18:36,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1635791476, now seen corresponding path program 1 times [2022-07-14 06:18:36,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:18:36,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693241042] [2022-07-14 06:18:36,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:36,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:18:36,061 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:18:36,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1244119812] [2022-07-14 06:18:36,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:36,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:18:36,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:18:36,076 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 06:18:36,097 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 06:18:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:18:36,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-14 06:18:36,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:18:36,235 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-14 06:18:36,801 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-14 06:18:36,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-14 06:18:36,807 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 21 treesize of output 21 [2022-07-14 06:18:36,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:18:36,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-14 06:18:36,993 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-14 06:18:36,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-14 06:18:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-14 06:18:37,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:18:37,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:18:37,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693241042] [2022-07-14 06:18:37,162 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:18:37,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244119812] [2022-07-14 06:18:37,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244119812] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:18:37,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:18:37,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-07-14 06:18:37,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876061800] [2022-07-14 06:18:37,163 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-14 06:18:37,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-14 06:18:37,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:18:37,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-14 06:18:37,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-07-14 06:18:37,164 INFO L87 Difference]: Start difference. First operand 232 states and 264 transitions. Second operand has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-14 06:18:38,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:18:38,353 INFO L93 Difference]: Finished difference Result 333 states and 383 transitions. [2022-07-14 06:18:38,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 06:18:38,355 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 75 [2022-07-14 06:18:38,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:18:38,356 INFO L225 Difference]: With dead ends: 333 [2022-07-14 06:18:38,356 INFO L226 Difference]: Without dead ends: 333 [2022-07-14 06:18:38,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-07-14 06:18:38,357 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 113 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 2479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1318 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:18:38,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 1257 Invalid, 2479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1149 Invalid, 0 Unknown, 1318 Unchecked, 1.0s Time] [2022-07-14 06:18:38,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-07-14 06:18:38,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 232. [2022-07-14 06:18:38,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 138 states have (on average 1.7173913043478262) internal successors, (237), 216 states have internal predecessors, (237), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-14 06:18:38,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 263 transitions. [2022-07-14 06:18:38,362 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 263 transitions. Word has length 75 [2022-07-14 06:18:38,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:18:38,362 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 263 transitions. [2022-07-14 06:18:38,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-14 06:18:38,362 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 263 transitions. [2022-07-14 06:18:38,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-14 06:18:38,363 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:18:38,364 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 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 06:18:38,383 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 06:18:38,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:18:38,578 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:18:38,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:18:38,579 INFO L85 PathProgramCache]: Analyzing trace with hash 830071777, now seen corresponding path program 1 times [2022-07-14 06:18:38,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:18:38,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987034748] [2022-07-14 06:18:38,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:38,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:18:38,603 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:18:38,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703567752] [2022-07-14 06:18:38,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:38,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:18:38,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:18:38,605 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 06:18:38,606 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 06:18:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:18:38,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 06:18:38,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:18:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-14 06:18:38,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:18:38,804 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 8 treesize of output 6 [2022-07-14 06:18:38,858 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-14 06:18:38,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:18:38,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987034748] [2022-07-14 06:18:38,859 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:18:38,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703567752] [2022-07-14 06:18:38,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703567752] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:18:38,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:18:38,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-14 06:18:38,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835855582] [2022-07-14 06:18:38,861 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:18:38,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 06:18:38,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:18:38,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 06:18:38,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:18:38,863 INFO L87 Difference]: Start difference. First operand 232 states and 263 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:18:39,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:18:39,055 INFO L93 Difference]: Finished difference Result 250 states and 288 transitions. [2022-07-14 06:18:39,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:18:39,056 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 76 [2022-07-14 06:18:39,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:18:39,057 INFO L225 Difference]: With dead ends: 250 [2022-07-14 06:18:39,057 INFO L226 Difference]: Without dead ends: 250 [2022-07-14 06:18:39,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-14 06:18:39,058 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 305 mSDsluCounter, 1268 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 1495 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:18:39,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 1495 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:18:39,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-07-14 06:18:39,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 231. [2022-07-14 06:18:39,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 138 states have (on average 1.710144927536232) internal successors, (236), 215 states have internal predecessors, (236), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-14 06:18:39,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 262 transitions. [2022-07-14 06:18:39,062 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 262 transitions. Word has length 76 [2022-07-14 06:18:39,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:18:39,063 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 262 transitions. [2022-07-14 06:18:39,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:18:39,063 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 262 transitions. [2022-07-14 06:18:39,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-14 06:18:39,069 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:18:39,069 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 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 06:18:39,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-14 06:18:39,279 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,SelfDestructingSolverStorable8 [2022-07-14 06:18:39,279 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:18:39,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:18:39,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1164939870, now seen corresponding path program 1 times [2022-07-14 06:18:39,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:18:39,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211444368] [2022-07-14 06:18:39,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:39,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:18:39,297 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:18:39,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [495296891] [2022-07-14 06:18:39,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:39,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:18:39,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:18:39,301 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 06:18:39,302 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 06:18:39,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:18:39,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 06:18:39,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:18:39,438 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-14 06:18:39,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:18:39,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:18:39,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211444368] [2022-07-14 06:18:39,439 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:18:39,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495296891] [2022-07-14 06:18:39,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495296891] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:18:39,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:18:39,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:18:39,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237503551] [2022-07-14 06:18:39,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:18:39,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:18:39,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:18:39,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:18:39,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:18:39,442 INFO L87 Difference]: Start difference. First operand 231 states and 262 transitions. Second operand has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-14 06:18:39,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:18:39,532 INFO L93 Difference]: Finished difference Result 238 states and 273 transitions. [2022-07-14 06:18:39,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:18:39,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 78 [2022-07-14 06:18:39,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:18:39,534 INFO L225 Difference]: With dead ends: 238 [2022-07-14 06:18:39,534 INFO L226 Difference]: Without dead ends: 238 [2022-07-14 06:18:39,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 76 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 06:18:39,535 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 90 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:18:39,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 353 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:18:39,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-07-14 06:18:39,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 230. [2022-07-14 06:18:39,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 138 states have (on average 1.7028985507246377) internal successors, (235), 214 states have internal predecessors, (235), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-14 06:18:39,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 261 transitions. [2022-07-14 06:18:39,539 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 261 transitions. Word has length 78 [2022-07-14 06:18:39,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:18:39,539 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 261 transitions. [2022-07-14 06:18:39,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-14 06:18:39,540 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 261 transitions. [2022-07-14 06:18:39,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-14 06:18:39,540 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:18:39,540 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:18:39,558 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 06:18:39,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-14 06:18:39,749 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:18:39,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:18:39,749 INFO L85 PathProgramCache]: Analyzing trace with hash -76043767, now seen corresponding path program 1 times [2022-07-14 06:18:39,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:18:39,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651278164] [2022-07-14 06:18:39,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:39,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:18:39,772 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:18:39,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [109719312] [2022-07-14 06:18:39,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:39,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:18:39,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:18:39,780 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 06:18:39,781 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 06:18:39,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:18:39,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-14 06:18:39,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:18:40,006 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-14 06:18:40,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-14 06:18:40,052 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-14 06:18:40,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-14 06:18:40,159 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:18:40,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-14 06:18:40,179 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 73 proven. 40 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-14 06:18:40,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:18:40,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:18:40,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651278164] [2022-07-14 06:18:40,339 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:18:40,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109719312] [2022-07-14 06:18:40,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109719312] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:18:40,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:18:40,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-07-14 06:18:40,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980167323] [2022-07-14 06:18:40,340 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-14 06:18:40,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-14 06:18:40,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:18:40,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-14 06:18:40,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-07-14 06:18:40,341 INFO L87 Difference]: Start difference. First operand 230 states and 261 transitions. Second operand has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:18:40,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:18:40,825 INFO L93 Difference]: Finished difference Result 399 states and 465 transitions. [2022-07-14 06:18:40,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-14 06:18:40,826 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 82 [2022-07-14 06:18:40,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:18:40,827 INFO L225 Difference]: With dead ends: 399 [2022-07-14 06:18:40,827 INFO L226 Difference]: Without dead ends: 399 [2022-07-14 06:18:40,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-07-14 06:18:40,828 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 263 mSDsluCounter, 1874 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 2065 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 480 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:18:40,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 2065 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 964 Invalid, 0 Unknown, 480 Unchecked, 0.4s Time] [2022-07-14 06:18:40,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-07-14 06:18:40,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 262. [2022-07-14 06:18:40,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 165 states have (on average 1.612121212121212) internal successors, (266), 240 states have internal predecessors, (266), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-14 06:18:40,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 302 transitions. [2022-07-14 06:18:40,834 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 302 transitions. Word has length 82 [2022-07-14 06:18:40,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:18:40,834 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 302 transitions. [2022-07-14 06:18:40,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:18:40,834 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 302 transitions. [2022-07-14 06:18:40,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-14 06:18:40,835 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:18:40,835 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:18:40,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-14 06:18:41,035 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,SelfDestructingSolverStorable10 [2022-07-14 06:18:41,035 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:18:41,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:18:41,036 INFO L85 PathProgramCache]: Analyzing trace with hash -76043766, now seen corresponding path program 1 times [2022-07-14 06:18:41,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:18:41,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466598191] [2022-07-14 06:18:41,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:41,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:18:41,053 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:18:41,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [891007183] [2022-07-14 06:18:41,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:41,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:18:41,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:18:41,055 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 06:18:41,056 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 06:18:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:18:41,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-14 06:18:41,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:18:41,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-14 06:18:41,803 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-14 06:18:41,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-14 06:18:41,810 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 21 treesize of output 21 [2022-07-14 06:18:42,066 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-14 06:18:42,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-14 06:18:42,071 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 21 treesize of output 21 [2022-07-14 06:18:42,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:18:42,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-14 06:18:42,237 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-14 06:18:42,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-14 06:18:42,366 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 73 proven. 48 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-14 06:18:42,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:18:42,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:18:42,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466598191] [2022-07-14 06:18:42,500 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:18:42,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891007183] [2022-07-14 06:18:42,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891007183] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:18:42,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:18:42,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-07-14 06:18:42,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479074553] [2022-07-14 06:18:42,501 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-14 06:18:42,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-14 06:18:42,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:18:42,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-14 06:18:42,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-07-14 06:18:42,502 INFO L87 Difference]: Start difference. First operand 262 states and 302 transitions. Second operand has 22 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-14 06:18:43,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:18:43,992 INFO L93 Difference]: Finished difference Result 371 states and 431 transitions. [2022-07-14 06:18:43,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 06:18:43,993 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 82 [2022-07-14 06:18:43,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:18:43,994 INFO L225 Difference]: With dead ends: 371 [2022-07-14 06:18:43,995 INFO L226 Difference]: Without dead ends: 371 [2022-07-14 06:18:43,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-07-14 06:18:43,996 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 116 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 1124 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1442 SdHoareTripleChecker+Invalid, 3920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2784 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:18:43,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 1442 Invalid, 3920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1124 Invalid, 0 Unknown, 2784 Unchecked, 1.0s Time] [2022-07-14 06:18:43,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-07-14 06:18:44,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 269. [2022-07-14 06:18:44,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 172 states have (on average 1.5930232558139534) internal successors, (274), 247 states have internal predecessors, (274), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-14 06:18:44,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 310 transitions. [2022-07-14 06:18:44,002 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 310 transitions. Word has length 82 [2022-07-14 06:18:44,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:18:44,002 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 310 transitions. [2022-07-14 06:18:44,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-14 06:18:44,002 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 310 transitions. [2022-07-14 06:18:44,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-14 06:18:44,003 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:18:44,003 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:18:44,022 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 06:18:44,211 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,SelfDestructingSolverStorable11 [2022-07-14 06:18:44,211 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:18:44,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:18:44,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1937610552, now seen corresponding path program 1 times [2022-07-14 06:18:44,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:18:44,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881452892] [2022-07-14 06:18:44,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:44,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:18:44,230 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:18:44,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061296754] [2022-07-14 06:18:44,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:44,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:18:44,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:18:44,232 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 06:18:44,233 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 06:18:44,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:18:44,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 06:18:44,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:18:44,382 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-14 06:18:44,383 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:18:44,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:18:44,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881452892] [2022-07-14 06:18:44,383 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:18:44,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061296754] [2022-07-14 06:18:44,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061296754] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:18:44,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:18:44,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:18:44,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478033577] [2022-07-14 06:18:44,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:18:44,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:18:44,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:18:44,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:18:44,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:18:44,385 INFO L87 Difference]: Start difference. First operand 269 states and 310 transitions. Second operand has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:18:44,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:18:44,506 INFO L93 Difference]: Finished difference Result 282 states and 328 transitions. [2022-07-14 06:18:44,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:18:44,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 83 [2022-07-14 06:18:44,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:18:44,508 INFO L225 Difference]: With dead ends: 282 [2022-07-14 06:18:44,508 INFO L226 Difference]: Without dead ends: 282 [2022-07-14 06:18:44,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 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 06:18:44,508 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 157 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:18:44,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 517 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:18:44,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-07-14 06:18:44,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 268. [2022-07-14 06:18:44,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 172 states have (on average 1.5872093023255813) internal successors, (273), 246 states have internal predecessors, (273), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-14 06:18:44,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 309 transitions. [2022-07-14 06:18:44,517 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 309 transitions. Word has length 83 [2022-07-14 06:18:44,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:18:44,519 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 309 transitions. [2022-07-14 06:18:44,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:18:44,519 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 309 transitions. [2022-07-14 06:18:44,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-14 06:18:44,521 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:18:44,521 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:18:44,551 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 06:18:44,731 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,SelfDestructingSolverStorable12 [2022-07-14 06:18:44,731 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:18:44,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:18:44,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1937610553, now seen corresponding path program 1 times [2022-07-14 06:18:44,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:18:44,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743533987] [2022-07-14 06:18:44,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:44,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:18:44,747 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:18:44,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1497366465] [2022-07-14 06:18:44,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:44,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:18:44,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:18:44,755 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 06:18:44,756 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 06:18:44,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:18:44,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-14 06:18:44,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:18:44,917 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 10 treesize of output 9 [2022-07-14 06:18:44,928 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 06:18:46,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:18:46,053 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 20 treesize of output 22 [2022-07-14 06:18:46,073 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-14 06:18:46,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-14 06:18:46,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:18:46,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-14 06:18:46,362 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-14 06:18:46,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-14 06:18:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-14 06:18:47,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:18:47,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:18:47,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743533987] [2022-07-14 06:18:47,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:18:47,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497366465] [2022-07-14 06:18:47,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497366465] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:18:47,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:18:47,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-07-14 06:18:47,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686403655] [2022-07-14 06:18:47,503 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-14 06:18:47,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-14 06:18:47,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:18:47,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-14 06:18:47,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-07-14 06:18:47,504 INFO L87 Difference]: Start difference. First operand 268 states and 309 transitions. Second operand has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-14 06:18:48,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:18:48,173 INFO L93 Difference]: Finished difference Result 415 states and 499 transitions. [2022-07-14 06:18:48,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-14 06:18:48,174 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 83 [2022-07-14 06:18:48,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:18:48,175 INFO L225 Difference]: With dead ends: 415 [2022-07-14 06:18:48,175 INFO L226 Difference]: Without dead ends: 415 [2022-07-14 06:18:48,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-07-14 06:18:48,176 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 114 mSDsluCounter, 1589 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1780 SdHoareTripleChecker+Invalid, 2810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2581 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:18:48,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1780 Invalid, 2810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 218 Invalid, 0 Unknown, 2581 Unchecked, 0.2s Time] [2022-07-14 06:18:48,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-07-14 06:18:48,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 311. [2022-07-14 06:18:48,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 209 states have (on average 1.5119617224880382) internal successors, (316), 283 states have internal predecessors, (316), 22 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (39), 24 states have call predecessors, (39), 22 states have call successors, (39) [2022-07-14 06:18:48,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 377 transitions. [2022-07-14 06:18:48,185 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 377 transitions. Word has length 83 [2022-07-14 06:18:48,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:18:48,186 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 377 transitions. [2022-07-14 06:18:48,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-14 06:18:48,186 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 377 transitions. [2022-07-14 06:18:48,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-14 06:18:48,187 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:18:48,187 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:18:48,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-14 06:18:48,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-14 06:18:48,403 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:18:48,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:18:48,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1702611176, now seen corresponding path program 1 times [2022-07-14 06:18:48,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:18:48,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723902846] [2022-07-14 06:18:48,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:48,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:18:48,418 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:18:48,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1534418618] [2022-07-14 06:18:48,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:48,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:18:48,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:18:48,436 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:18:48,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-14 06:18:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:18:48,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-14 06:18:48,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:18:48,679 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 10 treesize of output 9 [2022-07-14 06:18:48,689 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 06:18:49,734 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-14 06:18:49,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-14 06:18:49,747 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 20 treesize of output 22 [2022-07-14 06:18:50,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:18:50,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-14 06:18:50,070 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-14 06:18:50,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-14 06:18:51,058 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 83 proven. 