./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0235-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0235-2.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 5243781ee83706d005235269371a592cabf9c2dbc613c235cbe81d6e89d326d7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:09:08,636 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:09:08,637 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:09:08,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:09:08,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:09:08,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:09:08,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:09:08,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:09:08,666 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:09:08,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:09:08,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:09:08,669 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:09:08,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:09:08,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:09:08,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:09:08,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:09:08,672 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:09:08,673 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:09:08,674 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:09:08,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:09:08,676 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:09:08,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:09:08,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:09:08,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:09:08,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:09:08,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:09:08,681 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:09:08,681 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:09:08,682 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:09:08,682 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:09:08,683 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:09:08,683 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:09:08,684 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:09:08,684 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:09:08,685 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:09:08,686 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:09:08,686 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:09:08,687 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:09:08,687 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:09:08,687 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:09:08,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:09:08,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:09:08,691 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-21 17:09:08,711 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:09:08,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:09:08,714 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:09:08,714 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:09:08,715 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:09:08,715 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:09:08,716 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:09:08,716 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:09:08,731 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:09:08,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:09:08,731 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:09:08,732 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:09:08,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:09:08,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:09:08,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:09:08,738 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:09:08,738 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:09:08,738 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:09:08,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:09:08,738 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:09:08,738 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:09:08,738 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:09:08,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:09:08,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:09:08,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:09:08,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:09:08,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:09:08,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:09:08,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 17:09:08,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 17:09:08,740 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5243781ee83706d005235269371a592cabf9c2dbc613c235cbe81d6e89d326d7 [2022-07-21 17:09:08,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:09:08,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:09:08,985 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:09:08,986 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:09:08,986 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:09:08,987 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0235-2.i [2022-07-21 17:09:09,033 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b404d7f5d/fa91b9f72a8141589ae76e04cff03242/FLAG22c82bd03 [2022-07-21 17:09:09,477 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:09:09,480 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0235-2.i [2022-07-21 17:09:09,491 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b404d7f5d/fa91b9f72a8141589ae76e04cff03242/FLAG22c82bd03 [2022-07-21 17:09:09,794 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b404d7f5d/fa91b9f72a8141589ae76e04cff03242 [2022-07-21 17:09:09,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:09:09,797 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:09:09,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:09:09,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:09:09,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:09:09,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:09:09" (1/1) ... [2022-07-21 17:09:09,803 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78f6ef32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:09:09, skipping insertion in model container [2022-07-21 17:09:09,803 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:09:09" (1/1) ... [2022-07-21 17:09:09,807 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:09:09,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:09:10,024 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:09:10,031 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 17:09:10,088 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:09:10,113 INFO L208 MainTranslator]: Completed translation [2022-07-21 17:09:10,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:09:10 WrapperNode [2022-07-21 17:09:10,117 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:09:10,117 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 17:09:10,117 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 17:09:10,119 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 17:09:10,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:09:10" (1/1) ... [2022-07-21 17:09:10,135 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:09:10" (1/1) ... [2022-07-21 17:09:10,157 INFO L137 Inliner]: procedures = 188, calls = 71, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 237 [2022-07-21 17:09:10,157 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 17:09:10,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 17:09:10,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 17:09:10,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 17:09:10,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:09:10" (1/1) ... [2022-07-21 17:09:10,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:09:10" (1/1) ... [2022-07-21 17:09:10,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:09:10" (1/1) ... [2022-07-21 17:09:10,174 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:09:10" (1/1) ... [2022-07-21 17:09:10,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:09:10" (1/1) ... [2022-07-21 17:09:10,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:09:10" (1/1) ... [2022-07-21 17:09:10,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:09:10" (1/1) ... [2022-07-21 17:09:10,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 17:09:10,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 17:09:10,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 17:09:10,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 17:09:10,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:09:10" (1/1) ... [2022-07-21 17:09:10,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:09:10,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:09:10,219 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 17:09:10,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 17:09:10,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 17:09:10,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 17:09:10,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 17:09:10,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 17:09:10,242 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2022-07-21 17:09:10,243 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2022-07-21 17:09:10,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 17:09:10,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-21 17:09:10,243 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2022-07-21 17:09:10,243 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2022-07-21 17:09:10,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 17:09:10,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 17:09:10,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 17:09:10,345 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 17:09:10,346 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 17:09:10,807 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 17:09:10,816 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 17:09:10,816 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-07-21 17:09:10,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:09:10 BoogieIcfgContainer [2022-07-21 17:09:10,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 17:09:10,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 17:09:10,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 17:09:10,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 17:09:10,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:09:09" (1/3) ... [2022-07-21 17:09:10,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@104663a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:09:10, skipping insertion in model container [2022-07-21 17:09:10,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:09:10" (2/3) ... [2022-07-21 17:09:10,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@104663a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:09:10, skipping insertion in model container [2022-07-21 17:09:10,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:09:10" (3/3) ... [2022-07-21 17:09:10,825 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0235-2.i [2022-07-21 17:09:10,848 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 17:09:10,848 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 87 error locations. [2022-07-21 17:09:10,878 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 17:09:10,882 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@5a838e8c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@15e5be18 [2022-07-21 17:09:10,882 INFO L358 AbstractCegarLoop]: Starting to check reachability of 87 error locations. [2022-07-21 17:09:10,893 INFO L276 IsEmpty]: Start isEmpty. Operand has 238 states, 136 states have (on average 1.875) internal successors, (255), 223 states have internal predecessors, (255), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-21 17:09:10,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-21 17:09:10,898 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:09:10,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-21 17:09:10,900 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:09:10,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:09:10,904 INFO L85 PathProgramCache]: Analyzing trace with hash 930118, now seen corresponding path program 1 times [2022-07-21 17:09:10,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:09:10,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163051185] [2022-07-21 17:09:10,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:10,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:09:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:09:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:09:10,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:09:10,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163051185] [2022-07-21 17:09:10,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163051185] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:09:10,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:09:10,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:09:11,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968938254] [2022-07-21 17:09:11,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:09:11,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 17:09:11,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:09:11,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 17:09:11,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 17:09:11,044 INFO L87 Difference]: Start difference. First operand has 238 states, 136 states have (on average 1.875) internal successors, (255), 223 states have internal predecessors, (255), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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) [2022-07-21 17:09:11,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:09:11,069 INFO L93 Difference]: Finished difference Result 238 states and 268 transitions. [2022-07-21 17:09:11,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 17:09:11,070 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 [2022-07-21 17:09:11,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:09:11,076 INFO L225 Difference]: With dead ends: 238 [2022-07-21 17:09:11,076 INFO L226 Difference]: Without dead ends: 236 [2022-07-21 17:09:11,077 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 [2022-07-21 17:09:11,079 INFO L413 NwaCegarLoop]: 268 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, 268 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 [2022-07-21 17:09:11,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:09:11,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-07-21 17:09:11,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2022-07-21 17:09:11,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 135 states have (on average 1.7925925925925925) internal successors, (242), 221 states have internal predecessors, (242), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-21 17:09:11,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 266 transitions. [2022-07-21 17:09:11,117 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 266 transitions. Word has length 4 [2022-07-21 17:09:11,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:09:11,117 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 266 transitions. [2022-07-21 17:09:11,117 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) [2022-07-21 17:09:11,117 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 266 transitions. [2022-07-21 17:09:11,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 17:09:11,118 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:09:11,118 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 17:09:11,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 17:09:11,118 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:09:11,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:09:11,119 INFO L85 PathProgramCache]: Analyzing trace with hash 889937946, now seen corresponding path program 1 times [2022-07-21 17:09:11,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:09:11,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683142758] [2022-07-21 17:09:11,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:11,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:09:11,130 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:09:11,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157186112] [2022-07-21 17:09:11,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:11,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:09:11,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:09:11,132 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:09:11,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 17:09:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:09:11,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 17:09:11,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:09:11,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:09:11,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:09:11,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:09:11,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:09:11,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683142758] [2022-07-21 17:09:11,269 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:09:11,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157186112] [2022-07-21 17:09:11,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157186112] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:09:11,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:09:11,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:09:11,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577562876] [2022-07-21 17:09:11,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:09:11,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:09:11,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:09:11,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:09:11,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:09:11,276 INFO L87 Difference]: Start difference. First operand 236 states and 266 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) [2022-07-21 17:09:11,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:09:11,409 INFO L93 Difference]: Finished difference Result 235 states and 265 transitions. [2022-07-21 17:09:11,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:09:11,410 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 [2022-07-21 17:09:11,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:09:11,416 INFO L225 Difference]: With dead ends: 235 [2022-07-21 17:09:11,416 INFO L226 Difference]: Without dead ends: 235 [2022-07-21 17:09:11,416 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 [2022-07-21 17:09:11,418 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 9 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:09:11,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 428 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:09:11,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-07-21 17:09:11,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2022-07-21 17:09:11,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 135 states have (on average 1.7851851851851852) internal successors, (241), 220 states have internal predecessors, (241), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-21 17:09:11,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 265 transitions. [2022-07-21 17:09:11,434 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 265 transitions. Word has length 6 [2022-07-21 17:09:11,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:09:11,434 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 265 transitions. [2022-07-21 17:09:11,435 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) [2022-07-21 17:09:11,435 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 265 transitions. [2022-07-21 17:09:11,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 17:09:11,435 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:09:11,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:09:11,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 17:09:11,635 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 [2022-07-21 17:09:11,636 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:09:11,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:09:11,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1818272976, now seen corresponding path program 1 times [2022-07-21 17:09:11,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:09:11,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119848150] [2022-07-21 17:09:11,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:11,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:09:11,645 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:09:11,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [504411564] [2022-07-21 17:09:11,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:11,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:09:11,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:09:11,651 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:09:11,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 17:09:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:09:11,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 17:09:11,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:09:11,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:09:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:09:11,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:09:11,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:09:11,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119848150] [2022-07-21 17:09:11,848 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:09:11,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504411564] [2022-07-21 17:09:11,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504411564] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:09:11,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:09:11,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:09:11,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519130623] [2022-07-21 17:09:11,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:09:11,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:09:11,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:09:11,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:09:11,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:09:11,849 INFO L87 Difference]: Start difference. First operand 235 states and 265 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) [2022-07-21 17:09:11,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:09:11,855 INFO L93 Difference]: Finished difference Result 234 states and 264 transitions. [2022-07-21 17:09:11,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:09:11,855 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 [2022-07-21 17:09:11,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:09:11,856 INFO L225 Difference]: With dead ends: 234 [2022-07-21 17:09:11,856 INFO L226 Difference]: Without dead ends: 234 [2022-07-21 17:09:11,856 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 [2022-07-21 17:09:11,857 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 0 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:09:11,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 453 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 72 Unchecked, 0.0s Time] [2022-07-21 17:09:11,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-07-21 17:09:11,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2022-07-21 17:09:11,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 135 states have (on average 1.7777777777777777) internal successors, (240), 219 states have internal predecessors, (240), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-21 17:09:11,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 264 transitions. [2022-07-21 17:09:11,869 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 264 transitions. Word has length 7 [2022-07-21 17:09:11,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:09:11,869 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 264 transitions. [2022-07-21 17:09:11,869 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) [2022-07-21 17:09:11,869 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 264 transitions. [2022-07-21 17:09:11,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-21 17:09:11,872 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:09:11,873 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] [2022-07-21 17:09:11,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 17:09:12,073 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 [2022-07-21 17:09:12,073 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:09:12,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:09:12,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1116483670, now seen corresponding path program 1 times [2022-07-21 17:09:12,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:09:12,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255196750] [2022-07-21 17:09:12,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:12,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:09:12,103 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:09:12,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808612235] [2022-07-21 17:09:12,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:12,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:09:12,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:09:12,111 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:09:12,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 17:09:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:09:12,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 17:09:12,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:09:12,421 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:09:12,422 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 [2022-07-21 17:09:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-21 17:09:12,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:09:12,611 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 17:09:12,612 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 [2022-07-21 17:09:12,625 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-21 17:09:12,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:09:12,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255196750] [2022-07-21 17:09:12,625 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:09:12,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808612235] [2022-07-21 17:09:12,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808612235] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:09:12,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:09:12,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2022-07-21 17:09:12,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536550664] [2022-07-21 17:09:12,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:09:12,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 17:09:12,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:09:12,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 17:09:12,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-21 17:09:12,627 INFO L87 Difference]: Start difference. First operand 234 states and 264 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) [2022-07-21 17:09:21,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:09:21,086 INFO L93 Difference]: Finished difference Result 253 states and 288 transitions. [2022-07-21 17:09:21,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 17:09:21,087 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 [2022-07-21 17:09:21,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:09:21,089 INFO L225 Difference]: With dead ends: 253 [2022-07-21 17:09:21,089 INFO L226 Difference]: Without dead ends: 253 [2022-07-21 17:09:21,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2022-07-21 17:09:21,090 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 99 mSDsluCounter, 1529 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1765 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:09:21,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1765 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 669 Invalid, 0 Unknown, 242 Unchecked, 0.3s Time] [2022-07-21 17:09:21,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-07-21 17:09:21,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 