27 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-14 06:18:51,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:18:51,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:18:51,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723902846] [2022-07-14 06:18:51,339 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:18:51,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534418618] [2022-07-14 06:18:51,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534418618] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:18:51,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:18:51,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-07-14 06:18:51,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747994641] [2022-07-14 06:18:51,339 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-14 06:18:51,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-14 06:18:51,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:18:51,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-14 06:18:51,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-07-14 06:18:51,340 INFO L87 Difference]: Start difference. First operand 311 states and 377 transitions. Second operand has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-14 06:18:51,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:18:51,760 INFO L93 Difference]: Finished difference Result 517 states and 654 transitions. [2022-07-14 06:18:51,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-14 06:18:51,761 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 84 [2022-07-14 06:18:51,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:18:51,765 INFO L225 Difference]: With dead ends: 517 [2022-07-14 06:18:51,765 INFO L226 Difference]: Without dead ends: 517 [2022-07-14 06:18:51,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-07-14 06:18:51,766 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 170 mSDsluCounter, 2751 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 3012 SdHoareTripleChecker+Invalid, 5428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5192 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:18:51,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 3012 Invalid, 5428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 225 Invalid, 0 Unknown, 5192 Unchecked, 0.2s Time] [2022-07-14 06:18:51,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-07-14 06:18:51,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 318. [2022-07-14 06:18:51,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 215 states have (on average 1.5069767441860464) internal successors, (324), 290 states have internal predecessors, (324), 22 states have call successors, (22), 3 states have call predecessors, (22), 6 states have return successors, (55), 24 states have call predecessors, (55), 22 states have call successors, (55) [2022-07-14 06:18:51,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 401 transitions. [2022-07-14 06:18:51,778 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 401 transitions. Word has length 84 [2022-07-14 06:18:51,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:18:51,779 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 401 transitions. [2022-07-14 06:18:51,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-14 06:18:51,779 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 401 transitions. [2022-07-14 06:18:51,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-14 06:18:51,780 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:18:51,780 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:18:51,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-14 06:18:51,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:18:51,999 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:18:51,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:18:51,999 INFO L85 PathProgramCache]: Analyzing trace with hash 567625738, now seen corresponding path program 2 times [2022-07-14 06:18:51,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:18:51,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260575664] [2022-07-14 06:18:51,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:52,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:18:52,012 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:18:52,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [584078279] [2022-07-14 06:18:52,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:18:52,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:18:52,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:18:52,014 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:18:52,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-14 06:18:52,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:18:52,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:18:52,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-14 06:18:52,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:18:52,249 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 06:18:52,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-14 06:18:53,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:18:53,260 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 20 treesize of output 22 [2022-07-14 06:18:53,279 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-14 06:18:53,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-14 06:18:53,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:18:53,598 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 20 treesize of output 22 [2022-07-14 06:18:53,608 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:18:53,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-14 06:18:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 83 proven. 27 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-14 06:18:54,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:18:54,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:18:54,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260575664] [2022-07-14 06:18:54,915 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:18:54,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584078279] [2022-07-14 06:18:54,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584078279] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:18:54,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:18:54,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-07-14 06:18:54,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065482382] [2022-07-14 06:18:54,916 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-14 06:18:54,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-14 06:18:54,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:18:54,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-14 06:18:54,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2022-07-14 06:18:54,917 INFO L87 Difference]: Start difference. First operand 318 states and 401 transitions. Second operand has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:18:55,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:18:55,723 INFO L93 Difference]: Finished difference Result 483 states and 610 transitions. [2022-07-14 06:18:55,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-14 06:18:55,723 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 84 [2022-07-14 06:18:55,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:18:55,726 INFO L225 Difference]: With dead ends: 483 [2022-07-14 06:18:55,726 INFO L226 Difference]: Without dead ends: 483 [2022-07-14 06:18:55,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-07-14 06:18:55,727 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 114 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 2086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1856 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:18:55,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 923 Invalid, 2086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 219 Invalid, 0 Unknown, 1856 Unchecked, 0.2s Time] [2022-07-14 06:18:55,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-07-14 06:18:55,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 333. [2022-07-14 06:18:55,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 225 states have (on average 1.4844444444444445) internal successors, (334), 301 states have internal predecessors, (334), 26 states have call successors, (26), 3 states have call predecessors, (26), 7 states have return successors, (68), 28 states have call predecessors, (68), 26 states have call successors, (68) [2022-07-14 06:18:55,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 428 transitions. [2022-07-14 06:18:55,741 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 428 transitions. Word has length 84 [2022-07-14 06:18:55,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:18:55,741 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 428 transitions. [2022-07-14 06:18:55,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:18:55,741 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 428 transitions. [2022-07-14 06:18:55,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-14 06:18:55,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:18:55,742 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:18:55,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-14 06:18:55,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-14 06:18:55,955 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:18:55,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:18:55,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1414632217, now seen corresponding path program 3 times [2022-07-14 06:18:55,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:18:55,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862652131] [2022-07-14 06:18:55,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:55,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:18:55,968 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:18:55,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634269358] [2022-07-14 06:18:55,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:18:55,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:18:55,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:18:55,969 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:18:55,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-14 06:18:56,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-14 06:18:56,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:18:56,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-14 06:18:56,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:18:56,179 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-07-14 06:18:56,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:18:56,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:18:56,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862652131] [2022-07-14 06:18:56,180 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:18:56,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634269358] [2022-07-14 06:18:56,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634269358] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:18:56,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:18:56,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:18:56,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532308745] [2022-07-14 06:18:56,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:18:56,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:18:56,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:18:56,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:18:56,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:18:56,183 INFO L87 Difference]: Start difference. First operand 333 states and 428 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-14 06:18:56,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:18:56,224 INFO L93 Difference]: Finished difference Result 298 states and 356 transitions. [2022-07-14 06:18:56,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:18:56,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 85 [2022-07-14 06:18:56,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:18:56,226 INFO L225 Difference]: With dead ends: 298 [2022-07-14 06:18:56,226 INFO L226 Difference]: Without dead ends: 288 [2022-07-14 06:18:56,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:18:56,227 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 17 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:18:56,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 709 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:18:56,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-07-14 06:18:56,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 270. [2022-07-14 06:18:56,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 174 states have (on average 1.5804597701149425) internal successors, (275), 248 states have internal predecessors, (275), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-14 06:18:56,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 311 transitions. [2022-07-14 06:18:56,233 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 311 transitions. Word has length 85 [2022-07-14 06:18:56,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:18:56,233 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 311 transitions. [2022-07-14 06:18:56,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-14 06:18:56,234 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 311 transitions. [2022-07-14 06:18:56,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-14 06:18:56,234 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:18:56,234 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:18:56,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-14 06:18:56,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-14 06:18:56,460 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:18:56,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:18:56,460 INFO L85 PathProgramCache]: Analyzing trace with hash -560943855, now seen corresponding path program 4 times [2022-07-14 06:18:56,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:18:56,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307238084] [2022-07-14 06:18:56,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:56,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:18:56,473 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:18:56,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605274383] [2022-07-14 06:18:56,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:18:56,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:18:56,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:18:56,474 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:18:56,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-14 06:18:56,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:18:56,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:18:56,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-14 06:18:56,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:18:56,712 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 06:18:56,716 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 06:18:57,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:18:57,182 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 28 treesize of output 26 [2022-07-14 06:18:57,196 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-14 06:18:57,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-14 06:18:57,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:18:57,297 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 28 treesize of output 26 [2022-07-14 06:18:57,306 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:18:57,306 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 06:18:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 100 proven. 49 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-14 06:18:57,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:18:58,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:18:58,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307238084] [2022-07-14 06:18:58,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:18:58,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605274383] [2022-07-14 06:18:58,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605274383] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:18:58,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:18:58,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-07-14 06:18:58,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590455871] [2022-07-14 06:18:58,079 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-14 06:18:58,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-14 06:18:58,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:18:58,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-14 06:18:58,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2022-07-14 06:18:58,080 INFO L87 Difference]: Start difference. First operand 270 states and 311 transitions. Second operand has 18 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:18:58,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:18:58,475 INFO L93 Difference]: Finished difference Result 417 states and 501 transitions. [2022-07-14 06:18:58,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-14 06:18:58,475 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 89 [2022-07-14 06:18:58,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:18:58,477 INFO L225 Difference]: With dead ends: 417 [2022-07-14 06:18:58,477 INFO L226 Difference]: Without dead ends: 417 [2022-07-14 06:18:58,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2022-07-14 06:18:58,487 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 114 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 2323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2089 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:18:58,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1022 Invalid, 2323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 223 Invalid, 0 Unknown, 2089 Unchecked, 0.2s Time] [2022-07-14 06:18:58,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-07-14 06:18:58,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 313. [2022-07-14 06:18:58,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 211 states have (on average 1.5071090047393365) internal successors, (318), 285 states have internal predecessors, (318), 22 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (39), 24 states have call predecessors, (39), 22 states have call successors, (39) [2022-07-14 06:18:58,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 379 transitions. [2022-07-14 06:18:58,495 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 379 transitions. Word has length 89 [2022-07-14 06:18:58,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:18:58,495 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 379 transitions. [2022-07-14 06:18:58,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:18:58,495 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 379 transitions. [2022-07-14 06:18:58,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-14 06:18:58,496 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:18:58,496 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:18:58,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-14 06:18:58,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-14 06:18:58,710 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:18:58,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:18:58,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1182337176, now seen corresponding path program 5 times [2022-07-14 06:18:58,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:18:58,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807124044] [2022-07-14 06:18:58,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:58,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:18:58,726 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:18:58,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [93666708] [2022-07-14 06:18:58,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:18:58,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:18:58,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:18:58,744 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:18:58,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-14 06:18:58,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:18:58,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:18:58,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-14 06:18:58,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:18:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 111 proven. 1 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-14 06:18:58,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:18:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 11 proven. 47 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-07-14 06:18:59,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:18:59,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807124044] [2022-07-14 06:18:59,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:18:59,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93666708] [2022-07-14 06:18:59,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93666708] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:18:59,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:18:59,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-14 06:18:59,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233080370] [2022-07-14 06:18:59,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:18:59,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 06:18:59,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:18:59,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 06:18:59,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:18:59,162 INFO L87 Difference]: Start difference. First operand 313 states and 379 transitions. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-07-14 06:18:59,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:18:59,377 INFO L93 Difference]: Finished difference Result 302 states and 347 transitions. [2022-07-14 06:18:59,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 06:18:59,378 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 90 [2022-07-14 06:18:59,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:18:59,379 INFO L225 Difference]: With dead ends: 302 [2022-07-14 06:18:59,379 INFO L226 Difference]: Without dead ends: 287 [2022-07-14 06:18:59,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2022-07-14 06:18:59,380 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 60 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:18:59,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 1180 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:18:59,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-07-14 06:18:59,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2022-07-14 06:18:59,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 190 states have (on average 1.5473684210526315) internal successors, (294), 264 states have internal predecessors, (294), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-14 06:18:59,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 330 transitions. [2022-07-14 06:18:59,386 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 330 transitions. Word has length 90 [2022-07-14 06:18:59,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:18:59,386 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 330 transitions. [2022-07-14 06:18:59,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-07-14 06:18:59,386 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 330 transitions. [2022-07-14 06:18:59,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-14 06:18:59,387 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:18:59,387 INFO L195 NwaCegarLoop]: trace histogram [22, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:18:59,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-14 06:18:59,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:18:59,603 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:18:59,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:18:59,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1234441241, now seen corresponding path program 6 times [2022-07-14 06:18:59,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:18:59,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547091542] [2022-07-14 06:18:59,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:18:59,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:18:59,622 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:18:59,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276976773] [2022-07-14 06:18:59,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:18:59,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:18:59,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:18:59,623 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:18:59,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-14 06:19:01,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-14 06:19:01,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:19:01,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-14 06:19:01,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:19:01,693 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 110 proven. 3 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-07-14 06:19:01,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:19:01,874 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 110 proven. 3 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-07-14 06:19:01,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:19:01,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547091542] [2022-07-14 06:19:01,875 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:19:01,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276976773] [2022-07-14 06:19:01,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276976773] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:19:01,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:19:01,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-07-14 06:19:01,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618031159] [2022-07-14 06:19:01,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:19:01,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 06:19:01,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:19:01,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 06:19:01,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:19:01,878 INFO L87 Difference]: Start difference. First operand 287 states and 330 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-14 06:19:02,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:19:02,121 INFO L93 Difference]: Finished difference Result 301 states and 346 transitions. [2022-07-14 06:19:02,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 06:19:02,128 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 105 [2022-07-14 06:19:02,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:19:02,130 INFO L225 Difference]: With dead ends: 301 [2022-07-14 06:19:02,130 INFO L226 Difference]: Without dead ends: 291 [2022-07-14 06:19:02,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2022-07-14 06:19:02,130 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 72 mSDsluCounter, 1409 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:19:02,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1649 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:19:02,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-07-14 06:19:02,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2022-07-14 06:19:02,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 194 states have (on average 1.5257731958762886) internal successors, (296), 268 states have internal predecessors, (296), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-14 06:19:02,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 332 transitions. [2022-07-14 06:19:02,137 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 332 transitions. Word has length 105 [2022-07-14 06:19:02,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:19:02,138 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 332 transitions. [2022-07-14 06:19:02,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-14 06:19:02,138 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 332 transitions. [2022-07-14 06:19:02,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-14 06:19:02,142 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:19:02,142 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:19:02,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-14 06:19:02,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:19:02,354 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:19:02,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:19:02,355 INFO L85 PathProgramCache]: Analyzing trace with hash 927290713, now seen corresponding path program 7 times [2022-07-14 06:19:02,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:19:02,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50481770] [2022-07-14 06:19:02,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:02,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:19:02,383 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:19:02,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522336054] [2022-07-14 06:19:02,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:19:02,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:19:02,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:19:02,384 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:19:02,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-14 06:19:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:19:03,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-14 06:19:03,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:19:03,695 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 06:19:04,029 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-14 06:19:04,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-14 06:19:04,034 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 12 treesize of output 14 [2022-07-14 06:19:04,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:19:04,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-14 06:19:04,178 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-14 06:19:04,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-14 06:19:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 326 proven. 