243. [2022-07-21 17:09:21,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 144 states have (on average 1.7361111111111112) internal successors, (250), 226 states have internal predecessors, (250), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2022-07-21 17:09:21,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 275 transitions. [2022-07-21 17:09:21,102 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 275 transitions. Word has length 73 [2022-07-21 17:09:21,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:09:21,102 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 275 transitions. [2022-07-21 17:09:21,102 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) [2022-07-21 17:09:21,102 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 275 transitions. [2022-07-21 17:09:21,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-21 17:09:21,103 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:09:21,104 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] [2022-07-21 17:09:21,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 17:09:21,319 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 [2022-07-21 17:09:21,320 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:09:21,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:09:21,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1116483669, now seen corresponding path program 1 times [2022-07-21 17:09:21,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:09:21,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126232042] [2022-07-21 17:09:21,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:21,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:09:21,336 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:09:21,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1052271151] [2022-07-21 17:09:21,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:21,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:09:21,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:09:21,340 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:09:21,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 17:09:21,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:09:21,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-21 17:09:21,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:09:21,482 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 [2022-07-21 17:09:21,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:09:21,872 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 [2022-07-21 17:09:21,880 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:09:21,881 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 [2022-07-21 17:09:21,908 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-21 17:09:21,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:09:21,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:09:21,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126232042] [2022-07-21 17:09:21,990 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:09:21,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052271151] [2022-07-21 17:09:21,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052271151] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:09:21,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:09:21,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-07-21 17:09:21,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126799423] [2022-07-21 17:09:21,990 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 17:09:21,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 17:09:21,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:09:21,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 17:09:21,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-07-21 17:09:21,991 INFO L87 Difference]: Start difference. First operand 243 states and 275 transitions. Second operand has 12 states, 10 states have (on average 3.7) internal successors, (37), 9 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) [2022-07-21 17:09:23,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:09:23,083 INFO L93 Difference]: Finished difference Result 343 states and 394 transitions. [2022-07-21 17:09:23,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 17:09:23,083 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.7) internal successors, (37), 9 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 [2022-07-21 17:09:23,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:09:23,085 INFO L225 Difference]: With dead ends: 343 [2022-07-21 17:09:23,085 INFO L226 Difference]: Without dead ends: 343 [2022-07-21 17:09:23,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-07-21 17:09:23,086 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 112 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 1955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 755 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 17:09:23,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 777 Invalid, 1955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1188 Invalid, 0 Unknown, 755 Unchecked, 0.9s Time] [2022-07-21 17:09:23,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-07-21 17:09:23,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 242. [2022-07-21 17:09:23,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 144 states have (on average 1.7222222222222223) internal successors, (248), 225 states have internal predecessors, (248), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2022-07-21 17:09:23,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 273 transitions. [2022-07-21 17:09:23,098 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 273 transitions. Word has length 73 [2022-07-21 17:09:23,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:09:23,100 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 273 transitions. [2022-07-21 17:09:23,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.7) internal successors, (37), 9 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) [2022-07-21 17:09:23,100 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 273 transitions. [2022-07-21 17:09:23,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-21 17:09:23,105 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:09:23,106 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] [2022-07-21 17:09:23,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 17:09:23,319 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 [2022-07-21 17:09:23,319 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:09:23,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:09:23,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1277004054, now seen corresponding path program 1 times [2022-07-21 17:09:23,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:09:23,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874791632] [2022-07-21 17:09:23,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:23,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:09:23,338 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:09:23,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731322256] [2022-07-21 17:09:23,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:23,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:09:23,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:09:23,343 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:09:23,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 17:09:23,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:09:23,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 17:09:23,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:09:23,597 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:09:23,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-21 17:09:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 73 proven. 9 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-21 17:09:23,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:09:23,748 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 17:09:23,748 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 [2022-07-21 17:09:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 73 proven. 9 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-21 17:09:23,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:09:23,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874791632] [2022-07-21 17:09:23,766 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:09:23,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731322256] [2022-07-21 17:09:23,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731322256] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:09:23,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:09:23,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2022-07-21 17:09:23,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038478404] [2022-07-21 17:09:23,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:09:23,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 17:09:23,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:09:23,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 17:09:23,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-21 17:09:23,768 INFO L87 Difference]: Start difference. First operand 242 states and 273 transitions. Second operand has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 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) [2022-07-21 17:09:32,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:09:32,167 INFO L93 Difference]: Finished difference Result 256 states and 291 transitions. [2022-07-21 17:09:32,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 17:09:32,168 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 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 74 [2022-07-21 17:09:32,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:09:32,169 INFO L225 Difference]: With dead ends: 256 [2022-07-21 17:09:32,169 INFO L226 Difference]: Without dead ends: 256 [2022-07-21 17:09:32,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 133 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-07-21 17:09:32,169 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 107 mSDsluCounter, 1365 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 1600 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:09:32,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 1600 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 656 Invalid, 0 Unknown, 145 Unchecked, 0.3s Time] [2022-07-21 17:09:32,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-07-21 17:09:32,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 240. [2022-07-21 17:09:32,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 143 states have (on average 1.7202797202797202) internal successors, (246), 224 states have internal predecessors, (246), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-21 17:09:32,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 270 transitions. [2022-07-21 17:09:32,175 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 270 transitions. Word has length 74 [2022-07-21 17:09:32,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:09:32,177 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 270 transitions. [2022-07-21 17:09:32,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 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) [2022-07-21 17:09:32,177 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 270 transitions. [2022-07-21 17:09:32,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-21 17:09:32,178 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:09:32,178 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] [2022-07-21 17:09:32,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 17:09:32,396 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 [2022-07-21 17:09:32,396 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:09:32,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:09:32,397 INFO L85 PathProgramCache]: Analyzing trace with hash 801017355, now seen corresponding path program 1 times [2022-07-21 17:09:32,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:09:32,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54478429] [2022-07-21 17:09:32,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:32,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:09:32,411 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:09:32,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [640279006] [2022-07-21 17:09:32,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:32,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:09:32,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:09:32,418 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:09:32,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 17:09:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:09:32,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-21 17:09:32,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:09:32,667 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:09:32,668 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 [2022-07-21 17:09:32,723 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:09:32,724 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 [2022-07-21 17:09:32,736 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-21 17:09:32,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:09:32,982 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 17:09:32,982 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 [2022-07-21 17:09:32,992 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-21 17:09:32,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:09:32,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54478429] [2022-07-21 17:09:32,992 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:09:32,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640279006] [2022-07-21 17:09:32,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640279006] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:09:32,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:09:32,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2022-07-21 17:09:32,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696022254] [2022-07-21 17:09:32,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:09:32,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 17:09:32,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:09:32,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 17:09:32,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:09:32,995 INFO L87 Difference]: Start difference. First operand 240 states and 270 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) [2022-07-21 17:09:33,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:09:33,474 INFO L93 Difference]: Finished difference Result 406 states and 471 transitions. [2022-07-21 17:09:33,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 17:09:33,475 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 [2022-07-21 17:09:33,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:09:33,477 INFO L225 Difference]: With dead ends: 406 [2022-07-21 17:09:33,477 INFO L226 Difference]: Without dead ends: 406 [2022-07-21 17:09:33,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 131 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-07-21 17:09:33,478 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 299 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 2009 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:09:33,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 2009 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1003 Invalid, 0 Unknown, 311 Unchecked, 0.4s Time] [2022-07-21 17:09:33,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-07-21 17:09:33,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 264. [2022-07-21 17:09:33,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 164 states have (on average 1.6402439024390243) internal successors, (269), 244 states have internal predecessors, (269), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-21 17:09:33,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 297 transitions. [2022-07-21 17:09:33,487 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 297 transitions. Word has length 75 [2022-07-21 17:09:33,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:09:33,489 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 297 transitions. [2022-07-21 17:09:33,489 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) [2022-07-21 17:09:33,489 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 297 transitions. [2022-07-21 17:09:33,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-21 17:09:33,493 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:09:33,493 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] [2022-07-21 17:09:33,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 17:09:33,703 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 [2022-07-21 17:09:33,704 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:09:33,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:09:33,704 INFO L85 PathProgramCache]: Analyzing trace with hash 801017356, now seen corresponding path program 1 times [2022-07-21 17:09:33,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:09:33,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875842035] [2022-07-21 17:09:33,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:33,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:09:33,716 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:09:33,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251303268] [2022-07-21 17:09:33,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:33,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:09:33,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:09:33,732 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:09:33,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 17:09:33,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:09:33,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-21 17:09:33,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:09:33,884 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 [2022-07-21 17:09:34,380 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 17:09:34,380 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 [2022-07-21 17:09:34,384 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 [2022-07-21 17:09:34,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:09:34,516 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 [2022-07-21 17:09:34,531 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-21 17:09:34,531 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 [2022-07-21 17:09:34,581 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-21 17:09:34,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:09:34,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:09:34,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875842035] [2022-07-21 17:09:34,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:09:34,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251303268] [2022-07-21 17:09:34,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251303268] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:09:34,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:09:34,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-07-21 17:09:34,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681996196] [2022-07-21 17:09:34,675 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 17:09:34,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 17:09:34,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:09:34,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 17:09:34,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-07-21 17:09:34,675 INFO L87 Difference]: Start difference. First operand 264 states and 297 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) [2022-07-21 17:09:35,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:09:35,850 INFO L93 Difference]: Finished difference Result 365 states and 417 transitions. [2022-07-21 17:09:35,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 17:09:35,850 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 [2022-07-21 17:09:35,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:09:35,852 INFO L225 Difference]: With dead ends: 365 [2022-07-21 17:09:35,852 INFO L226 Difference]: Without dead ends: 365 [2022-07-21 17:09:35,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-07-21 17:09:35,852 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 114 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 2183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 988 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:09:35,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 828 Invalid, 2183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1182 Invalid, 0 Unknown, 988 Unchecked, 1.0s Time] [2022-07-21 17:09:35,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-07-21 17:09:35,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 264. [2022-07-21 17:09:35,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 164 states have (on average 1.6341463414634145) internal successors, (268), 244 states have internal predecessors, (268), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-21 17:09:35,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 296 transitions. [2022-07-21 17:09:35,859 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 296 transitions. Word has length 75 [2022-07-21 17:09:35,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:09:35,859 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 296 transitions. [2022-07-21 17:09:35,859 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) [2022-07-21 17:09:35,859 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 296 transitions. [2022-07-21 17:09:35,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-21 17:09:35,859 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:09:35,859 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] [2022-07-21 17:09:35,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 17:09:36,075 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 [2022-07-21 17:09:36,075 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:09:36,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:09:36,076 INFO L85 PathProgramCache]: Analyzing trace with hash -938265759, now seen corresponding path program 1 times [2022-07-21 17:09:36,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:09:36,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428111308] [2022-07-21 17:09:36,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:36,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:09:36,087 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:09:36,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1022539190] [2022-07-21 17:09:36,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:36,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:09:36,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:09:36,089 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:09:36,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 17:09:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:09:36,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 17:09:36,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:09:36,250 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-21 17:09:36,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:09:36,274 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 [2022-07-21 17:09:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-21 17:09:36,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:09:36,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428111308] [2022-07-21 17:09:36,335 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:09:36,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022539190] [2022-07-21 17:09:36,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022539190] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:09:36,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:09:36,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-21 17:09:36,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497366586] [2022-07-21 17:09:36,335 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:09:36,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:09:36,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:09:36,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:09:36,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:09:36,341 INFO L87 Difference]: Start difference. First operand 264 states and 296 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) [2022-07-21 17:09:36,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:09:36,514 INFO L93 Difference]: Finished difference Result 282 states and 321 transitions. [2022-07-21 17:09:36,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 17:09:36,515 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 [2022-07-21 17:09:36,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:09:36,516 INFO L225 Difference]: With dead ends: 282 [2022-07-21 17:09:36,516 INFO L226 Difference]: Without dead ends: 282 [2022-07-21 17:09:36,516 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 [2022-07-21 17:09:36,517 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 317 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1520 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:09:36,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 1520 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:09:36,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-07-21 17:09:36,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 263. [2022-07-21 17:09:36,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 164 states have (on average 1.6280487804878048) internal successors, (267), 243 states have internal predecessors, (267), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-21 17:09:36,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 295 transitions. [2022-07-21 17:09:36,522 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 295 transitions. Word has length 76 [2022-07-21 17:09:36,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:09:36,522 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 295 transitions. [2022-07-21 17:09:36,522 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) [2022-07-21 17:09:36,523 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 295 transitions. [2022-07-21 17:09:36,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-21 17:09:36,523 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:09:36,523 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] [2022-07-21 17:09:36,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 17:09:36,740 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 [2022-07-21 17:09:36,740 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:09:36,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:09:36,741 INFO L85 PathProgramCache]: Analyzing trace with hash 269737250, now seen corresponding path program 1 times [2022-07-21 17:09:36,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:09:36,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625260915] [2022-07-21 17:09:36,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:36,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:09:36,755 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:09:36,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [232476796] [2022-07-21 17:09:36,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:36,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:09:36,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:09:36,764 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:09:36,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 17:09:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:09:36,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 17:09:36,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:09:36,902 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-21 17:09:36,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:09:36,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:09:36,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625260915] [2022-07-21 17:09:36,902 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:09:36,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232476796] [2022-07-21 17:09:36,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232476796] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:09:36,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:09:36,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:09:36,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700148099] [2022-07-21 17:09:36,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:09:36,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:09:36,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:09:36,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:09:36,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:09:36,906 INFO L87 Difference]: Start difference. First operand 263 states and 295 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) [2022-07-21 17:09:36,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:09:36,991 INFO L93 Difference]: Finished difference Result 270 states and 306 transitions. [2022-07-21 17:09:36,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:09:36,991 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 [2022-07-21 17:09:36,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:09:36,993 INFO L225 Difference]: With dead ends: 270 [2022-07-21 17:09:36,993 INFO L226 Difference]: Without dead ends: 270 [2022-07-21 17:09:36,993 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 [2022-07-21 17:09:36,993 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 94 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:09:36,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 357 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:09:36,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-07-21 17:09:36,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 262. [2022-07-21 17:09:36,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 164 states have (on average 1.6219512195121952) internal successors, (266), 242 states have internal predecessors, (266), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-21 17:09:36,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 294 transitions. [2022-07-21 17:09:36,999 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 294 transitions. Word has length 78 [2022-07-21 17:09:36,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:09:36,999 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 294 transitions. [2022-07-21 17:09:36,999 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) [2022-07-21 17:09:36,999 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 294 transitions. [2022-07-21 17:09:37,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-21 17:09:37,000 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:09:37,000 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] [2022-07-21 17:09:37,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 17:09:37,215 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 [2022-07-21 17:09:37,215 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:09:37,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:09:37,216 INFO L85 PathProgramCache]: Analyzing trace with hash -88647287, now seen corresponding path program 1 times [2022-07-21 17:09:37,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:09:37,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596693128] [2022-07-21 17:09:37,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:37,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:09:37,233 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:09:37,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [903484489] [2022-07-21 17:09:37,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:37,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:09:37,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:09:37,236 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:09:37,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 17:09:37,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:09:37,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-21 17:09:37,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:09:37,447 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 17:09:37,448 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 [2022-07-21 17:09:37,486 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 17:09:37,487 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 [2022-07-21 17:09:37,563 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:09:37,564 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 [2022-07-21 17:09:37,582 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 73 proven. 40 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 17:09:37,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:09:37,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:09:37,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596693128] [2022-07-21 17:09:37,738 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:09:37,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903484489] [2022-07-21 17:09:37,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903484489] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:09:37,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:09:37,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-07-21 17:09:37,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155490731] [2022-07-21 17:09:37,739 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 17:09:37,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 17:09:37,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:09:37,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 17:09:37,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-07-21 17:09:37,740 INFO L87 Difference]: Start difference. First operand 262 states and 294 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) [2022-07-21 17:09:42,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:09:42,179 INFO L93 Difference]: Finished difference Result 330 states and 376 transitions. [2022-07-21 17:09:42,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 17:09:42,180 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 [2022-07-21 17:09:42,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:09:42,181 INFO L225 Difference]: With dead ends: 330 [2022-07-21 17:09:42,181 INFO L226 Difference]: Without dead ends: 330 [2022-07-21 17:09:42,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2022-07-21 17:09:42,182 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 123 mSDsluCounter, 1772 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 2002 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 368 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:09:42,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 2002 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 757 Invalid, 0 Unknown, 368 Unchecked, 0.3s Time] [2022-07-21 17:09:42,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-07-21 17:09:42,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 321. [2022-07-21 17:09:42,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 215 states have (on average 1.5069767441860464) internal successors, (324), 292 states have internal predecessors, (324), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (24), 19 states have call predecessors, (24), 19 states have call successors, (24) [2022-07-21 17:09:42,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 367 transitions. [2022-07-21 17:09:42,188 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 367 transitions. Word has length 82 [2022-07-21 17:09:42,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:09:42,188 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 367 transitions. [2022-07-21 17:09:42,189 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) [2022-07-21 17:09:42,189 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 367 transitions. [2022-07-21 17:09:42,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-21 17:09:42,189 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:09:42,189 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] [2022-07-21 17:09:42,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 17:09:42,401 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 [2022-07-21 17:09:42,402 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:09:42,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:09:42,402 INFO L85 PathProgramCache]: Analyzing trace with hash -88647286, now seen corresponding path program 1 times [2022-07-21 17:09:42,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:09:42,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258933257] [2022-07-21 17:09:42,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:42,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:09:42,423 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:09:42,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414459187] [2022-07-21 17:09:42,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:42,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:09:42,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:09:42,424 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:09:42,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 17:09:42,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:09:42,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-21 17:09:42,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:09:42,614 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 [2022-07-21 17:09:43,100 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 17:09:43,100 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 [2022-07-21 17:09:43,104 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 [2022-07-21 17:09:43,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:09:43,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-21 17:09:43,291 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-21 17:09:43,292 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 [2022-07-21 17:09:43,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:09:43,442 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 [2022-07-21 17:09:43,461 INFO L356 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-07-21 17:09:43,461 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 [2022-07-21 17:09:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 73 proven. 40 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 17:09:43,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:09:43,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:09:43,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258933257] [2022-07-21 17:09:43,708 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:09:43,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414459187] [2022-07-21 17:09:43,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414459187] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:09:43,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:09:43,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-07-21 17:09:43,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45498138] [2022-07-21 17:09:43,708 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 17:09:43,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 17:09:43,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:09:43,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 17:09:43,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-07-21 17:09:43,709 INFO L87 Difference]: Start difference. First operand 321 states and 367 transitions. Second operand has 17 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:09:45,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:09:45,162 INFO L93 Difference]: Finished difference Result 466 states and 540 transitions. [2022-07-21 17:09:45,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 17:09:45,163 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 82 [2022-07-21 17:09:45,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:09:45,164 INFO L225 Difference]: With dead ends: 466 [2022-07-21 17:09:45,165 INFO L226 Difference]: Without dead ends: 466 [2022-07-21 17:09:45,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-07-21 17:09:45,165 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 121 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 2293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1146 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:09:45,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 855 Invalid, 2293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1133 Invalid, 0 Unknown, 1146 Unchecked, 1.1s Time] [2022-07-21 17:09:45,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-07-21 17:09:45,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 343. [2022-07-21 17:09:45,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 235 states have (on average 1.476595744680851) internal successors, (347), 311 states have internal predecessors, (347), 21 states have call successors, (21), 9 states have call predecessors, (21), 9 states have return successors, (26), 22 states have call predecessors, (26), 21 states have call successors, (26) [2022-07-21 17:09:45,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 394 transitions. [2022-07-21 17:09:45,173 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 394 transitions. Word has length 82 [2022-07-21 17:09:45,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:09:45,174 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 394 transitions. [2022-07-21 17:09:45,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:09:45,174 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 394 transitions. [2022-07-21 17:09:45,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-21 17:09:45,174 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:09:45,174 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] [2022-07-21 17:09:45,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 17:09:45,392 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 [2022-07-21 17:09:45,393 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:09:45,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:09:45,393 INFO L85 PathProgramCache]: Analyzing trace with hash -927383707, now seen corresponding path program 1 times [2022-07-21 17:09:45,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:09:45,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942501223] [2022-07-21 17:09:45,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:45,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:09:45,409 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:09:45,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974861165] [2022-07-21 17:09:45,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:45,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:09:45,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:09:45,411 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) [2022-07-21 17:09:45,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 17:09:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:09:45,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-21 17:09:45,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:09:45,648 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 17:09:45,649 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 [2022-07-21 17:09:45,739 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:09:45,739 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 [2022-07-21 17:09:45,843 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:09:45,843 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 [2022-07-21 17:09:45,895 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 75 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:09:45,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:09:46,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:09:46,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942501223] [2022-07-21 17:09:46,355 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:09:46,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974861165] [2022-07-21 17:09:46,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974861165] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:09:46,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:09:46,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-07-21 17:09:46,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126939965] [2022-07-21 17:09:46,355 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 17:09:46,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 17:09:46,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:09:46,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 17:09:46,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-07-21 17:09:46,357 INFO L87 Difference]: Start difference. First operand 343 states and 394 transitions. Second operand has 21 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 17 states have internal predecessors, (63), 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) [2022-07-21 17:09:50,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:09:50,929 INFO L93 Difference]: Finished difference Result 402 states and 458 transitions. [2022-07-21 17:09:50,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 17:09:50,929 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 17 states have internal predecessors, (63), 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 83 [2022-07-21 17:09:50,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:09:50,930 INFO L225 Difference]: With dead ends: 402 [2022-07-21 17:09:50,930 INFO L226 Difference]: Without dead ends: 402 [2022-07-21 17:09:50,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 87 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2022-07-21 17:09:50,931 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 214 mSDsluCounter, 2639 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 2868 SdHoareTripleChecker+Invalid, 1769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 924 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:09:50,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 2868 Invalid, 1769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 839 Invalid, 0 Unknown, 924 Unchecked, 0.3s Time] [2022-07-21 17:09:50,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-07-21 17:09:50,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 328. [2022-07-21 17:09:50,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 222 states have (on average 1.4954954954954955) internal successors, (332), 299 states have internal predecessors, (332), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-21 17:09:50,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 370 transitions. [2022-07-21 17:09:50,938 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 370 transitions. Word has length 83 [2022-07-21 17:09:50,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:09:50,938 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 370 transitions. [2022-07-21 17:09:50,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 17 states have internal predecessors, (63), 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) [2022-07-21 17:09:50,939 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 370 transitions. [2022-07-21 17:09:50,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-21 17:09:50,939 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:09:50,939 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] [2022-07-21 17:09:50,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 17:09:51,156 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 [2022-07-21 17:09:51,156 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:09:51,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:09:51,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1546901432, now seen corresponding path program 1 times [2022-07-21 17:09:51,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:09:51,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902819841] [2022-07-21 17:09:51,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:51,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:09:51,173 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:09:51,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1842225956] [2022-07-21 17:09:51,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:51,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:09:51,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:09:51,177 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) [2022-07-21 17:09:51,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 17:09:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:09:51,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 17:09:51,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:09:51,360 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-21 17:09:51,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:09:51,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:09:51,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902819841] [2022-07-21 17:09:51,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:09:51,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842225956] [2022-07-21 17:09:51,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842225956] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:09:51,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:09:51,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:09:51,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126177278] [2022-07-21 17:09:51,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:09:51,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:09:51,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:09:51,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:09:51,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:09:51,362 INFO L87 Difference]: Start difference. First operand 328 states and 370 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) [2022-07-21 17:09:51,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:09:51,456 INFO L93 Difference]: Finished difference Result 341 states and 388 transitions. [2022-07-21 17:09:51,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:09:51,457 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 [2022-07-21 17:09:51,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:09:51,458 INFO L225 Difference]: With dead ends: 341 [2022-07-21 17:09:51,458 INFO L226 Difference]: Without dead ends: 341 [2022-07-21 17:09:51,458 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 [2022-07-21 17:09:51,459 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 161 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:09:51,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 527 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:09:51,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-07-21 17:09:51,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 327. [2022-07-21 17:09:51,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 222 states have (on average 1.490990990990991) internal successors, (331), 298 states have internal predecessors, (331), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-21 17:09:51,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 369 transitions. [2022-07-21 17:09:51,467 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 369 transitions. Word has length 83 [2022-07-21 17:09:51,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:09:51,467 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 369 transitions. [2022-07-21 17:09:51,467 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) [2022-07-21 17:09:51,467 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 369 transitions. [2022-07-21 17:09:51,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-21 17:09:51,468 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:09:51,468 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] [2022-07-21 17:09:51,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 17:09:51,679 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 [2022-07-21 17:09:51,679 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:09:51,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:09:51,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1546901433, now seen corresponding path program 1 times [2022-07-21 17:09:51,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:09:51,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727348647] [2022-07-21 17:09:51,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:51,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:09:51,692 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:09:51,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245993636] [2022-07-21 17:09:51,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:51,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:09:51,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:09:51,694 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) [2022-07-21 17:09:51,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 17:09:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:09:51,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-21 17:09:51,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:09:51,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:09:51,855 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 [2022-07-21 17:09:52,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:09:52,735 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 [2022-07-21 17:09:52,751 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 17:09:52,751 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 [2022-07-21 17:09:53,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:09:53,164 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 [2022-07-21 17:09:53,179 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-21 17:09:53,180 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 [2022-07-21 17:09:54,234 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-21 17:09:54,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:09:54,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:09:54,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727348647] [2022-07-21 17:09:54,518 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:09:54,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245993636] [2022-07-21 17:09:54,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245993636] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:09:54,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:09:54,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-07-21 17:09:54,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834290231] [2022-07-21 17:09:54,519 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 17:09:54,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 17:09:54,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:09:54,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 17:09:54,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-07-21 17:09:54,519 INFO L87 Difference]: Start difference. First operand 327 states and 369 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) [2022-07-21 17:09:55,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:09:55,068 INFO L93 Difference]: Finished difference Result 510 states and 596 transitions. [2022-07-21 17:09:55,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 17:09:55,069 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 [2022-07-21 17:09:55,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:09:55,070 INFO L225 Difference]: With dead ends: 510 [2022-07-21 17:09:55,070 INFO L226 Difference]: Without dead ends: 510 [2022-07-21 17:09:55,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-07-21 17:09:55,071 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 115 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 2330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2095 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:09:55,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 953 Invalid, 2330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 223 Invalid, 0 Unknown, 2095 Unchecked, 0.2s Time] [2022-07-21 17:09:55,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-07-21 17:09:55,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 382. [2022-07-21 17:09:55,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 269 states have (on average 1.4349442379182156) internal successors, (386), 347 states have internal predecessors, (386), 23 states have call successors, (23), 9 states have call predecessors, (23), 13 states have return successors, (36), 25 states have call predecessors, (36), 23 states have call successors, (36) [2022-07-21 17:09:55,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 445 transitions. [2022-07-21 17:09:55,079 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 445 transitions. Word has length 83 [2022-07-21 17:09:55,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:09:55,079 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 445 transitions. [2022-07-21 17:09:55,079 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) [2022-07-21 17:09:55,079 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 445 transitions. [2022-07-21 17:09:55,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-21 17:09:55,080 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:09:55,080 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] [2022-07-21 17:09:55,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 17:09:55,299 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 [2022-07-21 17:09:55,300 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:09:55,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:09:55,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1315876189, now seen corresponding path program 1 times [2022-07-21 17:09:55,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:09:55,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538446033] [2022-07-21 17:09:55,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:55,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:09:55,315 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:09:55,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026517818] [2022-07-21 17:09:55,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:09:55,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:09:55,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:09:55,333 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) [2022-07-21 17:09:55,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 17:09:55,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:09:55,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-21 17:09:55,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:09:55,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:09:55,516 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 [2022-07-21 17:10:03,381 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 17:10:03,382 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 [2022-07-21 17:10:03,447 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 23 treesize of output 25 [2022-07-21 17:10:05,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:10:05,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2022-07-21 17:10:05,383 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:10:05,383 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 [2022-07-21 17:10:08,834 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 83 proven. 