116 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-07-14 06:19:04,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:19:04,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:19:04,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50481770] [2022-07-14 06:19:04,353 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:19:04,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522336054] [2022-07-14 06:19:04,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522336054] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:19:04,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:19:04,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-07-14 06:19:04,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808124935] [2022-07-14 06:19:04,353 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-14 06:19:04,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-14 06:19:04,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:19:04,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-14 06:19:04,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-07-14 06:19:04,354 INFO L87 Difference]: Start difference. First operand 291 states and 332 transitions. Second operand has 19 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-14 06:19:05,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:19:05,606 INFO L93 Difference]: Finished difference Result 516 states and 602 transitions. [2022-07-14 06:19:05,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 06:19:05,607 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 109 [2022-07-14 06:19:05,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:19:05,608 INFO L225 Difference]: With dead ends: 516 [2022-07-14 06:19:05,608 INFO L226 Difference]: Without dead ends: 516 [2022-07-14 06:19:05,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-07-14 06:19:05,609 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 292 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 1829 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 2583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 713 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:19:05,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 793 Invalid, 2583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1829 Invalid, 0 Unknown, 713 Unchecked, 1.1s Time] [2022-07-14 06:19:05,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-07-14 06:19:05,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 299. [2022-07-14 06:19:05,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 202 states have (on average 1.5198019801980198) internal successors, (307), 276 states have internal predecessors, (307), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-14 06:19:05,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 343 transitions. [2022-07-14 06:19:05,614 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 343 transitions. Word has length 109 [2022-07-14 06:19:05,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:19:05,614 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 343 transitions. [2022-07-14 06:19:05,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-14 06:19:05,615 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 343 transitions. [2022-07-14 06:19:05,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-14 06:19:05,617 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:19:05,617 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:19:05,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-14 06:19:05,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-14 06:19:05,835 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:19:05,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:19:05,836 INFO L85 PathProgramCache]: Analyzing trace with hash 2068145114, now seen corresponding path program 1 times [2022-07-14 06:19:05,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:19:05,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876309613] [2022-07-14 06:19:05,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:05,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:19:05,859 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:19:05,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325468175] [2022-07-14 06:19:05,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:05,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:19:05,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:19:05,861 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:19:05,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-14 06:19:06,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:19:06,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 06:19:06,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:19:06,133 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-14 06:19:06,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:19:06,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:19:06,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876309613] [2022-07-14 06:19:06,134 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:19:06,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325468175] [2022-07-14 06:19:06,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325468175] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:19:06,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:19:06,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:19:06,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178547873] [2022-07-14 06:19:06,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:19:06,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:19:06,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:19:06,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:19:06,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:19:06,135 INFO L87 Difference]: Start difference. First operand 299 states and 343 transitions. Second operand has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-14 06:19:06,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:19:06,245 INFO L93 Difference]: Finished difference Result 304 states and 351 transitions. [2022-07-14 06:19:06,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:19:06,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 111 [2022-07-14 06:19:06,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:19:06,247 INFO L225 Difference]: With dead ends: 304 [2022-07-14 06:19:06,248 INFO L226 Difference]: Without dead ends: 304 [2022-07-14 06:19:06,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 109 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 06:19:06,248 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 76 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:19:06,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 358 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:19:06,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-07-14 06:19:06,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 298. [2022-07-14 06:19:06,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 202 states have (on average 1.5148514851485149) internal successors, (306), 275 states have internal predecessors, (306), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-14 06:19:06,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 342 transitions. [2022-07-14 06:19:06,253 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 342 transitions. Word has length 111 [2022-07-14 06:19:06,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:19:06,253 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 342 transitions. [2022-07-14 06:19:06,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-14 06:19:06,254 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 342 transitions. [2022-07-14 06:19:06,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-14 06:19:06,254 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:19:06,254 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:19:06,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-14 06:19:06,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-14 06:19:06,479 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:19:06,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:19:06,480 INFO L85 PathProgramCache]: Analyzing trace with hash -807331391, now seen corresponding path program 1 times [2022-07-14 06:19:06,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:19:06,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771435703] [2022-07-14 06:19:06,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:06,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:19:06,503 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:19:06,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889096835] [2022-07-14 06:19:06,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:06,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:19:06,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:19:06,505 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:19:06,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-14 06:19:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:19:06,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-14 06:19:06,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:19:06,930 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-14 06:19:06,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-14 06:19:07,001 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-14 06:19:07,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-14 06:19:07,114 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:19:07,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-14 06:19:07,283 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:19:07,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-14 06:19:07,343 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 328 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-07-14 06:19:07,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:19:07,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:19:07,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771435703] [2022-07-14 06:19:07,864 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:19:07,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889096835] [2022-07-14 06:19:07,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889096835] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:19:07,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:19:07,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-07-14 06:19:07,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43647493] [2022-07-14 06:19:07,864 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-14 06:19:07,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-14 06:19:07,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:19:07,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-14 06:19:07,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-07-14 06:19:07,865 INFO L87 Difference]: Start difference. First operand 298 states and 342 transitions. Second operand has 21 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 17 states have internal predecessors, (74), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-14 06:19:12,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:19:12,484 INFO L93 Difference]: Finished difference Result 421 states and 488 transitions. [2022-07-14 06:19:12,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-14 06:19:12,484 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 17 states have internal predecessors, (74), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 115 [2022-07-14 06:19:12,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:19:12,486 INFO L225 Difference]: With dead ends: 421 [2022-07-14 06:19:12,486 INFO L226 Difference]: Without dead ends: 421 [2022-07-14 06:19:12,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 134 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2022-07-14 06:19:12,487 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 206 mSDsluCounter, 2438 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 2657 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 661 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:19:12,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 2657 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 814 Invalid, 0 Unknown, 661 Unchecked, 0.3s Time] [2022-07-14 06:19:12,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-07-14 06:19:12,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 411. [2022-07-14 06:19:12,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 302 states have (on average 1.403973509933775) internal successors, (424), 374 states have internal predecessors, (424), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-14 06:19:12,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 482 transitions. [2022-07-14 06:19:12,494 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 482 transitions. Word has length 115 [2022-07-14 06:19:12,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:19:12,495 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 482 transitions. [2022-07-14 06:19:12,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 17 states have internal predecessors, (74), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-14 06:19:12,495 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 482 transitions. [2022-07-14 06:19:12,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-14 06:19:12,496 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:19:12,496 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:19:12,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-14 06:19:12,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:19:12,715 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:19:12,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:19:12,716 INFO L85 PathProgramCache]: Analyzing trace with hash -807331390, now seen corresponding path program 1 times [2022-07-14 06:19:12,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:19:12,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455830992] [2022-07-14 06:19:12,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:12,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:19:12,738 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:19:12,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688365868] [2022-07-14 06:19:12,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:12,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:19:12,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:19:12,740 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:19:12,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-14 06:19:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:19:17,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 140 conjunts are in the unsatisfiable core [2022-07-14 06:19:17,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:19:17,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-07-14 06:19:17,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-14 06:19:18,342 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:19:18,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-07-14 06:19:18,397 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-14 06:19:18,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-14 06:19:18,898 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:19:18,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-07-14 06:19:18,962 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-14 06:19:18,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-14 06:19:19,317 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:19:19,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-07-14 06:19:19,381 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-14 06:19:19,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-07-14 06:19:19,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:19:19,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-14 06:19:19,894 INFO L356 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-07-14 06:19:19,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2022-07-14 06:19:20,140 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 215 proven. 295 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-07-14 06:19:20,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:19:20,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:19:20,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455830992] [2022-07-14 06:19:20,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:19:20,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688365868] [2022-07-14 06:19:20,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688365868] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:19:20,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:19:20,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-07-14 06:19:20,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536472202] [2022-07-14 06:19:20,337 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-14 06:19:20,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-14 06:19:20,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:19:20,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-14 06:19:20,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2022-07-14 06:19:20,338 INFO L87 Difference]: Start difference. First operand 411 states and 482 transitions. Second operand has 29 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 24 states have internal predecessors, (75), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-14 06:19:22,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:19:22,600 INFO L93 Difference]: Finished difference Result 521 states and 612 transitions. [2022-07-14 06:19:22,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-14 06:19:22,602 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 24 states have internal predecessors, (75), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 115 [2022-07-14 06:19:22,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:19:22,604 INFO L225 Difference]: With dead ends: 521 [2022-07-14 06:19:22,604 INFO L226 Difference]: Without dead ends: 521 [2022-07-14 06:19:22,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2022-07-14 06:19:22,605 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 112 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1679 SdHoareTripleChecker+Invalid, 4077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2868 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-14 06:19:22,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 1679 Invalid, 4077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1197 Invalid, 0 Unknown, 2868 Unchecked, 1.7s Time] [2022-07-14 06:19:22,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-07-14 06:19:22,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 418. [2022-07-14 06:19:22,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 309 states have (on average 1.3980582524271845) internal successors, (432), 381 states have internal predecessors, (432), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-14 06:19:22,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 490 transitions. [2022-07-14 06:19:22,612 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 490 transitions. Word has length 115 [2022-07-14 06:19:22,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:19:22,612 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 490 transitions. [2022-07-14 06:19:22,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 24 states have internal predecessors, (75), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-14 06:19:22,613 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 490 transitions. [2022-07-14 06:19:22,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-14 06:19:22,614 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:19:22,614 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:19:22,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-14 06:19:22,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:19:22,828 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:19:22,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:19:22,828 INFO L85 PathProgramCache]: Analyzing trace with hash 742530710, now seen corresponding path program 1 times [2022-07-14 06:19:22,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:19:22,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795673216] [2022-07-14 06:19:22,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:22,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:19:22,850 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:19:22,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [931707040] [2022-07-14 06:19:22,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:22,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:19:22,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:19:22,852 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:19:22,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-14 06:19:23,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:19:23,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 06:19:23,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:19:23,206 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-14 06:19:23,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:19:23,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:19:23,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795673216] [2022-07-14 06:19:23,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:19:23,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931707040] [2022-07-14 06:19:23,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931707040] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:19:23,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:19:23,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:19:23,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631401901] [2022-07-14 06:19:23,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:19:23,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:19:23,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:19:23,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:19:23,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:19:23,208 INFO L87 Difference]: Start difference. First operand 418 states and 490 transitions. Second operand has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:19:23,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:19:23,322 INFO L93 Difference]: Finished difference Result 426 states and 501 transitions. [2022-07-14 06:19:23,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:19:23,326 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 116 [2022-07-14 06:19:23,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:19:23,327 INFO L225 Difference]: With dead ends: 426 [2022-07-14 06:19:23,327 INFO L226 Difference]: Without dead ends: 426 [2022-07-14 06:19:23,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 114 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 06:19:23,328 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 130 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:19:23,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 514 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:19:23,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-07-14 06:19:23,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 417. [2022-07-14 06:19:23,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 309 states have (on average 1.3948220064724919) internal successors, (431), 380 states have internal predecessors, (431), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-14 06:19:23,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 489 transitions. [2022-07-14 06:19:23,335 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 489 transitions. Word has length 116 [2022-07-14 06:19:23,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:19:23,336 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 489 transitions. [2022-07-14 06:19:23,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:19:23,336 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 489 transitions. [2022-07-14 06:19:23,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-14 06:19:23,337 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:19:23,337 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:19:23,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-14 06:19:23,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-14 06:19:23,560 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:19:23,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:19:23,560 INFO L85 PathProgramCache]: Analyzing trace with hash 742530711, now seen corresponding path program 1 times [2022-07-14 06:19:23,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:19:23,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272941834] [2022-07-14 06:19:23,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:23,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:19:23,584 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:19:23,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862564590] [2022-07-14 06:19:23,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:23,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:19:23,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:19:23,585 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:19:23,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-14 06:19:23,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:19:23,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-14 06:19:23,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:19:24,042 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 64 proven. 106 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-07-14 06:19:24,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:19:24,094 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:19:24,095 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 20 treesize of output 24 [2022-07-14 06:19:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 64 proven. 106 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-07-14 06:19:24,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:19:24,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272941834] [2022-07-14 06:19:24,341 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:19:24,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862564590] [2022-07-14 06:19:24,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862564590] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:19:24,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:19:24,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-07-14 06:19:24,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917907995] [2022-07-14 06:19:24,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:19:24,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-14 06:19:24,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:19:24,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-14 06:19:24,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-07-14 06:19:24,342 INFO L87 Difference]: Start difference. First operand 417 states and 489 transitions. Second operand has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-14 06:19:24,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:19:24,594 INFO L93 Difference]: Finished difference Result 425 states and 500 transitions. [2022-07-14 06:19:24,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:19:24,600 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 116 [2022-07-14 06:19:24,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:19:24,601 INFO L225 Difference]: With dead ends: 425 [2022-07-14 06:19:24,601 INFO L226 Difference]: Without dead ends: 425 [2022-07-14 06:19:24,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-07-14 06:19:24,602 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 340 mSDsluCounter, 2026 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 2244 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:19:24,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 2244 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:19:24,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-07-14 06:19:24,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 416. [2022-07-14 06:19:24,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 309 states have (on average 1.3915857605177993) internal successors, (430), 379 states have internal predecessors, (430), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-14 06:19:24,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 488 transitions. [2022-07-14 06:19:24,613 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 488 transitions. Word has length 116 [2022-07-14 06:19:24,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:19:24,613 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 488 transitions. [2022-07-14 06:19:24,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-14 06:19:24,614 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 488 transitions. [2022-07-14 06:19:24,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-14 06:19:24,614 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:19:24,614 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:19:24,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-14 06:19:24,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-14 06:19:24,824 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:19:24,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:19:24,825 INFO L85 PathProgramCache]: Analyzing trace with hash 607443032, now seen corresponding path program 1 times [2022-07-14 06:19:24,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:19:24,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377103403] [2022-07-14 06:19:24,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:24,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:19:24,852 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:19:24,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546554011] [2022-07-14 06:19:24,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:24,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:19:24,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:19:24,854 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:19:24,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-14 06:19:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:19:25,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 06:19:25,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:19:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-14 06:19:25,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:19:25,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:19:25,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377103403] [2022-07-14 06:19:25,229 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:19:25,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546554011] [2022-07-14 06:19:25,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546554011] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:19:25,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:19:25,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:19:25,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984800646] [2022-07-14 06:19:25,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:19:25,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:19:25,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:19:25,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:19:25,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:19:25,230 INFO L87 Difference]: Start difference. First operand 416 states and 488 transitions. Second operand has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-14 06:19:25,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:19:25,367 INFO L93 Difference]: Finished difference Result 419 states and 493 transitions. [2022-07-14 06:19:25,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:19:25,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 118 [2022-07-14 06:19:25,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:19:25,369 INFO L225 Difference]: With dead ends: 419 [2022-07-14 06:19:25,370 INFO L226 Difference]: Without dead ends: 419 [2022-07-14 06:19:25,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 116 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 06:19:25,370 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 60 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:19:25,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 364 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:19:25,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-07-14 06:19:25,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 415. [2022-07-14 06:19:25,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 309 states have (on average 1.3883495145631068) internal successors, (429), 378 states have internal predecessors, (429), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-14 06:19:25,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 487 transitions. [2022-07-14 06:19:25,379 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 487 transitions. Word has length 118 [2022-07-14 06:19:25,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:19:25,379 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 487 transitions. [2022-07-14 06:19:25,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-14 06:19:25,380 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 487 transitions. [2022-07-14 06:19:25,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-14 06:19:25,380 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:19:25,381 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:19:25,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-07-14 06:19:25,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-14 06:19:25,595 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:19:25,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:19:25,596 INFO L85 PathProgramCache]: Analyzing trace with hash -755993409, now seen corresponding path program 1 times [2022-07-14 06:19:25,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:19:25,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438443726] [2022-07-14 06:19:25,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:25,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:19:25,641 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:19:25,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274838985] [2022-07-14 06:19:25,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:25,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:19:25,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:19:25,649 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:19:25,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-14 06:19:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:19:26,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-14 06:19:26,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:19:26,189 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-14 06:19:26,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-14 06:19:26,289 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-14 06:19:26,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-07-14 06:19:26,430 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-07-14 06:19:26,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-07-14 06:19:26,592 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-07-14 06:19:26,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 38 [2022-07-14 06:19:26,794 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-07-14 06:19:26,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 44 [2022-07-14 06:19:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 5 proven. 498 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-14 06:19:27,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:19:27,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:19:27,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438443726] [2022-07-14 06:19:27,254 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:19:27,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274838985] [2022-07-14 06:19:27,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274838985] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:19:27,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:19:27,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-07-14 06:19:27,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208542585] [2022-07-14 06:19:27,255 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-14 06:19:27,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-14 06:19:27,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:19:27,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-14 06:19:27,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-07-14 06:19:27,256 INFO L87 Difference]: Start difference. First operand 415 states and 487 transitions. Second operand has 26 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 21 states have internal predecessors, (81), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-14 06:19:31,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:19:31,753 INFO L93 Difference]: Finished difference Result 665 states and 794 transitions. [2022-07-14 06:19:31,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-14 06:19:31,753 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 21 states have internal predecessors, (81), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 122 [2022-07-14 06:19:31,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:19:31,755 INFO L225 Difference]: With dead ends: 665 [2022-07-14 06:19:31,755 INFO L226 Difference]: Without dead ends: 665 [2022-07-14 06:19:31,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 116 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=174, Invalid=1230, Unknown=2, NotChecked=0, Total=1406 [2022-07-14 06:19:31,756 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 137 mSDsluCounter, 3003 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 3219 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 658 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:19:31,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 3219 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 550 Invalid, 0 Unknown, 658 Unchecked, 0.2s Time] [2022-07-14 06:19:31,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-07-14 06:19:31,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 660. [2022-07-14 06:19:31,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 525 states have (on average 1.3085714285714285) internal successors, (687), 594 states have internal predecessors, (687), 52 states have call successors, (52), 13 states have call predecessors, (52), 13 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-07-14 06:19:31,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 791 transitions. [2022-07-14 06:19:31,787 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 791 transitions. Word has length 122 [2022-07-14 06:19:31,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:19:31,788 INFO L495 AbstractCegarLoop]: Abstraction has 660 states and 791 transitions. [2022-07-14 06:19:31,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 21 states have internal predecessors, (81), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-14 06:19:31,788 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 791 transitions. [2022-07-14 06:19:31,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-14 06:19:31,789 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:19:31,789 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:19:31,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-14 06:19:32,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-14 06:19:32,004 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:19:32,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:19:32,004 INFO L85 PathProgramCache]: Analyzing trace with hash -755993408, now seen corresponding path program 1 times [2022-07-14 06:19:32,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:19:32,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231638598] [2022-07-14 06:19:32,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:32,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:19:32,034 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:19:32,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [737267014] [2022-07-14 06:19:32,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:32,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:19:32,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:19:32,037 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:19:32,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-14 06:19:32,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:19:32,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 168 conjunts are in the unsatisfiable core [2022-07-14 06:19:32,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:19:32,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-14 06:19:33,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-07-14 06:19:34,067 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:19:34,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-07-14 06:19:34,142 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-14 06:19:34,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-14 06:19:34,513 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:19:34,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-07-14 06:19:34,573 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-14 06:19:34,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-07-14 06:19:34,933 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:19:34,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-07-14 06:19:35,006 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-07-14 06:19:35,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 45 [2022-07-14 06:19:35,571 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-07-14 06:19:35,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 32 treesize of output 57 [2022-07-14 06:19:35,594 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 21 treesize of output 21 [2022-07-14 06:19:37,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:19:37,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-14 06:19:37,657 INFO L356 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2022-07-14 06:19:37,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 39 [2022-07-14 06:19:37,961 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 20 proven. 342 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2022-07-14 06:19:37,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:19:38,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:19:38,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231638598] [2022-07-14 06:19:38,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:19:38,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737267014] [2022-07-14 06:19:38,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737267014] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:19:38,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:19:38,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-07-14 06:19:38,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696635283] [2022-07-14 06:19:38,218 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-14 06:19:38,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-14 06:19:38,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:19:38,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-14 06:19:38,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=799, Unknown=1, NotChecked=0, Total=930 [2022-07-14 06:19:38,220 INFO L87 Difference]: Start difference. First operand 660 states and 791 transitions. Second operand has 29 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-14 06:19:40,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:19:40,593 INFO L93 Difference]: Finished difference Result 785 states and 937 transitions. [2022-07-14 06:19:40,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-14 06:19:40,595 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 122 [2022-07-14 06:19:40,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:19:40,599 INFO L225 Difference]: With dead ends: 785 [2022-07-14 06:19:40,600 INFO L226 Difference]: Without dead ends: 785 [2022-07-14 06:19:40,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 114 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=170, Invalid=1235, Unknown=1, NotChecked=0, Total=1406 [2022-07-14 06:19:40,601 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 115 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 2178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1110 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-14 06:19:40,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 788 Invalid, 2178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1055 Invalid, 0 Unknown, 1110 Unchecked, 1.8s Time] [2022-07-14 06:19:40,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-07-14 06:19:40,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 667. [2022-07-14 06:19:40,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 532 states have (on average 1.306390977443609) internal successors, (695), 601 states have internal predecessors, (695), 52 states have call successors, (52), 13 states have call predecessors, (52), 13 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-07-14 06:19:40,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 799 transitions. [2022-07-14 06:19:40,613 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 799 transitions. Word has length 122 [2022-07-14 06:19:40,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:19:40,613 INFO L495 AbstractCegarLoop]: Abstraction has 667 states and 799 transitions. [2022-07-14 06:19:40,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-14 06:19:40,613 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 799 transitions. [2022-07-14 06:19:40,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-14 06:19:40,614 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:19:40,614 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:19:40,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-14 06:19:40,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-14 06:19:40,827 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:19:40,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:19:40,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1960959122, now seen corresponding path program 1 times [2022-07-14 06:19:40,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:19:40,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695966908] [2022-07-14 06:19:40,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:40,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:19:40,856 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:19:40,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [336961503] [2022-07-14 06:19:40,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:40,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:19:40,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:19:40,872 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:19:40,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-14 06:19:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:19:41,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 06:19:41,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:19:41,307 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-14 06:19:41,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:19:41,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:19:41,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695966908] [2022-07-14 06:19:41,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:19:41,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336961503] [2022-07-14 06:19:41,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336961503] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:19:41,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:19:41,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:19:41,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081650599] [2022-07-14 06:19:41,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:19:41,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:19:41,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:19:41,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:19:41,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:19:41,308 INFO L87 Difference]: Start difference. First operand 667 states and 799 transitions. Second operand has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:19:41,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:19:41,418 INFO L93 Difference]: Finished difference Result 670 states and 803 transitions. [2022-07-14 06:19:41,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:19:41,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 123 [2022-07-14 06:19:41,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:19:41,421 INFO L225 Difference]: With dead ends: 670 [2022-07-14 06:19:41,421 INFO L226 Difference]: Without dead ends: 670 [2022-07-14 06:19:41,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 121 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 06:19:41,422 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 102 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:19:41,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 511 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:19:41,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-07-14 06:19:41,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 666. [2022-07-14 06:19:41,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 532 states have (on average 1.3045112781954886) internal successors, (694), 600 states have internal predecessors, (694), 52 states have call successors, (52), 13 states have call predecessors, (52), 13 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-07-14 06:19:41,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 798 transitions. [2022-07-14 06:19:41,434 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 798 transitions. Word has length 123 [2022-07-14 06:19:41,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:19:41,434 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 798 transitions. [2022-07-14 06:19:41,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:19:41,434 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 798 transitions. [2022-07-14 06:19:41,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-14 06:19:41,435 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:19:41,435 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:19:41,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-14 06:19:41,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:19:41,651 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:19:41,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:19:41,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1960959121, now seen corresponding path program 1 times [2022-07-14 06:19:41,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:19:41,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897817134] [2022-07-14 06:19:41,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:41,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:19:41,674 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:19:41,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1806806444] [2022-07-14 06:19:41,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:41,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:19:41,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:19:41,675 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:19:41,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-14 06:19:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:19:42,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 144 conjunts are in the unsatisfiable core [2022-07-14 06:19:42,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:19:42,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-07-14 06:19:42,669 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 06:19:42,968 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-14 06:19:42,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-14 06:19:42,972 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 12 treesize of output 14 [2022-07-14 06:19:43,295 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-14 06:19:43,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-14 06:19:43,303 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 12 treesize of output 14 [2022-07-14 06:19:43,639 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:19:43,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-14 06:19:43,667 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-14 06:19:43,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-07-14 06:19:43,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:19:43,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-14 06:19:43,877 INFO L356 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-07-14 06:19:43,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2022-07-14 06:19:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 242 proven. 300 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-07-14 06:19:43,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:19:44,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:19:44,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897817134] [2022-07-14 06:19:44,176 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:19:44,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806806444] [2022-07-14 06:19:44,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806806444] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:19:44,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:19:44,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2022-07-14 06:19:44,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477105851] [2022-07-14 06:19:44,176 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-14 06:19:44,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-14 06:19:44,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:19:44,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-14 06:19:44,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2022-07-14 06:19:44,177 INFO L87 Difference]: Start difference. First operand 666 states and 798 transitions. Second operand has 34 states, 31 states have (on average 2.967741935483871) internal successors, (92), 29 states have internal predecessors, (92), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-14 06:19:45,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:19:45,870 INFO L93 Difference]: Finished difference Result 868 states and 1043 transitions. [2022-07-14 06:19:45,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-14 06:19:45,871 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 2.967741935483871) internal successors, (92), 29 states have internal predecessors, (92), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 123 [2022-07-14 06:19:45,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:19:45,874 INFO L225 Difference]: With dead ends: 868 [2022-07-14 06:19:45,874 INFO L226 Difference]: Without dead ends: 868 [2022-07-14 06:19:45,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=198, Invalid=1608, Unknown=0, NotChecked=0, Total=1806 [2022-07-14 06:19:45,875 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 189 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 2272 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 3090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 781 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:19:45,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 762 Invalid, 3090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2272 Invalid, 0 Unknown, 781 Unchecked, 1.4s Time] [2022-07-14 06:19:45,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-07-14 06:19:45,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 674. [2022-07-14 06:19:45,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 540 states have (on average 1.3055555555555556) internal successors, (705), 608 states have internal predecessors, (705), 52 states have call successors, (52), 13 states have call predecessors, (52), 13 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-07-14 06:19:45,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 809 transitions. [2022-07-14 06:19:45,886 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 809 transitions. Word has length 123 [2022-07-14 06:19:45,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:19:45,887 INFO L495 AbstractCegarLoop]: Abstraction has 674 states and 809 transitions. [2022-07-14 06:19:45,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 2.967741935483871) internal successors, (92), 29 states have internal predecessors, (92), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-14 06:19:45,887 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 809 transitions. [2022-07-14 06:19:45,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-14 06:19:45,888 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:19:45,888 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:19:45,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-14 06:19:46,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-14 06:19:46,095 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:19:46,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:19:46,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1008929263, now seen corresponding path program 1 times [2022-07-14 06:19:46,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:19:46,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169625948] [2022-07-14 06:19:46,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:46,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:19:46,122 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:19:46,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069756487] [2022-07-14 06:19:46,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:46,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:19:46,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:19:46,140 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:19:46,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-14 06:19:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:19:46,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 06:19:46,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:19:46,575 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-14 06:19:46,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:19:46,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:19:46,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169625948] [2022-07-14 06:19:46,576 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:19:46,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069756487] [2022-07-14 06:19:46,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069756487] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:19:46,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:19:46,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:19:46,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191387974] [2022-07-14 06:19:46,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:19:46,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:19:46,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:19:46,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:19:46,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:19:46,578 INFO L87 Difference]: Start difference. First operand 674 states and 809 transitions. Second operand has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-14 06:19:46,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:19:46,673 INFO L93 Difference]: Finished difference Result 675 states and 811 transitions. [2022-07-14 06:19:46,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:19:46,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 125 [2022-07-14 06:19:46,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:19:46,675 INFO L225 Difference]: With dead ends: 675 [2022-07-14 06:19:46,675 INFO L226 Difference]: Without dead ends: 675 [2022-07-14 06:19:46,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 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 06:19:46,676 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 25 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:19:46,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 386 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:19:46,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-07-14 06:19:46,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 673. [2022-07-14 06:19:46,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 540 states have (on average 1.3037037037037038) internal successors, (704), 607 states have internal predecessors, (704), 52 states have call successors, (52), 13 states have call predecessors, (52), 13 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-07-14 06:19:46,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 808 transitions. [2022-07-14 06:19:46,705 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 808 transitions. Word has length 125 [2022-07-14 06:19:46,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:19:46,706 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 808 transitions. [2022-07-14 06:19:46,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-14 06:19:46,706 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 808 transitions. [2022-07-14 06:19:46,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-14 06:19:46,706 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:19:46,706 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:19:46,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-07-14 06:19:46,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:19:46,919 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:19:46,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:19:46,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1008929264, now seen corresponding path program 1 times [2022-07-14 06:19:46,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:19:46,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516168852] [2022-07-14 06:19:46,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:46,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:19:46,949 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:19:46,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1057394645] [2022-07-14 06:19:46,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:46,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:19:46,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:19:46,951 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:19:46,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-14 06:19:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:19:47,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 06:19:47,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:19:47,402 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-14 06:19:47,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:19:47,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:19:47,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516168852] [2022-07-14 06:19:47,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:19:47,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057394645] [2022-07-14 06:19:47,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057394645] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:19:47,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:19:47,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:19:47,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708246013] [2022-07-14 06:19:47,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:19:47,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:19:47,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:19:47,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:19:47,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:19:47,405 INFO L87 Difference]: Start difference. First operand 673 states and 808 transitions. Second operand has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-14 06:19:47,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:19:47,537 INFO L93 Difference]: Finished difference Result 674 states and 810 transitions. [2022-07-14 06:19:47,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:19:47,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 125 [2022-07-14 06:19:47,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:19:47,540 INFO L225 Difference]: With dead ends: 674 [2022-07-14 06:19:47,540 INFO L226 Difference]: Without dead ends: 674 [2022-07-14 06:19:47,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 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 06:19:47,541 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 46 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:19:47,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 369 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:19:47,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-07-14 06:19:47,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 672. [2022-07-14 06:19:47,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 540 states have (on average 1.3018518518518518) internal successors, (703), 606 states have internal predecessors, (703), 52 states have call successors, (52), 13 states have call predecessors, (52), 13 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-07-14 06:19:47,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 807 transitions. [2022-07-14 06:19:47,550 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 807 transitions. Word has length 125 [2022-07-14 06:19:47,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:19:47,550 INFO L495 AbstractCegarLoop]: Abstraction has 672 states and 807 transitions. [2022-07-14 06:19:47,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-14 06:19:47,551 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 807 transitions. [2022-07-14 06:19:47,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-14 06:19:47,551 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:19:47,552 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:19:47,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-14 06:19:47,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:19:47,775 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:19:47,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:19:47,776 INFO L85 PathProgramCache]: Analyzing trace with hash -20549672, now seen corresponding path program 1 times [2022-07-14 06:19:47,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:19:47,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312570389] [2022-07-14 06:19:47,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:47,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:19:47,820 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:19:47,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1589760143] [2022-07-14 06:19:47,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:47,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:19:47,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:19:47,836 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:19:47,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-14 06:19:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:19:48,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 133 conjunts are in the unsatisfiable core [2022-07-14 06:19:48,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:19:48,560 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-14 06:19:48,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-14 06:19:48,565 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 12 treesize of output 14 [2022-07-14 06:19:48,737 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:19:48,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-14 06:19:48,769 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-14 06:19:48,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-07-14 06:19:49,069 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:19:49,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-14 06:19:49,107 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-07-14 06:19:49,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 45 [2022-07-14 06:19:49,347 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:19:49,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-14 06:19:49,378 INFO L356 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-07-14 06:19:49,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 42 [2022-07-14 06:19:53,966 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:19:53,966 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-14 06:19:54,004 INFO L356 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-07-14 06:19:54,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 54 [2022-07-14 06:19:54,460 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:19:54,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 25 [2022-07-14 06:19:54,509 INFO L356 Elim1Store]: treesize reduction 4, result has 93.0 percent of original size [2022-07-14 06:19:54,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 38 treesize of output 80 [2022-07-14 06:19:55,076 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 32 proven. 