27 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-21 17:10:08,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:10:09,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:10:09,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538446033] [2022-07-21 17:10:09,734 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:10:09,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026517818] [2022-07-21 17:10:09,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026517818] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:10:09,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:10:09,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-07-21 17:10:09,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059832861] [2022-07-21 17:10:09,735 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 17:10:09,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 17:10:09,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:10:09,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 17:10:09,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2022-07-21 17:10:09,735 INFO L87 Difference]: Start difference. First operand 382 states and 445 transitions. Second operand has 22 states, 20 states have (on average 2.8) internal successors, (56), 19 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) [2022-07-21 17:10:16,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:10:16,087 INFO L93 Difference]: Finished difference Result 648 states and 787 transitions. [2022-07-21 17:10:16,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 17:10:16,087 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.8) internal successors, (56), 19 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 [2022-07-21 17:10:16,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:10:16,089 INFO L225 Difference]: With dead ends: 648 [2022-07-21 17:10:16,089 INFO L226 Difference]: Without dead ends: 648 [2022-07-21 17:10:16,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-07-21 17:10:16,090 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 172 mSDsluCounter, 1628 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 1895 SdHoareTripleChecker+Invalid, 3743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3502 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:10:16,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 1895 Invalid, 3743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 229 Invalid, 0 Unknown, 3502 Unchecked, 0.2s Time] [2022-07-21 17:10:16,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-07-21 17:10:16,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 394. [2022-07-21 17:10:16,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 279 states have (on average 1.4265232974910393) internal successors, (398), 359 states have internal predecessors, (398), 23 states have call successors, (23), 9 states have call predecessors, (23), 15 states have return successors, (45), 25 states have call predecessors, (45), 23 states have call successors, (45) [2022-07-21 17:10:16,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 466 transitions. [2022-07-21 17:10:16,108 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 466 transitions. Word has length 84 [2022-07-21 17:10:16,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:10:16,108 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 466 transitions. [2022-07-21 17:10:16,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.8) internal successors, (56), 19 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) [2022-07-21 17:10:16,109 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 466 transitions. [2022-07-21 17:10:16,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-21 17:10:16,109 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:10:16,109 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] [2022-07-21 17:10:16,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 17:10:16,325 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 [2022-07-21 17:10:16,325 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:10:16,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:10:16,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1220193167, now seen corresponding path program 2 times [2022-07-21 17:10:16,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:10:16,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600985061] [2022-07-21 17:10:16,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:10:16,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:10:16,336 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:10:16,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188956220] [2022-07-21 17:10:16,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:10:16,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:10:16,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:10:16,337 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) [2022-07-21 17:10:16,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 17:10:16,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:10:16,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:10:16,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-21 17:10:16,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:10:16,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:10:16,510 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 [2022-07-21 17:10:17,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:10:17,525 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 [2022-07-21 17:10:17,543 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 17:10:17,543 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 [2022-07-21 17:10:17,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:10:17,928 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 [2022-07-21 17:10:17,943 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-21 17:10:17,944 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 [2022-07-21 17:10:18,896 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 83 proven. 27 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-21 17:10:18,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:10:19,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:10:19,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600985061] [2022-07-21 17:10:19,131 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:10:19,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188956220] [2022-07-21 17:10:19,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188956220] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:10:19,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:10:19,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-07-21 17:10:19,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35973386] [2022-07-21 17:10:19,131 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 17:10:19,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 17:10:19,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:10:19,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 17:10:19,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-07-21 17:10:19,132 INFO L87 Difference]: Start difference. First operand 394 states and 466 transitions. Second operand has 20 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 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) [2022-07-21 17:10:19,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:10:19,697 INFO L93 Difference]: Finished difference Result 615 states and 743 transitions. [2022-07-21 17:10:19,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 17:10:19,698 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 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 [2022-07-21 17:10:19,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:10:19,699 INFO L225 Difference]: With dead ends: 615 [2022-07-21 17:10:19,699 INFO L226 Difference]: Without dead ends: 615 [2022-07-21 17:10:19,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-07-21 17:10:19,700 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 115 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 2177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1942 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:10:19,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 873 Invalid, 2177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 223 Invalid, 0 Unknown, 1942 Unchecked, 0.2s Time] [2022-07-21 17:10:19,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-07-21 17:10:19,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 416. [2022-07-21 17:10:19,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 295 states have (on average 1.4101694915254237) internal successors, (416), 377 states have internal predecessors, (416), 27 states have call successors, (27), 9 states have call predecessors, (27), 17 states have return successors, (61), 29 states have call predecessors, (61), 27 states have call successors, (61) [2022-07-21 17:10:19,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 504 transitions. [2022-07-21 17:10:19,710 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 504 transitions. Word has length 84 [2022-07-21 17:10:19,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:10:19,710 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 504 transitions. [2022-07-21 17:10:19,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 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) [2022-07-21 17:10:19,710 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 504 transitions. [2022-07-21 17:10:19,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-21 17:10:19,711 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:10:19,711 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] [2022-07-21 17:10:19,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 17:10:19,927 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 [2022-07-21 17:10:19,927 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:10:19,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:10:19,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1550939079, now seen corresponding path program 3 times [2022-07-21 17:10:19,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:10:19,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119229762] [2022-07-21 17:10:19,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:10:19,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:10:19,938 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:10:19,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781124660] [2022-07-21 17:10:19,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:10:19,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:10:19,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:10:19,939 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) [2022-07-21 17:10:19,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 17:10:20,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 17:10:20,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:10:20,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 17:10:20,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:10:20,111 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-07-21 17:10:20,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:10:20,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:10:20,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119229762] [2022-07-21 17:10:20,111 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:10:20,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781124660] [2022-07-21 17:10:20,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781124660] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:10:20,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:10:20,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:10:20,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859877649] [2022-07-21 17:10:20,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:10:20,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:10:20,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:10:20,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:10:20,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:10:20,113 INFO L87 Difference]: Start difference. First operand 416 states and 504 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) [2022-07-21 17:10:20,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:10:20,154 INFO L93 Difference]: Finished difference Result 405 states and 460 transitions. [2022-07-21 17:10:20,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:10:20,154 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 [2022-07-21 17:10:20,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:10:20,155 INFO L225 Difference]: With dead ends: 405 [2022-07-21 17:10:20,155 INFO L226 Difference]: Without dead ends: 365 [2022-07-21 17:10:20,155 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 [2022-07-21 17:10:20,156 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 12 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:10:20,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 962 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:10:20,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-07-21 17:10:20,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 335. [2022-07-21 17:10:20,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 230 states have (on average 1.4739130434782608) internal successors, (339), 306 states have internal predecessors, (339), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-21 17:10:20,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 377 transitions. [2022-07-21 17:10:20,175 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 377 transitions. Word has length 85 [2022-07-21 17:10:20,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:10:20,175 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 377 transitions. [2022-07-21 17:10:20,175 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) [2022-07-21 17:10:20,175 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 377 transitions. [2022-07-21 17:10:20,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-21 17:10:20,180 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:10:20,180 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] [2022-07-21 17:10:20,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 17:10:20,401 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 [2022-07-21 17:10:20,402 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:10:20,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:10:20,402 INFO L85 PathProgramCache]: Analyzing trace with hash 109000903, now seen corresponding path program 4 times [2022-07-21 17:10:20,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:10:20,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229450368] [2022-07-21 17:10:20,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:10:20,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:10:20,416 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:10:20,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1289282152] [2022-07-21 17:10:20,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 17:10:20,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:10:20,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:10:20,417 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) [2022-07-21 17:10:20,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 17:10:20,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 17:10:20,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:10:20,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-21 17:10:20,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:10:20,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:10:20,787 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 [2022-07-21 17:10:20,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:10:21,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:10:21,491 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 [2022-07-21 17:10:21,507 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 17:10:21,507 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 [2022-07-21 17:10:21,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:10:21,711 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 [2022-07-21 17:10:21,721 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:10:21,721 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 [2022-07-21 17:10:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 100 proven. 49 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-21 17:10:22,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:10:22,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:10:22,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229450368] [2022-07-21 17:10:22,696 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:10:22,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289282152] [2022-07-21 17:10:22,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289282152] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:10:22,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:10:22,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-07-21 17:10:22,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937309254] [2022-07-21 17:10:22,697 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 17:10:22,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 17:10:22,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:10:22,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 17:10:22,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2022-07-21 17:10:22,698 INFO L87 Difference]: Start difference. First operand 335 states and 377 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) [2022-07-21 17:10:23,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:10:23,701 INFO L93 Difference]: Finished difference Result 518 states and 604 transitions. [2022-07-21 17:10:23,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 17:10:23,702 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 [2022-07-21 17:10:23,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:10:23,703 INFO L225 Difference]: With dead ends: 518 [2022-07-21 17:10:23,703 INFO L226 Difference]: Without dead ends: 518 [2022-07-21 17:10:23,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2022-07-21 17:10:23,704 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 114 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1113 SdHoareTripleChecker+Invalid, 2592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2228 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:10:23,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1113 Invalid, 2592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 352 Invalid, 0 Unknown, 2228 Unchecked, 0.3s Time] [2022-07-21 17:10:23,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-07-21 17:10:23,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 378. [2022-07-21 17:10:23,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 267 states have (on average 1.4307116104868913) internal successors, (382), 343 states have internal predecessors, (382), 23 states have call successors, (23), 9 states have call predecessors, (23), 11 states have return successors, (32), 25 states have call predecessors, (32), 23 states have call successors, (32) [2022-07-21 17:10:23,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 437 transitions. [2022-07-21 17:10:23,710 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 437 transitions. Word has length 89 [2022-07-21 17:10:23,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:10:23,711 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 437 transitions. [2022-07-21 17:10:23,711 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) [2022-07-21 17:10:23,711 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 437 transitions. [2022-07-21 17:10:23,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-21 17:10:23,713 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:10:23,713 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] [2022-07-21 17:10:23,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-21 17:10:23,913 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 [2022-07-21 17:10:23,913 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:10:23,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:10:23,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1896002525, now seen corresponding path program 5 times [2022-07-21 17:10:23,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:10:23,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882508161] [2022-07-21 17:10:23,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:10:23,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:10:23,925 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:10:23,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1468302207] [2022-07-21 17:10:23,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 17:10:23,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:10:23,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:10:23,927 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) [2022-07-21 17:10:23,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 17:10:24,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:10:24,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:10:24,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 17:10:24,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:10:24,070 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 111 proven. 1 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-21 17:10:24,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:10:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 11 proven. 47 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-07-21 17:10:24,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:10:24,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882508161] [2022-07-21 17:10:24,198 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:10:24,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468302207] [2022-07-21 17:10:24,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468302207] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:10:24,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:10:24,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-21 17:10:24,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651407008] [2022-07-21 17:10:24,198 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:10:24,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:10:24,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:10:24,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:10:24,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:10:24,199 INFO L87 Difference]: Start difference. First operand 378 states and 437 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) [2022-07-21 17:10:24,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:10:24,323 INFO L93 Difference]: Finished difference Result 411 states and 457 transitions. [2022-07-21 17:10:24,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 17:10:24,324 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 [2022-07-21 17:10:24,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:10:24,324 INFO L225 Difference]: With dead ends: 411 [2022-07-21 17:10:24,324 INFO L226 Difference]: Without dead ends: 351 [2022-07-21 17:10:24,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-07-21 17:10:24,325 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 51 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:10:24,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1449 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:10:24,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-07-21 17:10:24,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2022-07-21 17:10:24,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 246 states have (on average 1.443089430894309) internal successors, (355), 322 states have internal predecessors, (355), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-21 17:10:24,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 393 transitions. [2022-07-21 17:10:24,330 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 393 transitions. Word has length 90 [2022-07-21 17:10:24,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:10:24,330 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 393 transitions. [2022-07-21 17:10:24,331 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) [2022-07-21 17:10:24,331 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 393 transitions. [2022-07-21 17:10:24,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-21 17:10:24,331 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:10:24,331 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] [2022-07-21 17:10:24,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-21 17:10:24,541 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 [2022-07-21 17:10:24,541 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:10:24,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:10:24,541 INFO L85 PathProgramCache]: Analyzing trace with hash -495641031, now seen corresponding path program 6 times [2022-07-21 17:10:24,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:10:24,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141517326] [2022-07-21 17:10:24,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:10:24,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:10:24,557 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:10:24,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [458567787] [2022-07-21 17:10:24,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 17:10:24,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:10:24,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:10:24,559 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) [2022-07-21 17:10:24,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 17:10:25,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-21 17:10:25,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:10:25,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 17:10:25,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:10:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 110 proven. 3 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-07-21 17:10:25,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:10:25,971 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 110 proven. 