466 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-07-14 06:19:55,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:19:55,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:19:55,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312570389] [2022-07-14 06:19:55,539 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:19:55,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589760143] [2022-07-14 06:19:55,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589760143] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:19:55,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:19:55,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2022-07-14 06:19:55,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586998735] [2022-07-14 06:19:55,539 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-14 06:19:55,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-14 06:19:55,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:19:55,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-14 06:19:55,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1598, Unknown=2, NotChecked=0, Total=1806 [2022-07-14 06:19:55,541 INFO L87 Difference]: Start difference. First operand 672 states and 807 transitions. Second operand has 38 states, 34 states have (on average 2.588235294117647) internal successors, (88), 30 states have internal predecessors, (88), 5 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-14 06:19:55,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:19:55,866 INFO L93 Difference]: Finished difference Result 780 states and 929 transitions. [2022-07-14 06:19:55,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-14 06:19:55,866 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 2.588235294117647) internal successors, (88), 30 states have internal predecessors, (88), 5 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 129 [2022-07-14 06:19:55,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:19:55,868 INFO L225 Difference]: With dead ends: 780 [2022-07-14 06:19:55,869 INFO L226 Difference]: Without dead ends: 780 [2022-07-14 06:19:55,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 112 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=238, Invalid=1922, Unknown=2, NotChecked=0, Total=2162 [2022-07-14 06:19:55,870 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 61 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1780 SdHoareTripleChecker+Invalid, 1931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1777 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:19:55,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 1780 Invalid, 1931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 149 Invalid, 0 Unknown, 1777 Unchecked, 0.2s Time] [2022-07-14 06:19:55,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-07-14 06:19:55,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 773. [2022-07-14 06:19:55,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 631 states have (on average 1.2725832012678289) internal successors, (803), 697 states have internal predecessors, (803), 58 states have call successors, (58), 17 states have call predecessors, (58), 17 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-07-14 06:19:55,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 919 transitions. [2022-07-14 06:19:55,880 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 919 transitions. Word has length 129 [2022-07-14 06:19:55,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:19:55,880 INFO L495 AbstractCegarLoop]: Abstraction has 773 states and 919 transitions. [2022-07-14 06:19:55,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 2.588235294117647) internal successors, (88), 30 states have internal predecessors, (88), 5 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-14 06:19:55,881 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 919 transitions. [2022-07-14 06:19:55,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-14 06:19:55,881 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:19:55,882 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:19:55,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-14 06:19:56,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-07-14 06:19:56,086 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:19:56,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:19:56,086 INFO L85 PathProgramCache]: Analyzing trace with hash -20549673, now seen corresponding path program 1 times [2022-07-14 06:19:56,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:19:56,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339394376] [2022-07-14 06:19:56,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:56,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:19:56,114 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:19:56,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [90819897] [2022-07-14 06:19:56,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:56,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:19:56,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:19:56,119 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:19:56,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-14 06:19:56,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:19:56,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-14 06:19:56,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:19:56,718 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:19:56,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-14 06:19:56,780 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:19:56,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-14 06:19:56,851 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:19:56,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-14 06:19:56,906 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:19:56,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-14 06:19:56,961 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:19:56,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-14 06:19:57,019 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:19:57,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-14 06:19:57,081 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-14 06:19:57,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:19:57,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:19:57,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339394376] [2022-07-14 06:19:57,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:19:57,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90819897] [2022-07-14 06:19:57,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90819897] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:19:57,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:19:57,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:19:57,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569277576] [2022-07-14 06:19:57,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:19:57,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:19:57,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:19:57,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:19:57,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:19:57,084 INFO L87 Difference]: Start difference. First operand 773 states and 919 transitions. Second operand has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-14 06:19:57,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:19:57,368 INFO L93 Difference]: Finished difference Result 1401 states and 1682 transitions. [2022-07-14 06:19:57,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:19:57,369 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 129 [2022-07-14 06:19:57,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:19:57,372 INFO L225 Difference]: With dead ends: 1401 [2022-07-14 06:19:57,372 INFO L226 Difference]: Without dead ends: 1401 [2022-07-14 06:19:57,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 112 SyntacticMatches, 11 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:19:57,373 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 162 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 258 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:19:57,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 974 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 370 Invalid, 0 Unknown, 258 Unchecked, 0.2s Time] [2022-07-14 06:19:57,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2022-07-14 06:19:57,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1251. [2022-07-14 06:19:57,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1056 states have (on average 1.2490530303030303) internal successors, (1319), 1122 states have internal predecessors, (1319), 99 states have call successors, (99), 29 states have call predecessors, (99), 29 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-07-14 06:19:57,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 1517 transitions. [2022-07-14 06:19:57,405 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 1517 transitions. Word has length 129 [2022-07-14 06:19:57,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:19:57,405 INFO L495 AbstractCegarLoop]: Abstraction has 1251 states and 1517 transitions. [2022-07-14 06:19:57,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-14 06:19:57,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 1517 transitions. [2022-07-14 06:19:57,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-14 06:19:57,406 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:19:57,407 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:19:57,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-14 06:19:57,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-14 06:19:57,619 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:19:57,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:19:57,620 INFO L85 PathProgramCache]: Analyzing trace with hash -637039764, now seen corresponding path program 1 times [2022-07-14 06:19:57,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:19:57,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452342920] [2022-07-14 06:19:57,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:57,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:19:57,642 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:19:57,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1923656128] [2022-07-14 06:19:57,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:57,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:19:57,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:19:57,643 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:19:57,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-14 06:19:58,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:19:58,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 06:19:58,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:19:58,128 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-14 06:19:58,128 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:19:58,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:19:58,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452342920] [2022-07-14 06:19:58,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:19:58,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923656128] [2022-07-14 06:19:58,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923656128] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:19:58,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:19:58,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:19:58,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147043023] [2022-07-14 06:19:58,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:19:58,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:19:58,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:19:58,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:19:58,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:19:58,129 INFO L87 Difference]: Start difference. First operand 1251 states and 1517 transitions. Second operand has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:19:58,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:19:58,226 INFO L93 Difference]: Finished difference Result 1250 states and 1515 transitions. [2022-07-14 06:19:58,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:19:58,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 130 [2022-07-14 06:19:58,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:19:58,229 INFO L225 Difference]: With dead ends: 1250 [2022-07-14 06:19:58,230 INFO L226 Difference]: Without dead ends: 1250 [2022-07-14 06:19:58,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 127 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 06:19:58,230 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 76 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:19:58,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 510 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:19:58,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2022-07-14 06:19:58,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1250. [2022-07-14 06:19:58,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1056 states have (on average 1.2471590909090908) internal successors, (1317), 1121 states have internal predecessors, (1317), 99 states have call successors, (99), 29 states have call predecessors, (99), 29 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-07-14 06:19:58,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1515 transitions. [2022-07-14 06:19:58,241 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1515 transitions. Word has length 130 [2022-07-14 06:19:58,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:19:58,242 INFO L495 AbstractCegarLoop]: Abstraction has 1250 states and 1515 transitions. [2022-07-14 06:19:58,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:19:58,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1515 transitions. [2022-07-14 06:19:58,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-14 06:19:58,243 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:19:58,243 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:19:58,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-14 06:19:58,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-14 06:19:58,459 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:19:58,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:19:58,460 INFO L85 PathProgramCache]: Analyzing trace with hash -637039763, now seen corresponding path program 1 times [2022-07-14 06:19:58,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:19:58,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100033922] [2022-07-14 06:19:58,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:58,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:19:58,485 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:19:58,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949365061] [2022-07-14 06:19:58,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:19:58,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:19:58,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:19:58,487 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:19:58,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-14 06:19:58,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:19:58,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-14 06:19:58,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:19:59,233 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-07-14 06:19:59,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:19:59,290 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:19:59,291 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 20 treesize of output 24 [2022-07-14 06:19:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-07-14 06:19:59,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:19:59,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100033922] [2022-07-14 06:19:59,688 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:19:59,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949365061] [2022-07-14 06:19:59,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949365061] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:19:59,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:19:59,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-07-14 06:19:59,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675510142] [2022-07-14 06:19:59,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:19:59,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-14 06:19:59,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:19:59,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-14 06:19:59,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-07-14 06:19:59,690 INFO L87 Difference]: Start difference. First operand 1250 states and 1515 transitions. Second operand has 18 states, 17 states have (on average 6.588235294117647) internal successors, (112), 16 states have internal predecessors, (112), 3 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-14 06:19:59,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:19:59,928 INFO L93 Difference]: Finished difference Result 1249 states and 1513 transitions. [2022-07-14 06:19:59,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:19:59,929 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 6.588235294117647) internal successors, (112), 16 states have internal predecessors, (112), 3 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 130 [2022-07-14 06:19:59,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:19:59,932 INFO L225 Difference]: With dead ends: 1249 [2022-07-14 06:19:59,932 INFO L226 Difference]: Without dead ends: 1249 [2022-07-14 06:19:59,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-07-14 06:19:59,933 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 290 mSDsluCounter, 1877 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 2092 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:19:59,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 2092 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:19:59,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2022-07-14 06:19:59,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1249. [2022-07-14 06:19:59,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1056 states have (on average 1.2452651515151516) internal successors, (1315), 1120 states have internal predecessors, (1315), 99 states have call successors, (99), 29 states have call predecessors, (99), 29 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-07-14 06:19:59,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1513 transitions. [2022-07-14 06:19:59,945 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1513 transitions. Word has length 130 [2022-07-14 06:19:59,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:19:59,945 INFO L495 AbstractCegarLoop]: Abstraction has 1249 states and 1513 transitions. [2022-07-14 06:19:59,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 6.588235294117647) internal successors, (112), 16 states have internal predecessors, (112), 3 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-14 06:19:59,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1513 transitions. [2022-07-14 06:19:59,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-14 06:19:59,946 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:19:59,946 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:19:59,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-14 06:20:00,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:20:00,159 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:20:00,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:20:00,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1985113390, now seen corresponding path program 1 times [2022-07-14 06:20:00,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:20:00,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452656182] [2022-07-14 06:20:00,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:20:00,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:20:00,192 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:20:00,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373821972] [2022-07-14 06:20:00,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:20:00,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:20:00,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:20:00,194 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:20:00,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-14 06:20:00,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:20:00,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 06:20:00,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:20:00,723 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-14 06:20:00,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:20:00,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:20:00,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452656182] [2022-07-14 06:20:00,723 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:20:00,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373821972] [2022-07-14 06:20:00,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373821972] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:20:00,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:20:00,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:20:00,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856854992] [2022-07-14 06:20:00,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:20:00,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:20:00,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:20:00,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:20:00,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:20:00,725 INFO L87 Difference]: Start difference. First operand 1249 states and 1513 transitions. Second operand has 3 states, 2 states have (on average 27.5) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-14 06:20:00,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:20:00,881 INFO L93 Difference]: Finished difference Result 1248 states and 1511 transitions. [2022-07-14 06:20:00,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:20:00,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 27.5) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 132 [2022-07-14 06:20:00,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:20:00,884 INFO L225 Difference]: With dead ends: 1248 [2022-07-14 06:20:00,884 INFO L226 Difference]: Without dead ends: 1248 [2022-07-14 06:20:00,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 130 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 06:20:00,884 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 31 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:20:00,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 375 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:20:00,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-07-14 06:20:00,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1248. [2022-07-14 06:20:00,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1056 states have (on average 1.2433712121212122) internal successors, (1313), 1119 states have internal predecessors, (1313), 99 states have call successors, (99), 29 states have call predecessors, (99), 29 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-07-14 06:20:00,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 1511 transitions. [2022-07-14 06:20:00,896 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 1511 transitions. Word has length 132 [2022-07-14 06:20:00,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:20:00,897 INFO L495 AbstractCegarLoop]: Abstraction has 1248 states and 1511 transitions. [2022-07-14 06:20:00,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 27.5) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-14 06:20:00,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 1511 transitions. [2022-07-14 06:20:00,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-14 06:20:00,899 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:20:00,899 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:20:00,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-14 06:20:01,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-14 06:20:01,118 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:20:01,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:20:01,119 INFO L85 PathProgramCache]: Analyzing trace with hash 22933, now seen corresponding path program 1 times [2022-07-14 06:20:01,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:20:01,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085438152] [2022-07-14 06:20:01,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:20:01,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:20:01,140 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:20:01,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651128433] [2022-07-14 06:20:01,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:20:01,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:20:01,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:20:01,142 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:20:01,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-14 06:20:01,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:20:01,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-14 06:20:01,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:20:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-14 06:20:01,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:20:01,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:20:01,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085438152] [2022-07-14 06:20:01,852 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:20:01,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651128433] [2022-07-14 06:20:01,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651128433] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:20:01,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:20:01,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:20:01,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712001529] [2022-07-14 06:20:01,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:20:01,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:20:01,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:20:01,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:20:01,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:20:01,853 INFO L87 Difference]: Start difference. First operand 1248 states and 1511 transitions. Second operand has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-14 06:20:02,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:20:02,045 INFO L93 Difference]: Finished difference Result 1361 states and 1643 transitions. [2022-07-14 06:20:02,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:20:02,045 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 136 [2022-07-14 06:20:02,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:20:02,048 INFO L225 Difference]: With dead ends: 1361 [2022-07-14 06:20:02,048 INFO L226 Difference]: Without dead ends: 1361 [2022-07-14 06:20:02,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 132 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 06:20:02,049 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 599 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:20:02,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [599 Valid, 327 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:20:02,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2022-07-14 06:20:02,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1295. [2022-07-14 06:20:02,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1105 states have (on average 1.2633484162895927) internal successors, (1396), 1161 states have internal predecessors, (1396), 99 states have call successors, (99), 29 states have call predecessors, (99), 30 states have return successors, (104), 104 states have call predecessors, (104), 99 states have call successors, (104) [2022-07-14 06:20:02,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1599 transitions. [2022-07-14 06:20:02,061 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1599 transitions. Word has length 136 [2022-07-14 06:20:02,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:20:02,061 INFO L495 AbstractCegarLoop]: Abstraction has 1295 states and 1599 transitions. [2022-07-14 06:20:02,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-14 06:20:02,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1599 transitions. [2022-07-14 06:20:02,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-14 06:20:02,062 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:20:02,062 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:20:02,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-14 06:20:02,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-14 06:20:02,283 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:20:02,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:20:02,283 INFO L85 PathProgramCache]: Analyzing trace with hash 22934, now seen corresponding path program 1 times [2022-07-14 06:20:02,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:20:02,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931972850] [2022-07-14 06:20:02,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:20:02,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:20:02,308 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:20:02,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100370639] [2022-07-14 06:20:02,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:20:02,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:20:02,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:20:02,310 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:20:02,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-14 06:20:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:20:02,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-14 06:20:02,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:20:03,182 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-14 06:20:03,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:20:03,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:20:03,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931972850] [2022-07-14 06:20:03,182 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:20:03,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100370639] [2022-07-14 06:20:03,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100370639] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:20:03,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:20:03,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:20:03,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848973577] [2022-07-14 06:20:03,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:20:03,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:20:03,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:20:03,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:20:03,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:20:03,183 INFO L87 Difference]: Start difference. First operand 1295 states and 1599 transitions. Second operand has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-14 06:20:03,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:20:03,327 INFO L93 Difference]: Finished difference Result 1290 states and 1589 transitions. [2022-07-14 06:20:03,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:20:03,327 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 136 [2022-07-14 06:20:03,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:20:03,331 INFO L225 Difference]: With dead ends: 1290 [2022-07-14 06:20:03,331 INFO L226 Difference]: Without dead ends: 1290 [2022-07-14 06:20:03,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 132 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 06:20:03,332 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 250 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:20:03,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 328 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:20:03,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2022-07-14 06:20:03,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 1289. [2022-07-14 06:20:03,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1105 states have (on average 1.253393665158371) internal successors, (1385), 1155 states have internal predecessors, (1385), 99 states have call successors, (99), 29 states have call predecessors, (99), 30 states have return successors, (104), 104 states have call predecessors, (104), 99 states have call successors, (104) [2022-07-14 06:20:03,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 1588 transitions. [2022-07-14 06:20:03,355 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 1588 transitions. Word has length 136 [2022-07-14 06:20:03,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:20:03,356 INFO L495 AbstractCegarLoop]: Abstraction has 1289 states and 1588 transitions. [2022-07-14 06:20:03,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-14 06:20:03,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 1588 transitions. [2022-07-14 06:20:03,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-14 06:20:03,358 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:20:03,358 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:20:03,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-07-14 06:20:03,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-14 06:20:03,573 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting l0_destroyErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:20:03,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:20:03,574 INFO L85 PathProgramCache]: Analyzing trace with hash -283985079, now seen corresponding path program 1 times [2022-07-14 06:20:03,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:20:03,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131609703] [2022-07-14 06:20:03,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:20:03,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:20:03,601 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:20:03,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [816806458] [2022-07-14 06:20:03,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:20:03,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:20:03,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:20:03,602 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:20:03,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-14 06:20:04,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:20:04,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 06:20:04,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:20:04,194 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-14 06:20:04,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:20:04,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:20:04,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131609703] [2022-07-14 06:20:04,195 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:20:04,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816806458] [2022-07-14 06:20:04,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816806458] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:20:04,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:20:04,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:20:04,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65727779] [2022-07-14 06:20:04,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:20:04,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:20:04,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:20:04,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:20:04,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:20:04,196 INFO L87 Difference]: Start difference. First operand 1289 states and 1588 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-14 06:20:04,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:20:04,218 INFO L93 Difference]: Finished difference Result 1429 states and 1770 transitions. [2022-07-14 06:20:04,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:20:04,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 140 [2022-07-14 06:20:04,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:20:04,222 INFO L225 Difference]: With dead ends: 1429 [2022-07-14 06:20:04,222 INFO L226 Difference]: Without dead ends: 1429 [2022-07-14 06:20:04,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 137 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 06:20:04,222 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 215 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:20:04,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 671 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:20:04,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1429 states. [2022-07-14 06:20:04,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1429 to 1394. [2022-07-14 06:20:04,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1208 states have (on average 1.2971854304635762) internal successors, (1567), 1259 states have internal predecessors, (1567), 99 states have call successors, (99), 30 states have call predecessors, (99), 32 states have return successors, (104), 104 states have call predecessors, (104), 99 states have call successors, (104) [2022-07-14 06:20:04,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 1770 transitions. [2022-07-14 06:20:04,235 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 1770 transitions. Word has length 140 [2022-07-14 06:20:04,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:20:04,236 INFO L495 AbstractCegarLoop]: Abstraction has 1394 states and 1770 transitions. [2022-07-14 06:20:04,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-14 06:20:04,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 1770 transitions. [2022-07-14 06:20:04,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-14 06:20:04,236 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:20:04,236 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:20:04,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-07-14 06:20:04,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-07-14 06:20:04,441 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:20:04,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:20:04,441 INFO L85 PathProgramCache]: Analyzing trace with hash -283990552, now seen corresponding path program 1 times [2022-07-14 06:20:04,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:20:04,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946325431] [2022-07-14 06:20:04,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:20:04,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:20:04,467 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:20:04,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765217961] [2022-07-14 06:20:04,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:20:04,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:20:04,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:20:04,472 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:20:04,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-14 06:20:05,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:20:05,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-14 06:20:05,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:20:05,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:20:05,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-14 06:20:05,524 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-14 06:20:05,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:20:05,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:20:05,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946325431] [2022-07-14 06:20:05,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:20:05,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765217961] [2022-07-14 06:20:05,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765217961] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:20:05,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:20:05,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-14 06:20:05,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188472957] [2022-07-14 06:20:05,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:20:05,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 06:20:05,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:20:05,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 06:20:05,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:20:05,526 INFO L87 Difference]: Start difference. First operand 1394 states and 1770 transitions. Second operand has 9 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-14 06:20:06,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:20:06,069 INFO L93 Difference]: Finished difference Result 1704 states and 2140 transitions. [2022-07-14 06:20:06,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-14 06:20:06,070 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 140 [2022-07-14 06:20:06,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:20:06,074 INFO L225 Difference]: With dead ends: 1704 [2022-07-14 06:20:06,074 INFO L226 Difference]: Without dead ends: 1704 [2022-07-14 06:20:06,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-07-14 06:20:06,074 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 804 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:20:06,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [808 Valid, 1045 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:20:06,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1704 states. [2022-07-14 06:20:06,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1704 to 1466. [2022-07-14 06:20:06,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1281 states have (on average 1.3224043715846994) internal successors, (1694), 1331 states have internal predecessors, (1694), 99 states have call successors, (99), 30 states have call predecessors, (99), 32 states have return successors, (104), 104 states have call predecessors, (104), 99 states have call successors, (104) [2022-07-14 06:20:06,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 1897 transitions. [2022-07-14 06:20:06,093 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 1897 transitions. Word has length 140 [2022-07-14 06:20:06,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:20:06,093 INFO L495 AbstractCegarLoop]: Abstraction has 1466 states and 1897 transitions. [2022-07-14 06:20:06,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-14 06:20:06,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 1897 transitions. [2022-07-14 06:20:06,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-14 06:20:06,094 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:20:06,094 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:20:06,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-14 06:20:06,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:20:06,315 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:20:06,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:20:06,316 INFO L85 PathProgramCache]: Analyzing trace with hash -283990551, now seen corresponding path program 1 times [2022-07-14 06:20:06,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:20:06,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451937973] [2022-07-14 06:20:06,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:20:06,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:20:06,344 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:20:06,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [757186919] [2022-07-14 06:20:06,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:20:06,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:20:06,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:20:06,346 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:20:06,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-14 06:20:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:20:06,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-14 06:20:06,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:20:07,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:20:07,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:20:07,895 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 23 treesize of output 15 [2022-07-14 06:20:07,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-07-14 06:20:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-14 06:20:07,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:20:07,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:20:07,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451937973] [2022-07-14 06:20:07,975 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:20:07,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757186919] [2022-07-14 06:20:07,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757186919] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:20:07,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:20:07,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-14 06:20:07,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958996593] [2022-07-14 06:20:07,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:20:07,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-14 06:20:07,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:20:07,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-14 06:20:07,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:20:07,976 INFO L87 Difference]: Start difference. First operand 1466 states and 1897 transitions. Second operand has 11 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:20:08,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:20:08,997 INFO L93 Difference]: Finished difference Result 1627 states and 2060 transitions. [2022-07-14 06:20:08,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 06:20:08,998 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 140 [2022-07-14 06:20:08,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:20:09,003 INFO L225 Difference]: With dead ends: 1627 [2022-07-14 06:20:09,003 INFO L226 Difference]: Without dead ends: 1627 [2022-07-14 06:20:09,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-07-14 06:20:09,004 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 1163 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-14 06:20:09,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1163 Valid, 1130 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-14 06:20:09,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2022-07-14 06:20:09,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1553. [2022-07-14 06:20:09,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1553 states, 1368 states have (on average 1.3523391812865497) internal successors, (1850), 1418 states have internal predecessors, (1850), 99 states have call successors, (99), 30 states have call predecessors, (99), 32 states have return successors, (104), 104 states have call predecessors, (104), 99 states have call successors, (104) [2022-07-14 06:20:09,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1553 states to 1553 states and 2053 transitions. [2022-07-14 06:20:09,025 INFO L78 Accepts]: Start accepts. Automaton has 1553 states and 2053 transitions. Word has length 140 [2022-07-14 06:20:09,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:20:09,025 INFO L495 AbstractCegarLoop]: Abstraction has 1553 states and 2053 transitions. [2022-07-14 06:20:09,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:20:09,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states and 2053 transitions. [2022-07-14 06:20:09,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-14 06:20:09,027 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:20:09,027 INFO L195 NwaCegarLoop]: trace histogram [36, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2022-07-14 06:20:09,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-14 06:20:09,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:20:09,247 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:20:09,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:20:09,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1734213140, now seen corresponding path program 1 times [2022-07-14 06:20:09,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:20:09,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998889067] [2022-07-14 06:20:09,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:20:09,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:20:09,279 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:20:09,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2000046941] [2022-07-14 06:20:09,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:20:09,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:20:09,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:20:09,281 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:20:09,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-14 06:20:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:20:09,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-14 06:20:09,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:20:10,075 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:20:10,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-14 06:20:10,148 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:20:10,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-14 06:20:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 481 proven. 6 refuted. 0 times theorem prover too weak. 690 trivial. 0 not checked. [2022-07-14 06:20:10,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:20:10,366 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-14 06:20:10,367 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 06:20:10,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 481 proven. 6 refuted. 0 times theorem prover too weak. 690 trivial. 0 not checked. [2022-07-14 06:20:10,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:20:10,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998889067] [2022-07-14 06:20:10,405 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:20:10,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000046941] [2022-07-14 06:20:10,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000046941] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:20:10,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:20:10,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-07-14 06:20:10,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451284012] [2022-07-14 06:20:10,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:20:10,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 06:20:10,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:20:10,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 06:20:10,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:20:10,406 INFO L87 Difference]: Start difference. First operand 1553 states and 2053 transitions. Second operand has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-14 06:20:10,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:20:10,685 INFO L93 Difference]: Finished difference Result 1655 states and 2163 transitions. [2022-07-14 06:20:10,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:20:10,686 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 142 [2022-07-14 06:20:10,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:20:10,690 INFO L225 Difference]: With dead ends: 1655 [2022-07-14 06:20:10,690 INFO L226 Difference]: Without dead ends: 1655 [2022-07-14 06:20:10,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 267 SyntacticMatches, 9 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:20:10,691 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 316 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:20:10,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 1135 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 324 Invalid, 0 Unknown, 262 Unchecked, 0.2s Time] [2022-07-14 06:20:10,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2022-07-14 06:20:10,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 1552. [2022-07-14 06:20:10,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1368 states have (on average 1.340643274853801) internal successors, (1834), 1417 states have internal predecessors, (1834), 99 states have call successors, (99), 30 states have call predecessors, (99), 32 states have return successors, (104), 104 states have call predecessors, (104), 99 states have call successors, (104) [2022-07-14 06:20:10,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 2037 transitions. [2022-07-14 06:20:10,720 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 2037 transitions. Word has length 142 [2022-07-14 06:20:10,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:20:10,720 INFO L495 AbstractCegarLoop]: Abstraction has 1552 states and 2037 transitions. [2022-07-14 06:20:10,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-14 06:20:10,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 2037 transitions. [2022-07-14 06:20:10,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-14 06:20:10,723 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:20:10,723 INFO L195 NwaCegarLoop]: trace histogram [36, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2022-07-14 06:20:10,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-14 06:20:10,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-07-14 06:20:10,944 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:20:10,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:20:10,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1734213139, now seen corresponding path program 1 times [2022-07-14 06:20:10,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:20:10,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266206790] [2022-07-14 06:20:10,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:20:10,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:20:10,978 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:20:10,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [804300477] [2022-07-14 06:20:10,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:20:10,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:20:10,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:20:10,996 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:20:11,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-14 06:20:11,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:20:11,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-14 06:20:11,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:20:12,134 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:20:12,135 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-14 06:20:12,159 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-14 06:20:12,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-14 06:20:12,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:20:12,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-14 06:20:12,314 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-14 06:20:12,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-14 06:20:12,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 503 proven. 196 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2022-07-14 06:20:12,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:20:12,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:20:12,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266206790] [2022-07-14 06:20:12,507 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:20:12,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804300477] [2022-07-14 06:20:12,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804300477] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:20:12,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:20:12,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-07-14 06:20:12,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457145491] [2022-07-14 06:20:12,508 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-14 06:20:12,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-14 06:20:12,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:20:12,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-14 06:20:12,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-07-14 06:20:12,509 INFO L87 Difference]: Start difference. First operand 1552 states and 2037 transitions. Second operand has 21 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-14 06:20:13,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:20:13,748 INFO L93 Difference]: Finished difference Result 1852 states and 2404 transitions. [2022-07-14 06:20:13,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-14 06:20:13,749 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 142 [2022-07-14 06:20:13,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:20:13,754 INFO L225 Difference]: With dead ends: 1852 [2022-07-14 06:20:13,754 INFO L226 Difference]: Without dead ends: 1852 [2022-07-14 06:20:13,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2022-07-14 06:20:13,755 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 482 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 1598 SdHoareTripleChecker+Invalid, 3358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1564 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:20:13,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 1598 Invalid, 3358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1678 Invalid, 0 Unknown, 1564 Unchecked, 1.0s Time] [2022-07-14 06:20:13,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2022-07-14 06:20:13,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1551. [2022-07-14 06:20:13,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1368 states have (on average 1.3289473684210527) internal successors, (1818), 1416 states have internal predecessors, (1818), 99 states have call successors, (99), 30 states have call predecessors, (99), 32 states have return successors, (104), 104 states have call predecessors, (104), 99 states have call successors, (104) [2022-07-14 06:20:13,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 2021 transitions. [2022-07-14 06:20:13,778 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 2021 transitions. Word has length 142 [2022-07-14 06:20:13,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:20:13,778 INFO L495 AbstractCegarLoop]: Abstraction has 1551 states and 2021 transitions. [2022-07-14 06:20:13,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-14 06:20:13,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 2021 transitions. [2022-07-14 06:20:13,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-14 06:20:13,780 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:20:13,780 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:20:13,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-14 06:20:14,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-14 06:20:14,004 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:20:14,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:20:14,004 INFO L85 PathProgramCache]: Analyzing trace with hash 723198554, now seen corresponding path program 1 times [2022-07-14 06:20:14,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:20:14,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001501150] [2022-07-14 06:20:14,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:20:14,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:20:14,038 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 06:20:14,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1651348579] [2022-07-14 06:20:14,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:20:14,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:20:14,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:20:14,040 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:20:14,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-14 06:20:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:20:14,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-14 06:20:14,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:20:14,918 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:20:14,919 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 06:20:15,624 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 06:20:15,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:20:15,704 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 06:20:15,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-14 06:20:15,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:20:15,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:20:15,876 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:20:15,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 16 [2022-07-14 06:20:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2022-07-14 06:20:15,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:20:16,004 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 84 treesize of output 80 [2022-07-14 06:20:30,421 WARN L233 SmtUtils]: Spent 8.05s on a formula simplification. DAG size of input: 34 DAG size of output: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-14 06:20:32,455 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_arrayElimCell_202 Int) (v_ArrVal_12860 Int)) (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_l0_insert_~item~4#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_l0_insert_~item~4#1.base|) |c_ULTIMATE.start_l0_insert_~item~4#1.offset| v_ArrVal_12860)))) (store .cse2 |c_ULTIMATE.start_l0_insert_~list#1.base| (store (select .cse2 |c_ULTIMATE.start_l0_insert_~list#1.base|) |c_ULTIMATE.start_l0_insert_~list#1.offset| |c_ULTIMATE.start_l0_insert_~item~4#1.base|))))) (select .cse1 (select (select .cse1 |c_~#list~0.base|) |c_~#list~0.offset|))))) (or (= (select |c_#valid| (select .cse0 (+ v_arrayElimCell_202 4))) 1) (and (= |c_~#list~0.offset| |c_ULTIMATE.start_l0_insert_~list#1.offset|) (= |c_~#list~0.base| |c_ULTIMATE.start_l0_insert_~list#1.base|) (= (select |c_#valid| (select .cse0 (+ |c_ULTIMATE.start_l0_insert_~item~4#1.offset| 4))) 1))))) is different from false [2022-07-14 06:20:32,915 INFO L356 Elim1Store]: treesize reduction 196, result has 54.3 percent of original size [2022-07-14 06:20:32,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 20388 treesize of output 18840 [2022-07-14 06:20:33,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:20:33,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001501150] [2022-07-14 06:20:33,561 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 06:20:33,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651348579] [2022-07-14 06:20:33,562 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-14 06:20:33,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-07-14 06:20:33,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-14 06:20:33,777 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ArithmeticException: BigInteger out of long range at java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.computeDerApplicabilityScore(QuantifierPusher.java:545) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.selectBestEliminatee(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:348) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:176) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:265) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:251) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:300) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:152) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-07-14 06:20:33,781 INFO L158 Benchmark]: Toolchain (without parser) took 128672.15ms. Allocated memory was 100.7MB in the beginning and 343.9MB in the end (delta: 243.3MB). Free memory was 65.5MB in the beginning and 158.8MB in the end (delta: -93.3MB). Peak memory consumption was 236.7MB. Max. memory is 16.1GB. [2022-07-14 06:20:33,781 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 100.7MB. Free memory was 57.1MB in the beginning and 57.0MB in the end (delta: 70.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 06:20:33,781 INFO L158 Benchmark]: CACSL2BoogieTranslator took 442.83ms. Allocated memory is still 100.7MB. Free memory was 65.3MB in the beginning and 63.5MB in the end (delta: 1.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-14 06:20:33,782 INFO L158 Benchmark]: Boogie Procedure Inliner took 77.88ms. Allocated memory is still 100.7MB. Free memory was 63.5MB in the beginning and 60.9MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-14 06:20:33,782 INFO L158 Benchmark]: Boogie Preprocessor took 52.80ms. Allocated memory is still 100.7MB. Free memory was 60.5MB in the beginning and 58.4MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 06:20:33,782 INFO L158 Benchmark]: RCFGBuilder took 748.96ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 58.4MB in the beginning and 88.2MB in the end (delta: -29.7MB). Peak memory consumption was 33.5MB. Max. memory is 16.1GB. [2022-07-14 06:20:33,782 INFO L158 Benchmark]: TraceAbstraction took 127344.16ms. Allocated memory was 121.6MB in the beginning and 343.9MB in the end (delta: 222.3MB). Free memory was 88.2MB in the beginning and 158.8MB in the end (delta: -70.6MB). Peak memory consumption was 239.2MB. Max. memory is 16.1GB. [2022-07-14 06:20:33,783 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 100.7MB. Free memory was 57.1MB in the beginning and 57.0MB in the end (delta: 70.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 442.83ms. Allocated memory is still 100.7MB. Free memory was 65.3MB in the beginning and 63.5MB in the end (delta: 1.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 77.88ms. Allocated memory is still 100.7MB. Free memory was 63.5MB in the beginning and 60.9MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 52.80ms. Allocated memory is still 100.7MB. Free memory was 60.5MB in the beginning and 58.4MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 748.96ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 58.4MB in the beginning and 88.2MB in the end (delta: -29.7MB). Peak memory consumption was 33.5MB. Max. memory is 16.1GB. * TraceAbstraction took 127344.16ms. Allocated memory was 121.6MB in the beginning and 343.9MB in the end (delta: 222.3MB). Free memory was 88.2MB in the beginning and 158.8MB in the end (delta: -70.6MB). Peak memory consumption was 239.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: ArithmeticException: BigInteger out of long range de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ArithmeticException: BigInteger out of long range: java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-14 06:20:33,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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-0235-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 6e8dd9d71aae7a8c83467a9093ad4bffb4ddd59cddc2d90362f34ff651f24f9a --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:20:35,672 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:20:35,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:20:35,712 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:20:35,712 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:20:35,714 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:20:35,721 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:20:35,724 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:20:35,726 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:20:35,729 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:20:35,730 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:20:35,735 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:20:35,736 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:20:35,741 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:20:35,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:20:35,744 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:20:35,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:20:35,745 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:20:35,747 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:20:35,751 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:20:35,753 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:20:35,757 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:20:35,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:20:35,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:20:35,759 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:20:35,762 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:20:35,762 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:20:35,762 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:20:35,763 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:20:35,763 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:20:35,764 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:20:35,764 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:20:35,765 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:20:35,765 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:20:35,766 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:20:35,767 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:20:35,767 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:20:35,768 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:20:35,768 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:20:35,768 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:20:35,769 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:20:35,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:20:35,772 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-14 06:20:35,798 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:20:35,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:20:35,800 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:20:35,800 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:20:35,801 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:20:35,801 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:20:35,802 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:20:35,802 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:20:35,802 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:20:35,803 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:20:35,803 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:20:35,803 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:20:35,803 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:20:35,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:20:35,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:20:35,804 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:20:35,804 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:20:35,804 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:20:35,804 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:20:35,804 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:20:35,804 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-14 06:20:35,804 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-14 06:20:35,805 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:20:35,805 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:20:35,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:20:35,805 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:20:35,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:20:35,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:20:35,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:20:35,806 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:20:35,806 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-14 06:20:35,806 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-14 06:20:35,806 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-14 06:20:35,806 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e8dd9d71aae7a8c83467a9093ad4bffb4ddd59cddc2d90362f34ff651f24f9a [2022-07-14 06:20:36,145 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:20:36,169 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:20:36,171 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:20:36,172 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:20:36,173 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:20:36,175 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0235-1.i [2022-07-14 06:20:36,243 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b99c86a94/b7ec4bb593d2462c8ab0742b02011f9e/FLAGef08b78ca [2022-07-14 06:20:36,724 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:20:36,725 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0235-1.i [2022-07-14 06:20:36,742 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b99c86a94/b7ec4bb593d2462c8ab0742b02011f9e/FLAGef08b78ca [2022-07-14 06:20:37,091 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b99c86a94/b7ec4bb593d2462c8ab0742b02011f9e [2022-07-14 06:20:37,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:20:37,094 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:20:37,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:20:37,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:20:37,099 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:20:37,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:20:37" (1/1) ... [2022-07-14 06:20:37,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d87918e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:20:37, skipping insertion in model container [2022-07-14 06:20:37,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:20:37" (1/1) ... [2022-07-14 06:20:37,108 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:20:37,159 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:20:37,497 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:20:37,510 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 06:20:37,572 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:20:37,602 INFO L208 MainTranslator]: Completed translation [2022-07-14 06:20:37,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:20:37 WrapperNode [2022-07-14 06:20:37,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:20:37,605 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 06:20:37,606 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 06:20:37,606 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 06:20:37,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:20:37" (1/1) ... [2022-07-14 06:20:37,630 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:20:37" (1/1) ... [2022-07-14 06:20:37,672 INFO L137 Inliner]: procedures = 189, calls = 69, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 230 [2022-07-14 06:20:37,672 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 06:20:37,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 06:20:37,673 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 06:20:37,673 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 06:20:37,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:20:37" (1/1) ... [2022-07-14 06:20:37,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:20:37" (1/1) ... [2022-07-14 06:20:37,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:20:37" (1/1) ... [2022-07-14 06:20:37,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:20:37" (1/1) ... [2022-07-14 06:20:37,696 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:20:37" (1/1) ... [2022-07-14 06:20:37,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:20:37" (1/1) ... [2022-07-14 06:20:37,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:20:37" (1/1) ... [2022-07-14 06:20:37,712 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 06:20:37,713 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 06:20:37,713 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 06:20:37,713 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 06:20:37,714 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:20:37" (1/1) ... [2022-07-14 06:20:37,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:20:37,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:20:37,736 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 06:20:37,742 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 06:20:37,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-14 06:20:37,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-14 06:20:37,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-14 06:20:37,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-14 06:20:37,765 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2022-07-14 06:20:37,765 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2022-07-14 06:20:37,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 06:20:37,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-14 06:20:37,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-14 06:20:37,773 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2022-07-14 06:20:37,773 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2022-07-14 06:20:37,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 06:20:37,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 06:20:37,890 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 06:20:37,892 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 06:20:38,496 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 06:20:38,504 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 06:20:38,505 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-07-14 06:20:38,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:20:38 BoogieIcfgContainer [2022-07-14 06:20:38,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 06:20:38,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 06:20:38,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 06:20:38,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 06:20:38,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 06:20:37" (1/3) ... [2022-07-14 06:20:38,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bd74d0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:20:38, skipping insertion in model container [2022-07-14 06:20:38,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:20:37" (2/3) ... [2022-07-14 06:20:38,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bd74d0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:20:38, skipping insertion in model container [2022-07-14 06:20:38,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:20:38" (3/3) ... [2022-07-14 06:20:38,513 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0235-1.i [2022-07-14 06:20:38,524 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 06:20:38,524 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 85 error locations. [2022-07-14 06:20:38,563 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 06:20:38,567 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@6b6b1b70, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@380badbb [2022-07-14 06:20:38,568 INFO L358 AbstractCegarLoop]: Starting to check reachability of 85 error locations. [2022-07-14 06:20:38,571 INFO L276 IsEmpty]: Start isEmpty. Operand has 228 states, 129 states have (on average 1.9069767441860466) internal successors, (246), 214 states have internal predecessors, (246), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-14 06:20:38,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-14 06:20:38,575 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:20:38,575 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-14 06:20:38,576 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:20:38,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:20:38,579 INFO L85 PathProgramCache]: Analyzing trace with hash 929958, now seen corresponding path program 1 times [2022-07-14 06:20:38,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:20:38,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92291745] [2022-07-14 06:20:38,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:20:38,587 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:20:38,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:20:38,590 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:20:38,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-14 06:20:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:20:38,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-14 06:20:38,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:20:38,687 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 06:20:38,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:20:38,688 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:20:38,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92291745] [2022-07-14 06:20:38,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92291745] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:20:38,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:20:38,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:20:38,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57505618] [2022-07-14 06:20:38,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:20:38,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-14 06:20:38,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:20:38,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-14 06:20:38,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-14 06:20:38,711 INFO L87 Difference]: Start difference. First operand has 228 states, 129 states have (on average 1.9069767441860466) internal successors, (246), 214 states have internal predecessors, (246), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:20:38,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:20:38,759 INFO L93 Difference]: Finished difference Result 228 states and 257 transitions. [2022-07-14 06:20:38,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-14 06:20:38,760 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-07-14 06:20:38,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:20:38,768 INFO L225 Difference]: With dead ends: 228 [2022-07-14 06:20:38,769 INFO L226 Difference]: Without dead ends: 226 [2022-07-14 06:20:38,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 3 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 06:20:38,774 INFO L413 NwaCegarLoop]: 257 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, 257 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 06:20:38,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:20:38,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-07-14 06:20:38,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2022-07-14 06:20:38,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 128 states have (on average 1.8203125) internal successors, (233), 212 states have internal predecessors, (233), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-14 06:20:38,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 255 transitions. [2022-07-14 06:20:38,830 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 255 transitions. Word has length 4 [2022-07-14 06:20:38,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:20:38,831 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 255 transitions. [2022-07-14 06:20:38,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:20:38,832 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 255 transitions. [2022-07-14 06:20:38,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 06:20:38,832 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:20:38,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 06:20:38,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-14 06:20:39,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:20:39,040 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:20:39,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:20:39,040 INFO L85 PathProgramCache]: Analyzing trace with hash 889928016, now seen corresponding path program 1 times [2022-07-14 06:20:39,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:20:39,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [802314566] [2022-07-14 06:20:39,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:20:39,041 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:20:39,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:20:39,042 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:20:39,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-14 06:20:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:20:39,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:20:39,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:20:39,176 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 06:20:39,183 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 06:20:39,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:20:39,183 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:20:39,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [802314566] [2022-07-14 06:20:39,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [802314566] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:20:39,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:20:39,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:20:39,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710864185] [2022-07-14 06:20:39,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:20:39,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:20:39,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:20:39,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:20:39,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:20:39,195 INFO L87 Difference]: Start difference. First operand 226 states and 255 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:20:39,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:20:39,395 INFO L93 Difference]: Finished difference Result 225 states and 254 transitions. [2022-07-14 06:20:39,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:20:39,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-14 06:20:39,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:20:39,396 INFO L225 Difference]: With dead ends: 225 [2022-07-14 06:20:39,396 INFO L226 Difference]: Without dead ends: 225 [2022-07-14 06:20:39,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 06:20:39,397 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 9 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:20:39,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 408 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:20:39,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-07-14 06:20:39,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2022-07-14 06:20:39,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 128 states have (on average 1.8125) internal successors, (232), 211 states have internal predecessors, (232), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-14 06:20:39,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 254 transitions. [2022-07-14 06:20:39,417 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 254 transitions. Word has length 6 [2022-07-14 06:20:39,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:20:39,417 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 254 transitions. [2022-07-14 06:20:39,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:20:39,418 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 254 transitions. [2022-07-14 06:20:39,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 06:20:39,418 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:20:39,418 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:20:39,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-14 06:20:39,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:20:39,628 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:20:39,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:20:39,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1817965136, now seen corresponding path program 1 times [2022-07-14 06:20:39,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:20:39,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1267109120] [2022-07-14 06:20:39,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:20:39,629 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:20:39,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:20:39,630 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:20:39,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-14 06:20:39,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:20:39,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-14 06:20:39,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:20:39,754 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 06:20:39,777 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 06:20:39,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:20:39,777 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:20:39,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1267109120] [2022-07-14 06:20:39,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1267109120] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:20:39,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:20:39,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:20:39,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285757305] [2022-07-14 06:20:39,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:20:39,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:20:39,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:20:39,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:20:39,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:20:39,782 INFO L87 Difference]: Start difference. First operand 225 states and 254 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:20:40,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:20:40,016 INFO L93 Difference]: Finished difference Result 234 states and 263 transitions. [2022-07-14 06:20:40,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:20:40,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-14 06:20:40,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:20:40,017 INFO L225 Difference]: With dead ends: 234 [2022-07-14 06:20:40,017 INFO L226 Difference]: Without dead ends: 234 [2022-07-14 06:20:40,018 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 06:20:40,018 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 16 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:20:40,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 662 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:20:40,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-07-14 06:20:40,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2022-07-14 06:20:40,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 136 states have (on average 1.7720588235294117) internal successors, (241), 219 states have internal predecessors, (241), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-14 06:20:40,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 263 transitions. [2022-07-14 06:20:40,028 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 263 transitions. Word has length 7 [2022-07-14 06:20:40,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:20:40,028 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 263 transitions. [2022-07-14 06:20:40,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:20:40,028 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 263 transitions. [2022-07-14 06:20:40,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-14 06:20:40,029 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:20:40,030 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 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 06:20:40,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-14 06:20:40,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:20:40,239 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:20:40,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:20:40,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1126435929, now seen corresponding path program 1 times [2022-07-14 06:20:40,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:20:40,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1658958523] [2022-07-14 06:20:40,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:20:40,240 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:20:40,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:20:40,241 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:20:40,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-14 06:20:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:20:40,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-14 06:20:40,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:20:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-14 06:20:40,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:20:40,471 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:20:40,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1658958523] [2022-07-14 06:20:40,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1658958523] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:20:40,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:20:40,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:20:40,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604767957] [2022-07-14 06:20:40,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:20:40,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:20:40,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:20:40,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:20:40,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:20:40,473 INFO L87 Difference]: Start difference. First operand 234 states and 263 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-14 06:20:40,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:20:40,541 INFO L93 Difference]: Finished difference Result 246 states and 275 transitions. [2022-07-14 06:20:40,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:20:40,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2022-07-14 06:20:40,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:20:40,543 INFO L225 Difference]: With dead ends: 246 [2022-07-14 06:20:40,543 INFO L226 Difference]: Without dead ends: 236 [2022-07-14 06:20:40,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:20:40,544 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 13 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:20:40,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 950 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:20:40,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-07-14 06:20:40,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2022-07-14 06:20:40,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 138 states have (on average 1.7608695652173914) internal successors, (243), 221 states have internal predecessors, (243), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-14 06:20:40,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 265 transitions. [2022-07-14 06:20:40,550 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 265 transitions. Word has length 66 [2022-07-14 06:20:40,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:20:40,551 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 265 transitions. [2022-07-14 06:20:40,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-14 06:20:40,551 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 265 transitions. [2022-07-14 06:20:40,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-14 06:20:40,552 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:20:40,552 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 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 06:20:40,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-14 06:20:40,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:20:40,768 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:20:40,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:20:40,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1056190273, now seen corresponding path program 1 times [2022-07-14 06:20:40,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:20:40,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390283566] [2022-07-14 06:20:40,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:20:40,769 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:20:40,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:20:40,770 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:20:40,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-14 06:20:40,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:20:40,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 06:20:40,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:20:41,058 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 51 proven. 1 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-07-14 06:20:41,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:20:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-07-14 06:20:41,283 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:20:41,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390283566] [2022-07-14 06:20:41,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390283566] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:20:41,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:20:41,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-14 06:20:41,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266548325] [2022-07-14 06:20:41,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:20:41,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 06:20:41,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:20:41,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 06:20:41,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:20:41,286 INFO L87 Difference]: Start difference. First operand 236 states and 265 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-14 06:20:41,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:20:41,504 INFO L93 Difference]: Finished difference Result 255 states and 285 transitions. [2022-07-14 06:20:41,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:20:41,505 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 71 [2022-07-14 06:20:41,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:20:41,506 INFO L225 Difference]: With dead ends: 255 [2022-07-14 06:20:41,506 INFO L226 Difference]: Without dead ends: 240 [2022-07-14 06:20:41,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-07-14 06:20:41,507 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 48 mSDsluCounter, 1186 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1431 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:20:41,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1431 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:20:41,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-14 06:20:41,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-07-14 06:20:41,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 142 states have (on average 1.7394366197183098) internal successors, (247), 225 states have internal predecessors, (247), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-14 06:20:41,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 269 transitions. [2022-07-14 06:20:41,513 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 269 transitions. Word has length 71 [2022-07-14 06:20:41,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:20:41,513 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 269 transitions. [2022-07-14 06:20:41,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-14 06:20:41,513 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 269 transitions. [2022-07-14 06:20:41,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-14 06:20:41,515 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:20:41,515 INFO L195 NwaCegarLoop]: trace histogram [20, 6, 6, 5, 5, 5, 5, 5, 5, 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 06:20:41,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-14 06:20:41,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:20:41,723 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:20:41,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:20:41,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1608257113, now seen corresponding path program 2 times [2022-07-14 06:20:41,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:20:41,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706280507] [2022-07-14 06:20:41,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:20:41,724 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:20:41,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:20:41,725 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:20:41,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-14 06:20:41,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-14 06:20:41,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:20:41,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 06:20:41,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:20:41,884 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-14 06:20:41,993 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-07-14 06:20:41,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:20:41,993 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:20:41,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706280507] [2022-07-14 06:20:41,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706280507] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:20:41,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:20:41,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:20:41,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631575121] [2022-07-14 06:20:41,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:20:41,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:20:41,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:20:41,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:20:41,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:20:41,995 INFO L87 Difference]: Start difference. First operand 240 states and 269 transitions. Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-14 06:20:41,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:20:41,999 INFO L93 Difference]: Finished difference Result 239 states and 268 transitions. [2022-07-14 06:20:41,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:20:42,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 86 [2022-07-14 06:20:42,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:20:42,001 INFO L225 Difference]: With dead ends: 239 [2022-07-14 06:20:42,001 INFO L226 Difference]: Without dead ends: 239 [2022-07-14 06:20:42,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 84 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 06:20:42,002 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 0 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:20:42,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 433 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 70 Unchecked, 0.0s Time] [2022-07-14 06:20:42,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-07-14 06:20:42,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2022-07-14 06:20:42,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 142 states have (on average 1.732394366197183) internal successors, (246), 224 states have internal predecessors, (246), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-14 06:20:42,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 268 transitions. [2022-07-14 06:20:42,008 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 268 transitions. Word has length 86 [2022-07-14 06:20:42,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:20:42,008 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 268 transitions. [2022-07-14 06:20:42,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-14 06:20:42,009 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 268 transitions. [2022-07-14 06:20:42,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-14 06:20:42,010 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:20:42,011 INFO L195 NwaCegarLoop]: trace histogram [22, 6, 6, 6, 6, 6, 6, 6, 6, 1, 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 06:20:42,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-14 06:20:42,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:20:42,220 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:20:42,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:20:42,220 INFO L85 PathProgramCache]: Analyzing trace with hash 597742058, now seen corresponding path program 1 times [2022-07-14 06:20:42,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:20:42,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946182965] [2022-07-14 06:20:42,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:20:42,221 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:20:42,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:20:42,222 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:20:42,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-14 06:20:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:20:42,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-14 06:20:42,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:20:42,589 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 155 proven. 10 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-07-14 06:20:42,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:20:42,864 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2022-07-14 06:20:42,865 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:20:42,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946182965] [2022-07-14 06:20:42,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946182965] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:20:42,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:20:42,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-14 06:20:42,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303975090] [2022-07-14 06:20:42,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:20:42,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-14 06:20:42,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:20:42,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-14 06:20:42,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2022-07-14 06:20:42,866 INFO L87 Difference]: Start difference. First operand 239 states and 268 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-14 06:20:43,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:20:43,390 INFO L93 Difference]: Finished difference Result 271 states and 302 transitions. [2022-07-14 06:20:43,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-14 06:20:43,391 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 95 [2022-07-14 06:20:43,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:20:43,392 INFO L225 Difference]: With dead ends: 271 [2022-07-14 06:20:43,392 INFO L226 Difference]: Without dead ends: 246 [2022-07-14 06:20:43,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2022-07-14 06:20:43,393 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 96 mSDsluCounter, 1711 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1964 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:20:43,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 1964 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:20:43,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-07-14 06:20:43,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2022-07-14 06:20:43,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 149 states have (on average 1.6979865771812082) internal successors, (253), 231 states have internal predecessors, (253), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-14 06:20:43,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 275 transitions. [2022-07-14 06:20:43,399 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 275 transitions. Word has length 95 [2022-07-14 06:20:43,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:20:43,399 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 275 transitions. [2022-07-14 06:20:43,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-14 06:20:43,399 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 275 transitions. [2022-07-14 06:20:43,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-14 06:20:43,400 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:20:43,401 INFO L195 NwaCegarLoop]: trace histogram [45, 6, 6, 6, 6, 6, 6, 6, 6, 1, 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 06:20:43,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-14 06:20:43,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:20:43,614 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:20:43,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:20:43,614 INFO L85 PathProgramCache]: Analyzing trace with hash 891400244, now seen corresponding path program 2 times [2022-07-14 06:20:43,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:20:43,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1155447775] [2022-07-14 06:20:43,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:20:43,615 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:20:43,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:20:43,616 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:20:43,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-14 06:20:44,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:20:44,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:20:44,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-14 06:20:44,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:20:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 305 proven. 15 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-07-14 06:20:44,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:20:45,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 305 proven. 15 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-07-14 06:20:45,274 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:20:45,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1155447775] [2022-07-14 06:20:45,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1155447775] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:20:45,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:20:45,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-14 06:20:45,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803818570] [2022-07-14 06:20:45,275 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:20:45,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-14 06:20:45,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:20:45,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-14 06:20:45,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-07-14 06:20:45,277 INFO L87 Difference]: Start difference. First operand 246 states and 275 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-14 06:20:46,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:20:46,099 INFO L93 Difference]: Finished difference Result 263 states and 297 transitions. [2022-07-14 06:20:46,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-14 06:20:46,100 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 118 [2022-07-14 06:20:46,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:20:46,101 INFO L225 Difference]: With dead ends: 263 [2022-07-14 06:20:46,101 INFO L226 Difference]: Without dead ends: 253 [2022-07-14 06:20:46,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=345, Invalid=647, Unknown=0, NotChecked=0, Total=992 [2022-07-14 06:20:46,102 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 114 mSDsluCounter, 1709 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1956 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:20:46,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1956 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:20:46,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-07-14 06:20:46,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2022-07-14 06:20:46,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 156 states have (on average 1.6666666666666667) internal successors, (260), 238 states have internal predecessors, (260), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-14 06:20:46,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 282 transitions. [2022-07-14 06:20:46,108 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 282 transitions. Word has length 118 [2022-07-14 06:20:46,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:20:46,108 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 282 transitions. [2022-07-14 06:20:46,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-14 06:20:46,108 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 282 transitions. [2022-07-14 06:20:46,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-14 06:20:46,109 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:20:46,109 INFO L195 NwaCegarLoop]: trace histogram [52, 6, 6, 6, 6, 6, 6, 6, 6, 1, 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 06:20:46,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-07-14 06:20:46,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:20:46,323 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:20:46,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:20:46,323 INFO L85 PathProgramCache]: Analyzing trace with hash -407573974, now seen corresponding path program 3 times [2022-07-14 06:20:46,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:20:46,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1559957733] [2022-07-14 06:20:46,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:20:46,324 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:20:46,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:20:46,340 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:20:46,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-14 06:20:46,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-14 06:20:46,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:20:46,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 06:20:46,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:20:46,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:20:46,904 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:20:46,905 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 18 treesize of output 25 [2022-07-14 06:20:46,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 853 proven. 124 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2022-07-14 06:20:46,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:20:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 853 proven. 124 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2022-07-14 06:20:47,228 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:20:47,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1559957733] [2022-07-14 06:20:47,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1559957733] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:20:47,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:20:47,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2022-07-14 06:20:47,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469362197] [2022-07-14 06:20:47,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:20:47,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-14 06:20:47,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:20:47,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-14 06:20:47,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:20:47,231 INFO L87 Difference]: Start difference. First operand 253 states and 282 transitions. Second operand has 11 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-14 06:20:48,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:20:48,111 INFO L93 Difference]: Finished difference Result 260 states and 293 transitions. [2022-07-14 06:20:48,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 06:20:48,112 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 125 [2022-07-14 06:20:48,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:20:48,115 INFO L225 Difference]: With dead ends: 260 [2022-07-14 06:20:48,115 INFO L226 Difference]: Without dead ends: 260 [2022-07-14 06:20:48,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 236 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-07-14 06:20:48,115 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 83 mSDsluCounter, 1089 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-14 06:20:48,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 1315 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 609 Invalid, 0 Unknown, 129 Unchecked, 0.7s Time] [2022-07-14 06:20:48,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-07-14 06:20:48,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 251. [2022-07-14 06:20:48,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 156 states have (on average 1.6538461538461537) internal successors, (258), 236 states have internal predecessors, (258), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-14 06:20:48,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 280 transitions. [2022-07-14 06:20:48,125 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 280 transitions. Word has length 125 [2022-07-14 06:20:48,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:20:48,127 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 280 transitions. [2022-07-14 06:20:48,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-14 06:20:48,127 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 280 transitions. [2022-07-14 06:20:48,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-14 06:20:48,128 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:20:48,128 INFO L195 NwaCegarLoop]: trace histogram [52, 6, 6, 6, 6, 6, 6, 6, 6, 1, 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 06:20:48,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-14 06:20:48,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:20:48,341 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:20:48,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:20:48,342 INFO L85 PathProgramCache]: Analyzing trace with hash -407573973, now seen corresponding path program 1 times [2022-07-14 06:20:48,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:20:48,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722725584] [2022-07-14 06:20:48,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:20:48,343 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:20:48,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:20:48,344 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:20:48,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-14 06:20:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:20:49,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-14 06:20:49,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:20:49,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 620 proven. 78 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-07-14 06:20:49,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:20:50,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 620 proven. 78 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-07-14 06:20:50,869 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:20:50,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722725584] [2022-07-14 06:20:50,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722725584] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:20:50,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:20:50,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-07-14 06:20:50,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994982065] [2022-07-14 06:20:50,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:20:50,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-14 06:20:50,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:20:50,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-14 06:20:50,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2022-07-14 06:20:50,871 INFO L87 Difference]: Start difference. First operand 251 states and 280 transitions. Second operand has 32 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-14 06:20:54,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:20:54,526 INFO L93 Difference]: Finished difference Result 299 states and 359 transitions. [2022-07-14 06:20:54,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-14 06:20:54,540 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 125 [2022-07-14 06:20:54,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:20:54,545 INFO L225 Difference]: With dead ends: 299 [2022-07-14 06:20:54,545 INFO L226 Difference]: Without dead ends: 289 [2022-07-14 06:20:54,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1195, Invalid=2345, Unknown=0, NotChecked=0, Total=3540 [2022-07-14 06:20:54,547 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 539 mSDsluCounter, 4002 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 4259 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:20:54,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 4259 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-14 06:20:54,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-07-14 06:20:54,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 269. [2022-07-14 06:20:54,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 174 states have (on average 1.603448275862069) internal successors, (279), 254 states have internal predecessors, (279), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-14 06:20:54,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 301 transitions. [2022-07-14 06:20:54,560 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 301 transitions. Word has length 125 [2022-07-14 06:20:54,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:20:54,560 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 301 transitions. [2022-07-14 06:20:54,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-14 06:20:54,561 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 301 transitions. [2022-07-14 06:20:54,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-07-14 06:20:54,562 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:20:54,562 INFO L195 NwaCegarLoop]: trace histogram [66, 6, 6, 6, 6, 6, 6, 6, 6, 1, 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 06:20:54,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-14 06:20:54,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:20:54,779 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:20:54,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:20:54,779 INFO L85 PathProgramCache]: Analyzing trace with hash 401883883, now seen corresponding path program 2 times [2022-07-14 06:20:54,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:20:54,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [114199795] [2022-07-14 06:20:54,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:20:54,780 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:20:54,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:20:54,782 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:20:54,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-14 06:20:56,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:20:56,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:20:56,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-14 06:20:56,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:20:56,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2676 backedges. 1250 proven. 351 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-07-14 06:20:56,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:20:59,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2676 backedges. 1250 proven. 351 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-07-14 06:20:59,025 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:20:59,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [114199795] [2022-07-14 06:20:59,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [114199795] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:20:59,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:20:59,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2022-07-14 06:20:59,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155722249] [2022-07-14 06:20:59,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:20:59,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-14 06:20:59,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:20:59,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-14 06:20:59,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=958, Invalid=2582, Unknown=0, NotChecked=0, Total=3540 [2022-07-14 06:20:59,027 INFO L87 Difference]: Start difference. First operand 269 states and 301 transitions. Second operand has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-14 06:21:13,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:21:13,808 INFO L93 Difference]: Finished difference Result 327 states and 401 transitions. [2022-07-14 06:21:13,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-07-14 06:21:13,809 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 139 [2022-07-14 06:21:13,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:21:13,814 INFO L225 Difference]: With dead ends: 327 [2022-07-14 06:21:13,815 INFO L226 Difference]: Without dead ends: 317 [2022-07-14 06:21:13,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2140 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=3526, Invalid=6980, Unknown=0, NotChecked=0, Total=10506 [2022-07-14 06:21:13,818 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 926 mSDsluCounter, 7920 mSDsCounter, 0 mSdLazyCounter, 1935 mSolverCounterSat, 601 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 8181 SdHoareTripleChecker+Invalid, 2536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 601 IncrementalHoareTripleChecker+Valid, 1935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:21:13,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [926 Valid, 8181 Invalid, 2536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [601 Valid, 1935 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-07-14 06:21:13,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-07-14 06:21:13,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 297. [2022-07-14 06:21:13,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 202 states have (on average 1.5198019801980198) internal successors, (307), 282 states have internal predecessors, (307), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-14 06:21:13,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 329 transitions. [2022-07-14 06:21:13,826 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 329 transitions. Word has length 139 [2022-07-14 06:21:13,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:21:13,827 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 329 transitions. [2022-07-14 06:21:13,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-14 06:21:13,827 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 329 transitions. [2022-07-14 06:21:13,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-07-14 06:21:13,829 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:21:13,829 INFO L195 NwaCegarLoop]: trace histogram [94, 6, 6, 6, 6, 6, 6, 6, 6, 1, 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 06:21:13,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-14 06:21:14,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:21:14,036 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:21:14,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:21:14,037 INFO L85 PathProgramCache]: Analyzing trace with hash 490734699, now seen corresponding path program 3 times [2022-07-14 06:21:14,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:21:14,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440534474] [2022-07-14 06:21:14,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:21:14,037 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:21:14,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:21:14,038 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:21:14,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-14 06:21:14,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-14 06:21:14,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:21:14,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-14 06:21:14,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:21:14,502 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 06:21:17,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:21:17,154 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 12 treesize of output 14 [2022-07-14 06:21:17,180 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:21:17,180 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 12 [2022-07-14 06:21:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5070 backedges. 2365 proven. 502 refuted. 0 times theorem prover too weak. 2203 trivial. 0 not checked. [2022-07-14 06:21:17,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:21:19,608 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:21:19,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [440534474] [2022-07-14 06:21:19,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [440534474] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:21:19,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2127853102] [2022-07-14 06:21:19,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:21:19,608 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:21:19,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:21:19,611 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:21:19,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-07-14 06:21:20,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-14 06:21:20,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:21:20,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-14 06:21:20,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:21:20,207 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 06:21:20,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:21:20,771 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 12 treesize of output 14 [2022-07-14 06:21:20,781 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:21:20,782 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 12 [2022-07-14 06:21:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5070 backedges. 2365 proven. 502 refuted. 0 times theorem prover too weak. 2203 trivial. 0 not checked. [2022-07-14 06:21:20,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:21:23,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2127853102] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:21:23,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:21:23,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2022-07-14 06:21:23,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728479093] [2022-07-14 06:21:23,960 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:21:23,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 06:21:23,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:21:23,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 06:21:23,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=151, Unknown=2, NotChecked=0, Total=182 [2022-07-14 06:21:23,961 INFO L87 Difference]: Start difference. First operand 297 states and 329 transitions. Second operand has 12 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:21:26,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:21:26,549 INFO L93 Difference]: Finished difference Result 432 states and 494 transitions. [2022-07-14 06:21:26,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:21:26,550 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 167 [2022-07-14 06:21:26,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:21:26,552 INFO L225 Difference]: With dead ends: 432 [2022-07-14 06:21:26,552 INFO L226 Difference]: Without dead ends: 432 [2022-07-14 06:21:26,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 322 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=56, Invalid=322, Unknown=2, NotChecked=0, Total=380 [2022-07-14 06:21:26,553 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 225 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 1829 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 2216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 359 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:21:26,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 530 Invalid, 2216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1829 Invalid, 0 Unknown, 359 Unchecked, 2.4s Time] [2022-07-14 06:21:26,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-07-14 06:21:26,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 295. [2022-07-14 06:21:26,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 202 states have (on average 1.50990099009901) internal successors, (305), 280 states have internal predecessors, (305), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-14 06:21:26,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 327 transitions. [2022-07-14 06:21:26,560 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 327 transitions. Word has length 167 [2022-07-14 06:21:26,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:21:26,560 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 327 transitions. [2022-07-14 06:21:26,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 06:21:26,561 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 327 transitions. [2022-07-14 06:21:26,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-07-14 06:21:26,562 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:21:26,562 INFO L195 NwaCegarLoop]: trace histogram [94, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 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 06:21:26,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-07-14 06:21:26,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-14 06:21:26,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:21:26,968 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-14 06:21:26,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:21:26,968 INFO L85 PathProgramCache]: Analyzing trace with hash -850357557, now seen corresponding path program 1 times [2022-07-14 06:21:26,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:21:26,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243857979] [2022-07-14 06:21:26,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:21:26,969 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:21:26,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:21:26,970 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:21:26,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-14 06:21:28,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:21:28,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 1381 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-14 06:21:28,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:21:31,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5070 backedges. 2510 proven. 1485 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-07-14 06:21:31,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:21:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5070 backedges. 2510 proven. 1485 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-07-14 06:21:41,351 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:21:41,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [243857979] [2022-07-14 06:21:41,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [243857979] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:21:41,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:21:41,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 116 [2022-07-14 06:21:41,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471236302] [2022-07-14 06:21:41,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:21:41,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-07-14 06:21:41,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:21:41,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-07-14 06:21:41,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3478, Invalid=9862, Unknown=0, NotChecked=0, Total=13340 [2022-07-14 06:21:41,356 INFO L87 Difference]: Start difference. First operand 295 states and 327 transitions. Second operand has 116 states, 116 states have (on average 1.2758620689655173) internal successors, (148), 116 states have internal predecessors, (148), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7)