3 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-07-21 17:10:25,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:10:25,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141517326] [2022-07-21 17:10:25,972 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:10:25,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458567787] [2022-07-21 17:10:25,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458567787] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:10:25,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:10:25,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-07-21 17:10:25,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797671254] [2022-07-21 17:10:25,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:10:25,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 17:10:25,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:10:25,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 17:10:25,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:10:25,973 INFO L87 Difference]: Start difference. First operand 351 states and 393 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) [2022-07-21 17:10:26,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:10:26,277 INFO L93 Difference]: Finished difference Result 407 states and 457 transitions. [2022-07-21 17:10:26,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 17:10:26,278 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 [2022-07-21 17:10:26,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:10:26,279 INFO L225 Difference]: With dead ends: 407 [2022-07-21 17:10:26,279 INFO L226 Difference]: Without dead ends: 367 [2022-07-21 17:10:26,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=264, Unknown=0, NotChecked=0, Total=420 [2022-07-21 17:10:26,280 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 67 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1460 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:10:26,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 1460 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:10:26,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-07-21 17:10:26,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2022-07-21 17:10:26,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 262 states have (on average 1.416030534351145) internal successors, (371), 338 states have internal predecessors, (371), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-21 17:10:26,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 409 transitions. [2022-07-21 17:10:26,285 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 409 transitions. Word has length 105 [2022-07-21 17:10:26,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:10:26,285 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 409 transitions. [2022-07-21 17:10:26,285 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) [2022-07-21 17:10:26,285 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 409 transitions. [2022-07-21 17:10:26,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-21 17:10:26,286 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:10:26,286 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] [2022-07-21 17:10:26,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-21 17:10:26,499 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 [2022-07-21 17:10:26,499 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:10:26,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:10:26,500 INFO L85 PathProgramCache]: Analyzing trace with hash -414151, now seen corresponding path program 7 times [2022-07-21 17:10:26,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:10:26,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229932853] [2022-07-21 17:10:26,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:10:26,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:10:26,519 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:10:26,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132446837] [2022-07-21 17:10:26,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 17:10:26,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:10:26,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:10:26,521 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) [2022-07-21 17:10:26,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-21 17:10:27,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:10:27,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-21 17:10:27,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:10:27,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:10:27,604 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:10:27,605 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 [2022-07-21 17:10:27,621 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 17:10:27,622 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 [2022-07-21 17:10:27,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:10:27,748 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 [2022-07-21 17:10:27,757 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-21 17:10:27,757 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 [2022-07-21 17:10:27,795 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 326 proven. 116 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-07-21 17:10:27,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:10:27,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:10:27,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229932853] [2022-07-21 17:10:27,931 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:10:27,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132446837] [2022-07-21 17:10:27,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132446837] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:10:27,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:10:27,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-07-21 17:10:27,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152468706] [2022-07-21 17:10:27,932 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 17:10:27,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 17:10:27,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:10:27,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 17:10:27,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-07-21 17:10:27,933 INFO L87 Difference]: Start difference. First operand 367 states and 409 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) [2022-07-21 17:10:28,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:10:28,896 INFO L93 Difference]: Finished difference Result 478 states and 543 transitions. [2022-07-21 17:10:28,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 17:10:28,898 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 [2022-07-21 17:10:28,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:10:28,899 INFO L225 Difference]: With dead ends: 478 [2022-07-21 17:10:28,899 INFO L226 Difference]: Without dead ends: 478 [2022-07-21 17:10:28,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-07-21 17:10:28,900 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 111 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 1400 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 1986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 571 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 17:10:28,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 902 Invalid, 1986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1400 Invalid, 0 Unknown, 571 Unchecked, 0.8s Time] [2022-07-21 17:10:28,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-07-21 17:10:28,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 375. [2022-07-21 17:10:28,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 270 states have (on average 1.4148148148148147) internal successors, (382), 346 states have internal predecessors, (382), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-21 17:10:28,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 420 transitions. [2022-07-21 17:10:28,905 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 420 transitions. Word has length 109 [2022-07-21 17:10:28,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:10:28,906 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 420 transitions. [2022-07-21 17:10:28,906 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) [2022-07-21 17:10:28,906 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 420 transitions. [2022-07-21 17:10:28,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-21 17:10:28,906 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:10:28,906 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] [2022-07-21 17:10:28,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-21 17:10:29,119 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 [2022-07-21 17:10:29,119 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:10:29,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:10:29,120 INFO L85 PathProgramCache]: Analyzing trace with hash -397998918, now seen corresponding path program 1 times [2022-07-21 17:10:29,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:10:29,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431709570] [2022-07-21 17:10:29,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:10:29,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:10:29,139 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:10:29,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [140755449] [2022-07-21 17:10:29,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:10:29,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:10:29,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:10:29,140 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) [2022-07-21 17:10:29,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-21 17:10:29,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:10:29,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 17:10:29,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:10:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-21 17:10:29,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:10:29,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:10:29,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431709570] [2022-07-21 17:10:29,387 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:10:29,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140755449] [2022-07-21 17:10:29,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140755449] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:10:29,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:10:29,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:10:29,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193718457] [2022-07-21 17:10:29,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:10:29,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:10:29,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:10:29,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:10:29,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:10:29,391 INFO L87 Difference]: Start difference. First operand 375 states and 420 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) [2022-07-21 17:10:29,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:10:29,504 INFO L93 Difference]: Finished difference Result 380 states and 428 transitions. [2022-07-21 17:10:29,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:10:29,505 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 [2022-07-21 17:10:29,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:10:29,506 INFO L225 Difference]: With dead ends: 380 [2022-07-21 17:10:29,506 INFO L226 Difference]: Without dead ends: 380 [2022-07-21 17:10:29,506 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 [2022-07-21 17:10:29,506 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 80 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 362 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 [2022-07-21 17:10:29,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 362 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:10:29,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-07-21 17:10:29,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 374. [2022-07-21 17:10:29,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 270 states have (on average 1.4111111111111112) internal successors, (381), 345 states have internal predecessors, (381), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-21 17:10:29,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 419 transitions. [2022-07-21 17:10:29,511 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 419 transitions. Word has length 111 [2022-07-21 17:10:29,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:10:29,512 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 419 transitions. [2022-07-21 17:10:29,512 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) [2022-07-21 17:10:29,512 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 419 transitions. [2022-07-21 17:10:29,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-21 17:10:29,512 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:10:29,512 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] [2022-07-21 17:10:29,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-21 17:10:29,727 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 [2022-07-21 17:10:29,727 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:10:29,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:10:29,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1352185183, now seen corresponding path program 1 times [2022-07-21 17:10:29,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:10:29,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852697769] [2022-07-21 17:10:29,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:10:29,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:10:29,748 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:10:29,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1603461731] [2022-07-21 17:10:29,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:10:29,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:10:29,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:10:29,750 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) [2022-07-21 17:10:29,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-21 17:10:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:10:30,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-21 17:10:30,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:10:30,124 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 17:10:30,124 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 [2022-07-21 17:10:30,176 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 17:10:30,177 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 [2022-07-21 17:10:30,280 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:10:30,280 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 [2022-07-21 17:10:30,421 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:10:30,421 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 [2022-07-21 17:10:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 328 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-07-21 17:10:30,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:10:30,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:10:30,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852697769] [2022-07-21 17:10:30,937 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:10:30,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603461731] [2022-07-21 17:10:30,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603461731] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:10:30,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:10:30,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-07-21 17:10:30,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183261325] [2022-07-21 17:10:30,937 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 17:10:30,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 17:10:30,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:10:30,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 17:10:30,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-07-21 17:10:30,938 INFO L87 Difference]: Start difference. First operand 374 states and 419 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) [2022-07-21 17:10:35,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:10:35,509 INFO L93 Difference]: Finished difference Result 568 states and 636 transitions. [2022-07-21 17:10:35,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 17:10:35,509 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 [2022-07-21 17:10:35,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:10:35,511 INFO L225 Difference]: With dead ends: 568 [2022-07-21 17:10:35,511 INFO L226 Difference]: Without dead ends: 568 [2022-07-21 17:10:35,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 134 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2022-07-21 17:10:35,511 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 154 mSDsluCounter, 2631 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 2856 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 430 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:10:35,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 2856 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 913 Invalid, 0 Unknown, 430 Unchecked, 0.3s Time] [2022-07-21 17:10:35,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-07-21 17:10:35,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 558. [2022-07-21 17:10:35,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 436 states have (on average 1.3073394495412844) internal successors, (570), 510 states have internal predecessors, (570), 30 states have call successors, (30), 17 states have call predecessors, (30), 17 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-07-21 17:10:35,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 630 transitions. [2022-07-21 17:10:35,518 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 630 transitions. Word has length 115 [2022-07-21 17:10:35,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:10:35,518 INFO L495 AbstractCegarLoop]: Abstraction has 558 states and 630 transitions. [2022-07-21 17:10:35,518 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) [2022-07-21 17:10:35,518 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 630 transitions. [2022-07-21 17:10:35,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-21 17:10:35,519 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:10:35,519 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] [2022-07-21 17:10:35,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-21 17:10:35,738 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 [2022-07-21 17:10:35,738 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:10:35,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:10:35,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1352185182, now seen corresponding path program 1 times [2022-07-21 17:10:35,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:10:35,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308134549] [2022-07-21 17:10:35,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:10:35,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:10:35,759 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:10:35,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [120904079] [2022-07-21 17:10:35,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:10:35,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:10:35,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:10:35,761 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) [2022-07-21 17:10:35,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-21 17:10:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:10:36,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 158 conjunts are in the unsatisfiable core [2022-07-21 17:10:36,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:10:36,697 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 [2022-07-21 17:10:36,701 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 8 treesize of output 7 [2022-07-21 17:10:37,393 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:10:37,393 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 [2022-07-21 17:10:37,442 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 17:10:37,442 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 [2022-07-21 17:10:38,007 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 17:10:38,007 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 [2022-07-21 17:10:38,012 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 [2022-07-21 17:10:38,579 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-21 17:10:38,580 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 [2022-07-21 17:10:38,588 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 [2022-07-21 17:10:38,944 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-07-21 17:10:38,944 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 [2022-07-21 17:10:38,948 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 [2022-07-21 17:10:39,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-07-21 17:10:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 242 proven. 300 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-07-21 17:10:39,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:10:39,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:10:39,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308134549] [2022-07-21 17:10:39,528 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:10:39,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120904079] [2022-07-21 17:10:39,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120904079] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:10:39,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:10:39,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2022-07-21 17:10:39,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367504721] [2022-07-21 17:10:39,529 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 17:10:39,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-21 17:10:39,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:10:39,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-21 17:10:39,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2022-07-21 17:10:39,530 INFO L87 Difference]: Start difference. First operand 558 states and 630 transitions. Second operand has 36 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 31 states have internal predecessors, (84), 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) [2022-07-21 17:10:41,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:10:41,565 INFO L93 Difference]: Finished difference Result 668 states and 761 transitions. [2022-07-21 17:10:41,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 17:10:41,566 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 31 states have internal predecessors, (84), 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 115 [2022-07-21 17:10:41,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:10:41,568 INFO L225 Difference]: With dead ends: 668 [2022-07-21 17:10:41,568 INFO L226 Difference]: Without dead ends: 668 [2022-07-21 17:10:41,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=217, Invalid=1853, Unknown=0, NotChecked=0, Total=2070 [2022-07-21 17:10:41,569 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 124 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 1439 SdHoareTripleChecker+Invalid, 3389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2263 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:10:41,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 1439 Invalid, 3389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1113 Invalid, 0 Unknown, 2263 Unchecked, 1.5s Time] [2022-07-21 17:10:41,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-07-21 17:10:41,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 565. [2022-07-21 17:10:41,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 443 states have (on average 1.3047404063205417) internal successors, (578), 517 states have internal predecessors, (578), 30 states have call successors, (30), 17 states have call predecessors, (30), 17 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-07-21 17:10:41,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 638 transitions. [2022-07-21 17:10:41,575 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 638 transitions. Word has length 115 [2022-07-21 17:10:41,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:10:41,576 INFO L495 AbstractCegarLoop]: Abstraction has 565 states and 638 transitions. [2022-07-21 17:10:41,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 31 states have internal predecessors, (84), 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) [2022-07-21 17:10:41,576 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 638 transitions. [2022-07-21 17:10:41,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-21 17:10:41,576 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:10:41,577 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] [2022-07-21 17:10:41,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-21 17:10:41,791 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 [2022-07-21 17:10:41,791 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:10:41,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:10:41,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1031932342, now seen corresponding path program 1 times [2022-07-21 17:10:41,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:10:41,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665750855] [2022-07-21 17:10:41,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:10:41,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:10:41,814 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:10:41,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247850764] [2022-07-21 17:10:41,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:10:41,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:10:41,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:10:41,816 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) [2022-07-21 17:10:41,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-21 17:10:42,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:10:42,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 17:10:42,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:10:42,112 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-21 17:10:42,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:10:42,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:10:42,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665750855] [2022-07-21 17:10:42,112 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:10:42,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247850764] [2022-07-21 17:10:42,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247850764] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:10:42,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:10:42,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:10:42,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946121729] [2022-07-21 17:10:42,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:10:42,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:10:42,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:10:42,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:10:42,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:10:42,114 INFO L87 Difference]: Start difference. First operand 565 states and 638 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) [2022-07-21 17:10:42,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:10:42,223 INFO L93 Difference]: Finished difference Result 573 states and 649 transitions. [2022-07-21 17:10:42,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:10:42,223 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 [2022-07-21 17:10:42,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:10:42,224 INFO L225 Difference]: With dead ends: 573 [2022-07-21 17:10:42,224 INFO L226 Difference]: Without dead ends: 573 [2022-07-21 17:10:42,225 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 [2022-07-21 17:10:42,225 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 134 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:10:42,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 524 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:10:42,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-07-21 17:10:42,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 564. [2022-07-21 17:10:42,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 443 states have (on average 1.3024830699774266) internal successors, (577), 516 states have internal predecessors, (577), 30 states have call successors, (30), 17 states have call predecessors, (30), 17 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-07-21 17:10:42,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 637 transitions. [2022-07-21 17:10:42,246 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 637 transitions. Word has length 116 [2022-07-21 17:10:42,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:10:42,246 INFO L495 AbstractCegarLoop]: Abstraction has 564 states and 637 transitions. [2022-07-21 17:10:42,247 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) [2022-07-21 17:10:42,247 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 637 transitions. [2022-07-21 17:10:42,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-21 17:10:42,248 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:10:42,248 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] [2022-07-21 17:10:42,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-21 17:10:42,459 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 [2022-07-21 17:10:42,459 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:10:42,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:10:42,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1031932343, now seen corresponding path program 1 times [2022-07-21 17:10:42,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:10:42,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035880659] [2022-07-21 17:10:42,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:10:42,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:10:42,484 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:10:42,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [838331206] [2022-07-21 17:10:42,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:10:42,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:10:42,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:10:42,486 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) [2022-07-21 17:10:42,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-21 17:10:42,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:10:42,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-21 17:10:42,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:10:42,896 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 64 proven. 106 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-07-21 17:10:42,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:10:42,966 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:10:42,966 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 [2022-07-21 17:10:43,174 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 64 proven. 106 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-07-21 17:10:43,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:10:43,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035880659] [2022-07-21 17:10:43,174 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:10:43,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838331206] [2022-07-21 17:10:43,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838331206] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:10:43,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:10:43,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-07-21 17:10:43,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322464166] [2022-07-21 17:10:43,175 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:10:43,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 17:10:43,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:10:43,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 17:10:43,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-07-21 17:10:43,175 INFO L87 Difference]: Start difference. First operand 564 states and 637 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) [2022-07-21 17:10:43,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:10:43,460 INFO L93 Difference]: Finished difference Result 572 states and 648 transitions. [2022-07-21 17:10:43,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 17:10:43,460 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 [2022-07-21 17:10:43,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:10:43,461 INFO L225 Difference]: With dead ends: 572 [2022-07-21 17:10:43,462 INFO L226 Difference]: Without dead ends: 572 [2022-07-21 17:10:43,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-07-21 17:10:43,462 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 200 mSDsluCounter, 2390 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 2612 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:10:43,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 2612 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:10:43,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-07-21 17:10:43,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 563. [2022-07-21 17:10:43,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 443 states have (on average 1.3002257336343115) internal successors, (576), 515 states have internal predecessors, (576), 30 states have call successors, (30), 17 states have call predecessors, (30), 17 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-07-21 17:10:43,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 636 transitions. [2022-07-21 17:10:43,468 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 636 transitions. Word has length 116 [2022-07-21 17:10:43,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:10:43,468 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 636 transitions. [2022-07-21 17:10:43,469 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) [2022-07-21 17:10:43,469 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 636 transitions. [2022-07-21 17:10:43,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-21 17:10:43,480 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:10:43,480 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] [2022-07-21 17:10:43,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-21 17:10:43,695 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 [2022-07-21 17:10:43,695 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:10:43,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:10:43,695 INFO L85 PathProgramCache]: Analyzing trace with hash -450462856, now seen corresponding path program 1 times [2022-07-21 17:10:43,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:10:43,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018196503] [2022-07-21 17:10:43,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:10:43,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:10:43,717 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:10:43,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282742417] [2022-07-21 17:10:43,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:10:43,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:10:43,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:10:43,718 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) [2022-07-21 17:10:43,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-21 17:10:44,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:10:44,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 17:10:44,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:10:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-21 17:10:44,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:10:44,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:10:44,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018196503] [2022-07-21 17:10:44,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:10:44,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282742417] [2022-07-21 17:10:44,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282742417] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:10:44,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:10:44,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:10:44,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80478603] [2022-07-21 17:10:44,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:10:44,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:10:44,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:10:44,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:10:44,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:10:44,055 INFO L87 Difference]: Start difference. First operand 563 states and 636 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) [2022-07-21 17:10:44,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:10:44,172 INFO L93 Difference]: Finished difference Result 566 states and 641 transitions. [2022-07-21 17:10:44,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:10:44,173 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 [2022-07-21 17:10:44,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:10:44,175 INFO L225 Difference]: With dead ends: 566 [2022-07-21 17:10:44,175 INFO L226 Difference]: Without dead ends: 566 [2022-07-21 17:10:44,175 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 [2022-07-21 17:10:44,175 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 64 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:10:44,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 368 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:10:44,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-07-21 17:10:44,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 562. [2022-07-21 17:10:44,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 443 states have (on average 1.2979683972911964) internal successors, (575), 514 states have internal predecessors, (575), 30 states have call successors, (30), 17 states have call predecessors, (30), 17 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-07-21 17:10:44,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 635 transitions. [2022-07-21 17:10:44,189 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 635 transitions. Word has length 118 [2022-07-21 17:10:44,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:10:44,190 INFO L495 AbstractCegarLoop]: Abstraction has 562 states and 635 transitions. [2022-07-21 17:10:44,191 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) [2022-07-21 17:10:44,191 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 635 transitions. [2022-07-21 17:10:44,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-21 17:10:44,191 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:10:44,191 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] [2022-07-21 17:10:44,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-21 17:10:44,402 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 [2022-07-21 17:10:44,402 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:10:44,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:10:44,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1373927457, now seen corresponding path program 1 times [2022-07-21 17:10:44,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:10:44,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135119885] [2022-07-21 17:10:44,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:10:44,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:10:44,423 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:10:44,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602504990] [2022-07-21 17:10:44,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:10:44,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:10:44,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:10:44,425 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) [2022-07-21 17:10:44,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-21 17:10:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:10:44,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 74 conjunts are in the unsatisfiable core [2022-07-21 17:10:44,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:10:44,906 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 17:10:44,906 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 [2022-07-21 17:10:45,004 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-21 17:10:45,004 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 [2022-07-21 17:10:45,126 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-07-21 17:10:45,126 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 [2022-07-21 17:10:45,255 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-07-21 17:10:45,255 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 [2022-07-21 17:10:45,463 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-07-21 17:10:45,464 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 [2022-07-21 17:10:45,792 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 5 proven. 498 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-21 17:10:45,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:10:45,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:10:45,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135119885] [2022-07-21 17:10:45,909 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:10:45,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602504990] [2022-07-21 17:10:45,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602504990] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:10:45,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:10:45,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-07-21 17:10:45,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149816135] [2022-07-21 17:10:45,910 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 17:10:45,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 17:10:45,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:10:45,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 17:10:45,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-07-21 17:10:45,911 INFO L87 Difference]: Start difference. First operand 562 states and 635 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) [2022-07-21 17:10:50,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:10:50,377 INFO L93 Difference]: Finished difference Result 954 states and 1084 transitions. [2022-07-21 17:10:50,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 17:10:50,377 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 [2022-07-21 17:10:50,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:10:50,379 INFO L225 Difference]: With dead ends: 954 [2022-07-21 17:10:50,379 INFO L226 Difference]: Without dead ends: 954 [2022-07-21 17:10:50,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 116 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=174, Invalid=1230, Unknown=2, NotChecked=0, Total=1406 [2022-07-21 17:10:50,380 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 138 mSDsluCounter, 2930 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 3152 SdHoareTripleChecker+Invalid, 1619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1052 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:10:50,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 3152 Invalid, 1619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 564 Invalid, 0 Unknown, 1052 Unchecked, 0.2s Time] [2022-07-21 17:10:50,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-07-21 17:10:50,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 949. [2022-07-21 17:10:50,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 791 states have (on average 1.2326169405815424) internal successors, (975), 862 states have internal predecessors, (975), 53 states have call successors, (53), 33 states have call predecessors, (53), 33 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2022-07-21 17:10:50,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1081 transitions. [2022-07-21 17:10:50,389 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1081 transitions. Word has length 122 [2022-07-21 17:10:50,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:10:50,389 INFO L495 AbstractCegarLoop]: Abstraction has 949 states and 1081 transitions. [2022-07-21 17:10:50,390 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) [2022-07-21 17:10:50,390 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1081 transitions. [2022-07-21 17:10:50,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-21 17:10:50,390 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:10:50,390 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] [2022-07-21 17:10:50,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-21 17:10:50,611 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 [2022-07-21 17:10:50,612 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:10:50,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:10:50,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1373927456, now seen corresponding path program 1 times [2022-07-21 17:10:50,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:10:50,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988789895] [2022-07-21 17:10:50,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:10:50,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:10:50,633 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:10:50,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1471043084] [2022-07-21 17:10:50,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:10:50,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:10:50,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:10:50,635 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) [2022-07-21 17:10:50,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-21 17:10:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:10:51,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-21 17:10:51,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:10:51,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:10:52,214 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:10:52,214 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 18 treesize of output 24 [2022-07-21 17:10:52,243 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 17:10:52,243 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 [2022-07-21 17:10:52,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:10:52,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-21 17:10:52,381 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:10:52,381 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 [2022-07-21 17:10:52,439 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 278 proven. 213 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-07-21 17:10:52,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:10:52,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:10:52,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988789895] [2022-07-21 17:10:52,566 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:10:52,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471043084] [2022-07-21 17:10:52,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471043084] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:10:52,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:10:52,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-07-21 17:10:52,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776404993] [2022-07-21 17:10:52,567 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 17:10:52,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 17:10:52,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:10:52,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 17:10:52,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2022-07-21 17:10:52,567 INFO L87 Difference]: Start difference. First operand 949 states and 1081 transitions. Second operand has 26 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 23 states have internal predecessors, (79), 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) [2022-07-21 17:10:54,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:10:54,758 INFO L93 Difference]: Finished difference Result 1290 states and 1521 transitions. [2022-07-21 17:10:54,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 17:10:54,759 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 23 states have internal predecessors, (79), 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 122 [2022-07-21 17:10:54,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:10:54,763 INFO L225 Difference]: With dead ends: 1290 [2022-07-21 17:10:54,763 INFO L226 Difference]: Without dead ends: 1280 [2022-07-21 17:10:54,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=143, Invalid=1339, Unknown=0, NotChecked=0, Total=1482 [2022-07-21 17:10:54,764 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 115 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 3084 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 1450 SdHoareTripleChecker+Invalid, 4397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 3084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1298 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-21 17:10:54,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 1450 Invalid, 4397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 3084 Invalid, 0 Unknown, 1298 Unchecked, 1.8s Time] [2022-07-21 17:10:54,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2022-07-21 17:10:54,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1110. [2022-07-21 17:10:54,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 928 states have (on average 1.2122844827586208) internal successors, (1125), 999 states have internal predecessors, (1125), 69 states have call successors, (69), 33 states have call predecessors, (69), 41 states have return successors, (100), 77 states have call predecessors, (100), 69 states have call successors, (100) [2022-07-21 17:10:54,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 1294 transitions. [2022-07-21 17:10:54,784 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 1294 transitions. Word has length 122 [2022-07-21 17:10:54,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:10:54,785 INFO L495 AbstractCegarLoop]: Abstraction has 1110 states and 1294 transitions. [2022-07-21 17:10:54,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 23 states have internal predecessors, (79), 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) [2022-07-21 17:10:54,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 1294 transitions. [2022-07-21 17:10:54,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-21 17:10:54,786 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:10:54,786 INFO L195 NwaCegarLoop]: trace histogram [27, 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] [2022-07-21 17:10:54,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-21 17:10:55,003 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 [2022-07-21 17:10:55,003 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:10:55,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:10:55,004 INFO L85 PathProgramCache]: Analyzing trace with hash 941894588, now seen corresponding path program 2 times [2022-07-21 17:10:55,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:10:55,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053885281] [2022-07-21 17:10:55,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:10:55,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:10:55,026 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:10:55,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607742804] [2022-07-21 17:10:55,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:10:55,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:10:55,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:10:55,028 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) [2022-07-21 17:10:55,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-21 17:11:57,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:11:57,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:11:57,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 226 conjunts are in the unsatisfiable core [2022-07-21 17:11:57,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:11:57,659 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 [2022-07-21 17:11:57,682 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 [2022-07-21 17:11:58,689 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 17:11:58,690 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 [2022-07-21 17:11:58,695 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 [2022-07-21 17:11:59,132 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-21 17:11:59,133 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 [2022-07-21 17:11:59,143 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 [2022-07-21 17:12:00,077 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:12:00,078 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 [2022-07-21 17:12:00,142 INFO L356 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2022-07-21 17:12:00,142 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 30 [2022-07-21 17:12:00,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 15 treesize of output 11 [2022-07-21 17:12:00,708 INFO L356 Elim1Store]: treesize reduction 96, result has 27.8 percent of original size [2022-07-21 17:12:00,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 32 treesize of output 57 [2022-07-21 17:12:00,751 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 29 treesize of output 29 [2022-07-21 17:12:01,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 17:12:01,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:12:01,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2022-07-21 17:12:01,287 INFO L356 Elim1Store]: treesize reduction 44, result has 32.3 percent of original size [2022-07-21 17:12:01,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 31 treesize of output 39 [2022-07-21 17:12:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 35 proven. 436 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-07-21 17:12:01,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:12:02,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:12:02,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053885281] [2022-07-21 17:12:02,422 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:12:02,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607742804] [2022-07-21 17:12:02,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607742804] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:12:02,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:12:02,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2022-07-21 17:12:02,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223728083] [2022-07-21 17:12:02,423 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 17:12:02,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-21 17:12:02,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:12:02,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-21 17:12:02,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1692, Unknown=0, NotChecked=0, Total=1892 [2022-07-21 17:12:02,424 INFO L87 Difference]: Start difference. First operand 1110 states and 1294 transitions. Second operand has 39 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 17:12:05,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:12:05,396 INFO L93 Difference]: Finished difference Result 1282 states and 1502 transitions. [2022-07-21 17:12:05,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-21 17:12:05,397 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 123 [2022-07-21 17:12:05,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:12:05,400 INFO L225 Difference]: With dead ends: 1282 [2022-07-21 17:12:05,400 INFO L226 Difference]: Without dead ends: 1282 [2022-07-21 17:12:05,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=252, Invalid=2298, Unknown=0, NotChecked=0, Total=2550 [2022-07-21 17:12:05,401 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 169 mSDsluCounter, 1892 mSDsCounter, 0 mSdLazyCounter, 1368 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 2047 SdHoareTripleChecker+Invalid, 7729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6341 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-21 17:12:05,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 2047 Invalid, 7729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1368 Invalid, 0 Unknown, 6341 Unchecked, 1.8s Time] [2022-07-21 17:12:05,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2022-07-21 17:12:05,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1120. [2022-07-21 17:12:05,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 938 states have (on average 1.2142857142857142) internal successors, (1139), 1009 states have internal predecessors, (1139), 69 states have call successors, (69), 33 states have call predecessors, (69), 41 states have return successors, (100), 77 states have call predecessors, (100), 69 states have call successors, (100) [2022-07-21 17:12:05,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1308 transitions. [2022-07-21 17:12:05,413 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1308 transitions. Word has length 123 [2022-07-21 17:12:05,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:12:05,413 INFO L495 AbstractCegarLoop]: Abstraction has 1120 states and 1308 transitions. [2022-07-21 17:12:05,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 17:12:05,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1308 transitions. [2022-07-21 17:12:05,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-21 17:12:05,414 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:12:05,414 INFO L195 NwaCegarLoop]: trace histogram [27, 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] [2022-07-21 17:12:05,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-21 17:12:05,627 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 [2022-07-21 17:12:05,627 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:12:05,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:12:05,628 INFO L85 PathProgramCache]: Analyzing trace with hash -866038798, now seen corresponding path program 1 times [2022-07-21 17:12:05,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:12:05,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15551358] [2022-07-21 17:12:05,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:05,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:12:05,654 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:12:05,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311502431] [2022-07-21 17:12:05,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:05,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:12:05,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:12:05,661 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) [2022-07-21 17:12:05,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-21 17:12:06,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:12:06,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 1101 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 17:12:06,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:12:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-07-21 17:12:06,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:12:06,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:12:06,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15551358] [2022-07-21 17:12:06,078 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:12:06,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311502431] [2022-07-21 17:12:06,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311502431] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:12:06,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:12:06,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:12:06,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499174841] [2022-07-21 17:12:06,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:12:06,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:12:06,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:12:06,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:12:06,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:12:06,080 INFO L87 Difference]: Start difference. First operand 1120 states and 1308 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) [2022-07-21 17:12:06,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:12:06,194 INFO L93 Difference]: Finished difference Result 1123 states and 1312 transitions. [2022-07-21 17:12:06,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:12:06,194 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 124 [2022-07-21 17:12:06,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:12:06,197 INFO L225 Difference]: With dead ends: 1123 [2022-07-21 17:12:06,197 INFO L226 Difference]: Without dead ends: 1123 [2022-07-21 17:12:06,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:12:06,197 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 106 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:12:06,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 521 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:12:06,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2022-07-21 17:12:06,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 1119. [2022-07-21 17:12:06,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 938 states have (on average 1.2121535181236673) internal successors, (1137), 1008 states have internal predecessors, (1137), 69 states have call successors, (69), 33 states have call predecessors, (69), 41 states have return successors, (100), 77 states have call predecessors, (100), 69 states have call successors, (100) [2022-07-21 17:12:06,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1306 transitions. [2022-07-21 17:12:06,208 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1306 transitions. Word has length 124 [2022-07-21 17:12:06,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:12:06,208 INFO L495 AbstractCegarLoop]: Abstraction has 1119 states and 1306 transitions. [2022-07-21 17:12:06,208 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) [2022-07-21 17:12:06,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1306 transitions. [2022-07-21 17:12:06,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-21 17:12:06,209 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:12:06,209 INFO L195 NwaCegarLoop]: trace histogram [27, 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] [2022-07-21 17:12:06,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-21 17:12:06,423 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 [2022-07-21 17:12:06,423 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:12:06,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:12:06,424 INFO L85 PathProgramCache]: Analyzing trace with hash -866038797, now seen corresponding path program 1 times [2022-07-21 17:12:06,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:12:06,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192410831] [2022-07-21 17:12:06,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:06,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:12:06,448 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:12:06,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1204838432] [2022-07-21 17:12:06,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:06,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:12:06,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:12:06,450 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) [2022-07-21 17:12:06,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-21 17:12:07,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:12:07,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 1101 conjuncts, 127 conjunts are in the unsatisfiable core [2022-07-21 17:12:07,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:12:07,456 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 [2022-07-21 17:12:07,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:12:07,828 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:12:07,829 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 [2022-07-21 17:12:07,846 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 17:12:07,846 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 [2022-07-21 17:12:08,057 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-21 17:12:08,057 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 [2022-07-21 17:12:08,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-21 17:12:08,247 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:12:08,247 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 [2022-07-21 17:12:08,286 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-07-21 17:12:08,286 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 [2022-07-21 17:12:08,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:12:08,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 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 [2022-07-21 17:12:08,509 INFO L356 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2022-07-21 17:12:08,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 32 [2022-07-21 17:12:08,580 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 183 proven. 276 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-07-21 17:12:08,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:12:08,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:12:08,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192410831] [2022-07-21 17:12:08,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:12:08,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204838432] [2022-07-21 17:12:08,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204838432] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:12:08,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:12:08,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-07-21 17:12:08,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155372358] [2022-07-21 17:12:08,801 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 17:12:08,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 17:12:08,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:12:08,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 17:12:08,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-07-21 17:12:08,802 INFO L87 Difference]: Start difference. First operand 1119 states and 1306 transitions. Second operand has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 19 states have internal predecessors, (73), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-21 17:12:10,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:12:10,423 INFO L93 Difference]: Finished difference Result 1333 states and 1574 transitions. [2022-07-21 17:12:10,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 17:12:10,424 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 19 states have internal predecessors, (73), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 124 [2022-07-21 17:12:10,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:12:10,427 INFO L225 Difference]: With dead ends: 1333 [2022-07-21 17:12:10,427 INFO L226 Difference]: Without dead ends: 1333 [2022-07-21 17:12:10,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2022-07-21 17:12:10,427 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 200 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 2357 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 3153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 758 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:12:10,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 843 Invalid, 3153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2357 Invalid, 0 Unknown, 758 Unchecked, 1.4s Time] [2022-07-21 17:12:10,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-07-21 17:12:10,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 1127. [2022-07-21 17:12:10,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 946 states have (on average 1.2124735729386893) internal successors, (1147), 1016 states have internal predecessors, (1147), 69 states have call successors, (69), 33 states have call predecessors, (69), 41 states have return successors, (100), 77 states have call predecessors, (100), 69 states have call successors, (100) [2022-07-21 17:12:10,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 1316 transitions. [2022-07-21 17:12:10,440 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 1316 transitions. Word has length 124 [2022-07-21 17:12:10,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:12:10,440 INFO L495 AbstractCegarLoop]: Abstraction has 1127 states and 1316 transitions. [2022-07-21 17:12:10,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 19 states have internal predecessors, (73), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-21 17:12:10,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 1316 transitions. [2022-07-21 17:12:10,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-21 17:12:10,441 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:12:10,441 INFO L195 NwaCegarLoop]: trace histogram [27, 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] [2022-07-21 17:12:10,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-21 17:12:10,673 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 [2022-07-21 17:12:10,673 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:12:10,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:12:10,673 INFO L85 PathProgramCache]: Analyzing trace with hash 960373107, now seen corresponding path program 1 times [2022-07-21 17:12:10,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:12:10,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321600043] [2022-07-21 17:12:10,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:10,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:12:10,696 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:12:10,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843687085] [2022-07-21 17:12:10,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:10,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:12:10,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:12:10,697 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) [2022-07-21 17:12:10,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-21 17:12:11,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:12:11,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 17:12:11,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:12:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-07-21 17:12:11,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:12:11,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:12:11,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321600043] [2022-07-21 17:12:11,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:12:11,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843687085] [2022-07-21 17:12:11,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843687085] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:12:11,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:12:11,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:12:11,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50983586] [2022-07-21 17:12:11,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:12:11,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:12:11,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:12:11,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:12:11,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:12:11,145 INFO L87 Difference]: Start difference. First operand 1127 states and 1316 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) [2022-07-21 17:12:11,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:12:11,247 INFO L93 Difference]: Finished difference Result 1128 states and 1318 transitions. [2022-07-21 17:12:11,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:12:11,247 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 126 [2022-07-21 17:12:11,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:12:11,250 INFO L225 Difference]: With dead ends: 1128 [2022-07-21 17:12:11,250 INFO L226 Difference]: Without dead ends: 1128 [2022-07-21 17:12:11,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:12:11,251 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 25 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:12:11,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 396 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:12:11,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2022-07-21 17:12:11,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1126. [2022-07-21 17:12:11,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 946 states have (on average 1.2103594080338267) internal successors, (1145), 1015 states have internal predecessors, (1145), 69 states have call successors, (69), 33 states have call predecessors, (69), 41 states have return successors, (100), 77 states have call predecessors, (100), 69 states have call successors, (100) [2022-07-21 17:12:11,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1314 transitions. [2022-07-21 17:12:11,266 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1314 transitions. Word has length 126 [2022-07-21 17:12:11,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:12:11,267 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 1314 transitions. [2022-07-21 17:12:11,267 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) [2022-07-21 17:12:11,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1314 transitions. [2022-07-21 17:12:11,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-21 17:12:11,267 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:12:11,268 INFO L195 NwaCegarLoop]: trace histogram [27, 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] [2022-07-21 17:12:11,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-21 17:12:11,487 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 [2022-07-21 17:12:11,487 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:12:11,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:12:11,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1103242588, now seen corresponding path program 1 times [2022-07-21 17:12:11,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:12:11,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112846391] [2022-07-21 17:12:11,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:11,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:12:11,512 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:12:11,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1348498336] [2022-07-21 17:12:11,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:11,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:12:11,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:12:11,513 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) [2022-07-21 17:12:11,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-21 17:12:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:12:11,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 117 conjunts are in the unsatisfiable core [2022-07-21 17:12:11,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:12:12,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:12:12,043 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 [2022-07-21 17:12:12,053 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 17:12:12,053 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 [2022-07-21 17:12:12,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:12:12,146 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 [2022-07-21 17:12:12,157 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 17:12:12,157 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 [2022-07-21 17:12:12,263 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:12:12,264 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 18 [2022-07-21 17:12:12,277 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:12:12,277 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 [2022-07-21 17:12:12,490 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:12:12,490 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 [2022-07-21 17:12:12,508 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:12:12,508 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 [2022-07-21 17:12:12,823 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:12:12,824 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 [2022-07-21 17:12:12,848 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:12:12,848 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 [2022-07-21 17:12:13,079 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:12:13,079 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 22 treesize of output 28 [2022-07-21 17:12:13,101 INFO L356 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2022-07-21 17:12:13,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 37 [2022-07-21 17:12:14,387 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 69 proven. 456 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-07-21 17:12:14,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:12:15,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:12:15,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112846391] [2022-07-21 17:12:15,226 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:12:15,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348498336] [2022-07-21 17:12:15,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348498336] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:12:15,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:12:15,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2022-07-21 17:12:15,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994936725] [2022-07-21 17:12:15,226 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 17:12:15,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 17:12:15,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:12:15,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 17:12:15,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1413, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 17:12:15,227 INFO L87 Difference]: Start difference. First operand 1126 states and 1314 transitions. Second operand has 33 states, 30 states have (on average 2.933333333333333) internal successors, (88), 27 states have internal predecessors, (88), 4 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:12:16,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:12:16,275 INFO L93 Difference]: Finished difference Result 1284 states and 1495 transitions. [2022-07-21 17:12:16,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 17:12:16,276 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.933333333333333) internal successors, (88), 27 states have internal predecessors, (88), 4 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 130 [2022-07-21 17:12:16,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:12:16,278 INFO L225 Difference]: With dead ends: 1284 [2022-07-21 17:12:16,279 INFO L226 Difference]: Without dead ends: 1284 [2022-07-21 17:12:16,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 105 SyntacticMatches, 18 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=226, Invalid=2224, Unknown=0, NotChecked=0, Total=2450 [2022-07-21 17:12:16,279 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 23 mSDsluCounter, 2683 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2910 SdHoareTripleChecker+Invalid, 2608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1745 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:12:16,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 2910 Invalid, 2608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 858 Invalid, 0 Unknown, 1745 Unchecked, 0.6s Time] [2022-07-21 17:12:16,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2022-07-21 17:12:16,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1251. [2022-07-21 17:12:16,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1057 states have (on average 1.1986754966887416) internal successors, (1267), 1127 states have internal predecessors, (1267), 77 states have call successors, (77), 38 states have call predecessors, (77), 47 states have return successors, (111), 85 states have call predecessors, (111), 77 states have call successors, (111) [2022-07-21 17:12:16,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 1455 transitions. [2022-07-21 17:12:16,292 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 1455 transitions. Word has length 130 [2022-07-21 17:12:16,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:12:16,292 INFO L495 AbstractCegarLoop]: Abstraction has 1251 states and 1455 transitions. [2022-07-21 17:12:16,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.933333333333333) internal successors, (88), 27 states have internal predecessors, (88), 4 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:12:16,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 1455 transitions. [2022-07-21 17:12:16,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-21 17:12:16,293 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:12:16,293 INFO L195 NwaCegarLoop]: trace histogram [27, 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] [2022-07-21 17:12:16,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-07-21 17:12:16,513 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 [2022-07-21 17:12:16,513 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:12:16,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:12:16,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1103242587, now seen corresponding path program 1 times [2022-07-21 17:12:16,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:12:16,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267728814] [2022-07-21 17:12:16,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:16,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:12:16,537 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:12:16,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1832943797] [2022-07-21 17:12:16,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:16,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:12:16,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:12:16,539 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) [2022-07-21 17:12:16,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-21 17:12:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:12:16,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-21 17:12:17,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:12:17,078 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:12:17,078 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 [2022-07-21 17:12:17,135 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:12:17,136 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 [2022-07-21 17:12:17,191 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:12:17,191 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 [2022-07-21 17:12:17,247 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:12:17,248 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 [2022-07-21 17:12:17,299 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:12:17,299 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 [2022-07-21 17:12:17,376 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:12:17,376 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 [2022-07-21 17:12:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-07-21 17:12:17,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:12:17,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:12:17,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267728814] [2022-07-21 17:12:17,433 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:12:17,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832943797] [2022-07-21 17:12:17,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832943797] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:12:17,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:12:17,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:12:17,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771664855] [2022-07-21 17:12:17,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:12:17,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:12:17,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:12:17,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:12:17,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:12:17,434 INFO L87 Difference]: Start difference. First operand 1251 states and 1455 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) [2022-07-21 17:12:17,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:12:17,719 INFO L93 Difference]: Finished difference Result 1829 states and 2215 transitions. [2022-07-21 17:12:17,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 17:12:17,720 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 130 [2022-07-21 17:12:17,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:12:17,724 INFO L225 Difference]: With dead ends: 1829 [2022-07-21 17:12:17,724 INFO L226 Difference]: Without dead ends: 1829 [2022-07-21 17:12:17,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 113 SyntacticMatches, 11 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:12:17,724 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 167 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 334 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:12:17,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 970 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 388 Invalid, 0 Unknown, 334 Unchecked, 0.3s Time] [2022-07-21 17:12:17,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2022-07-21 17:12:17,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1672. [2022-07-21 17:12:17,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1423 states have (on average 1.2066057624736473) internal successors, (1717), 1485 states have internal predecessors, (1717), 132 states have call successors, (132), 38 states have call predecessors, (132), 47 states have return successors, (191), 148 states have call predecessors, (191), 132 states have call successors, (191) [2022-07-21 17:12:17,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2040 transitions. [2022-07-21 17:12:17,742 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2040 transitions. Word has length 130 [2022-07-21 17:12:17,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:12:17,742 INFO L495 AbstractCegarLoop]: Abstraction has 1672 states and 2040 transitions. [2022-07-21 17:12:17,742 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) [2022-07-21 17:12:17,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2040 transitions. [2022-07-21 17:12:17,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-21 17:12:17,743 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:12:17,743 INFO L195 NwaCegarLoop]: trace histogram [27, 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] [2022-07-21 17:12:17,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-21 17:12:17,963 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 [2022-07-21 17:12:17,963 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:12:17,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:12:17,963 INFO L85 PathProgramCache]: Analyzing trace with hash -159218072, now seen corresponding path program 1 times [2022-07-21 17:12:17,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:12:17,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11460922] [2022-07-21 17:12:17,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:17,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:12:18,003 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:12:18,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [871597308] [2022-07-21 17:12:18,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:18,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:12:18,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:12:18,004 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) [2022-07-21 17:12:18,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-21 17:12:18,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:12:18,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 1147 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 17:12:18,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:12:18,492 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-07-21 17:12:18,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:12:18,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:12:18,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11460922] [2022-07-21 17:12:18,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:12:18,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871597308] [2022-07-21 17:12:18,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871597308] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:12:18,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:12:18,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:12:18,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278054015] [2022-07-21 17:12:18,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:12:18,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:12:18,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:12:18,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:12:18,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:12:18,493 INFO L87 Difference]: Start difference. First operand 1672 states and 2040 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) [2022-07-21 17:12:18,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:12:18,617 INFO L93 Difference]: Finished difference Result 1671 states and 2038 transitions. [2022-07-21 17:12:18,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:12:18,618 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 131 [2022-07-21 17:12:18,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:12:18,621 INFO L225 Difference]: With dead ends: 1671 [2022-07-21 17:12:18,622 INFO L226 Difference]: Without dead ends: 1671 [2022-07-21 17:12:18,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:12:18,622 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 82 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:12:18,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 520 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:12:18,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2022-07-21 17:12:18,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1671. [2022-07-21 17:12:18,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1423 states have (on average 1.2052002810962754) internal successors, (1715), 1484 states have internal predecessors, (1715), 132 states have call successors, (132), 38 states have call predecessors, (132), 47 states have return successors, (191), 148 states have call predecessors, (191), 132 states have call successors, (191) [2022-07-21 17:12:18,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 2038 transitions. [2022-07-21 17:12:18,637 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 2038 transitions. Word has length 131 [2022-07-21 17:12:18,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:12:18,637 INFO L495 AbstractCegarLoop]: Abstraction has 1671 states and 2038 transitions. [2022-07-21 17:12:18,637 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) [2022-07-21 17:12:18,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 2038 transitions. [2022-07-21 17:12:18,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-21 17:12:18,638 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:12:18,638 INFO L195 NwaCegarLoop]: trace histogram [27, 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] [2022-07-21 17:12:18,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-07-21 17:12:18,851 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 [2022-07-21 17:12:18,851 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:12:18,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:12:18,852 INFO L85 PathProgramCache]: Analyzing trace with hash -159218071, now seen corresponding path program 1 times [2022-07-21 17:12:18,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:12:18,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699126462] [2022-07-21 17:12:18,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:18,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:12:18,876 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:12:18,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936346633] [2022-07-21 17:12:18,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:18,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:12:18,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:12:18,878 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) [2022-07-21 17:12:18,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-21 17:12:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:12:19,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 1147 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-21 17:12:19,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:12:19,575 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2022-07-21 17:12:19,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:12:19,633 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:12:19,633 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 [2022-07-21 17:12:19,995 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2022-07-21 17:12:19,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:12:19,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699126462] [2022-07-21 17:12:19,995 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:12:19,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936346633] [2022-07-21 17:12:19,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936346633] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:12:19,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:12:19,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-07-21 17:12:19,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034410485] [2022-07-21 17:12:19,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:12:19,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 17:12:19,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:12:19,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 17:12:19,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-07-21 17:12:19,996 INFO L87 Difference]: Start difference. First operand 1671 states and 2038 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) [2022-07-21 17:12:20,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:12:20,212 INFO L93 Difference]: Finished difference Result 1670 states and 2036 transitions. [2022-07-21 17:12:20,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 17:12:20,213 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 131 [2022-07-21 17:12:20,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:12:20,217 INFO L225 Difference]: With dead ends: 1670 [2022-07-21 17:12:20,217 INFO L226 Difference]: Without dead ends: 1670 [2022-07-21 17:12:20,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-07-21 17:12:20,217 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 290 mSDsluCounter, 1806 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 2025 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:12:20,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 2025 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:12:20,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2022-07-21 17:12:20,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1670. [2022-07-21 17:12:20,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1423 states have (on average 1.2037947997189038) internal successors, (1713), 1483 states have internal predecessors, (1713), 132 states have call successors, (132), 38 states have call predecessors, (132), 47 states have return successors, (191), 148 states have call predecessors, (191), 132 states have call successors, (191) [2022-07-21 17:12:20,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 2036 transitions. [2022-07-21 17:12:20,234 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 2036 transitions. Word has length 131 [2022-07-21 17:12:20,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:12:20,235 INFO L495 AbstractCegarLoop]: Abstraction has 1670 states and 2036 transitions. [2022-07-21 17:12:20,235 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) [2022-07-21 17:12:20,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 2036 transitions. [2022-07-21 17:12:20,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-21 17:12:20,236 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:12:20,236 INFO L195 NwaCegarLoop]: trace histogram [27, 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] [2022-07-21 17:12:20,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-21 17:12:20,451 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 [2022-07-21 17:12:20,451 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:12:20,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:12:20,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1610258730, now seen corresponding path program 1 times [2022-07-21 17:12:20,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:12:20,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535818387] [2022-07-21 17:12:20,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:20,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:12:20,476 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:12:20,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [487380542] [2022-07-21 17:12:20,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:20,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:12:20,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:12:20,478 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) [2022-07-21 17:12:20,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-21 17:12:20,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:12:20,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 17:12:20,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:12:20,984 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-07-21 17:12:20,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:12:20,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:12:20,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535818387] [2022-07-21 17:12:20,985 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:12:20,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487380542] [2022-07-21 17:12:20,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487380542] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:12:20,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:12:20,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:12:20,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461549397] [2022-07-21 17:12:20,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:12:20,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:12:20,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:12:20,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:12:20,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:12:20,986 INFO L87 Difference]: Start difference. First operand 1670 states and 2036 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) [2022-07-21 17:12:21,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:12:21,117 INFO L93 Difference]: Finished difference Result 1669 states and 2034 transitions. [2022-07-21 17:12:21,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:12:21,118 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 133 [2022-07-21 17:12:21,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:12:21,121 INFO L225 Difference]: With dead ends: 1669 [2022-07-21 17:12:21,122 INFO L226 Difference]: Without dead ends: 1669 [2022-07-21 17:12:21,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:12:21,122 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 35 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:12:21,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 380 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:12:21,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2022-07-21 17:12:21,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1669. [2022-07-21 17:12:21,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1423 states have (on average 1.202389318341532) internal successors, (1711), 1482 states have internal predecessors, (1711), 132 states have call successors, (132), 38 states have call predecessors, (132), 47 states have return successors, (191), 148 states have call predecessors, (191), 132 states have call successors, (191) [2022-07-21 17:12:21,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 2034 transitions. [2022-07-21 17:12:21,138 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 2034 transitions. Word has length 133 [2022-07-21 17:12:21,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:12:21,138 INFO L495 AbstractCegarLoop]: Abstraction has 1669 states and 2034 transitions. [2022-07-21 17:12:21,138 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) [2022-07-21 17:12:21,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 2034 transitions. [2022-07-21 17:12:21,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-07-21 17:12:21,139 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:12:21,139 INFO L195 NwaCegarLoop]: trace histogram [27, 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] [2022-07-21 17:12:21,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-21 17:12:21,357 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 [2022-07-21 17:12:21,357 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:12:21,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:12:21,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1098524561, now seen corresponding path program 1 times [2022-07-21 17:12:21,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:12:21,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978264908] [2022-07-21 17:12:21,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:21,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:12:21,383 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:12:21,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111911093] [2022-07-21 17:12:21,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:21,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:12:21,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:12:21,384 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) [2022-07-21 17:12:21,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-21 17:12:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:12:21,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 17:12:21,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:12:22,117 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-07-21 17:12:22,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:12:22,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:12:22,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978264908] [2022-07-21 17:12:22,117 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:12:22,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111911093] [2022-07-21 17:12:22,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111911093] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:12:22,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:12:22,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:12:22,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518000767] [2022-07-21 17:12:22,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:12:22,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:12:22,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:12:22,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:12:22,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:12:22,118 INFO L87 Difference]: Start difference. First operand 1669 states and 2034 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) [2022-07-21 17:12:22,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:12:22,338 INFO L93 Difference]: Finished difference Result 1785 states and 2170 transitions. [2022-07-21 17:12:22,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:12:22,338 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 137 [2022-07-21 17:12:22,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:12:22,342 INFO L225 Difference]: With dead ends: 1785 [2022-07-21 17:12:22,342 INFO L226 Difference]: Without dead ends: 1785 [2022-07-21 17:12:22,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:12:22,343 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 545 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:12:22,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 331 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:12:22,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2022-07-21 17:12:22,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1301. [2022-07-21 17:12:22,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1112 states have (on average 1.2176258992805755) internal successors, (1354), 1171 states have internal predecessors, (1354), 77 states have call successors, (77), 38 states have call predecessors, (77), 48 states have return successors, (117), 91 states have call predecessors, (117), 77 states have call successors, (117) [2022-07-21 17:12:22,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 1548 transitions. [2022-07-21 17:12:22,362 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 1548 transitions. Word has length 137 [2022-07-21 17:12:22,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:12:22,363 INFO L495 AbstractCegarLoop]: Abstraction has 1301 states and 1548 transitions. [2022-07-21 17:12:22,363 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) [2022-07-21 17:12:22,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 1548 transitions. [2022-07-21 17:12:22,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-07-21 17:12:22,365 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:12:22,365 INFO L195 NwaCegarLoop]: trace histogram [27, 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] [2022-07-21 17:12:22,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-21 17:12:22,585 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 [2022-07-21 17:12:22,586 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:12:22,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:12:22,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1098524562, now seen corresponding path program 1 times [2022-07-21 17:12:22,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:12:22,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583412855] [2022-07-21 17:12:22,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:22,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:12:22,614 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:12:22,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1476987368] [2022-07-21 17:12:22,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:22,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:12:22,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:12:22,616 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) [2022-07-21 17:12:22,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-21 17:12:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:12:23,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 17:12:23,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:12:23,461 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-07-21 17:12:23,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:12:23,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:12:23,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583412855] [2022-07-21 17:12:23,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:12:23,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476987368] [2022-07-21 17:12:23,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476987368] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:12:23,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:12:23,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:12:23,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488758104] [2022-07-21 17:12:23,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:12:23,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:12:23,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:12:23,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:12:23,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:12:23,464 INFO L87 Difference]: Start difference. First operand 1301 states and 1548 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) [2022-07-21 17:12:23,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:12:23,616 INFO L93 Difference]: Finished difference Result 1295 states and 1536 transitions. [2022-07-21 17:12:23,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:12:23,616 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 137 [2022-07-21 17:12:23,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:12:23,619 INFO L225 Difference]: With dead ends: 1295 [2022-07-21 17:12:23,619 INFO L226 Difference]: Without dead ends: 1295 [2022-07-21 17:12:23,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:12:23,620 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 353 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:12:23,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 331 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:12:23,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2022-07-21 17:12:23,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 1294. [2022-07-21 17:12:23,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1112 states have (on average 1.205935251798561) internal successors, (1341), 1164 states have internal predecessors, (1341), 77 states have call successors, (77), 38 states have call predecessors, (77), 48 states have return successors, (117), 91 states have call predecessors, (117), 77 states have call successors, (117) [2022-07-21 17:12:23,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 1535 transitions. [2022-07-21 17:12:23,636 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 1535 transitions. Word has length 137 [2022-07-21 17:12:23,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:12:23,636 INFO L495 AbstractCegarLoop]: Abstraction has 1294 states and 1535 transitions. [2022-07-21 17:12:23,636 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) [2022-07-21 17:12:23,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 1535 transitions. [2022-07-21 17:12:23,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-21 17:12:23,638 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:12:23,638 INFO L195 NwaCegarLoop]: trace histogram [27, 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] [2022-07-21 17:12:23,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-07-21 17:12:23,855 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 [2022-07-21 17:12:23,855 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:12:23,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:12:23,856 INFO L85 PathProgramCache]: Analyzing trace with hash 582971172, now seen corresponding path program 1 times [2022-07-21 17:12:23,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:12:23,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350057839] [2022-07-21 17:12:23,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:23,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:12:23,882 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:12:23,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1280022715] [2022-07-21 17:12:23,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:23,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:12:23,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:12:23,883 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) [2022-07-21 17:12:23,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-21 17:12:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:12:24,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-21 17:12:24,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:12:24,785 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 [2022-07-21 17:12:24,803 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 [2022-07-21 17:12:24,818 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-07-21 17:12:24,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:12:24,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:12:24,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350057839] [2022-07-21 17:12:24,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:12:24,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280022715] [2022-07-21 17:12:24,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280022715] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:12:24,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:12:24,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 17:12:24,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333418557] [2022-07-21 17:12:24,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:12:24,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 17:12:24,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:12:24,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 17:12:24,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:12:24,820 INFO L87 Difference]: Start difference. First operand 1294 states and 1535 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) [2022-07-21 17:12:25,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:12:25,313 INFO L93 Difference]: Finished difference Result 1609 states and 1901 transitions. [2022-07-21 17:12:25,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 17:12:25,313 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 141 [2022-07-21 17:12:25,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:12:25,317 INFO L225 Difference]: With dead ends: 1609 [2022-07-21 17:12:25,317 INFO L226 Difference]: Without dead ends: 1609 [2022-07-21 17:12:25,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-07-21 17:12:25,317 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 902 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:12:25,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [907 Valid, 1062 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 17:12:25,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2022-07-21 17:12:25,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1377. [2022-07-21 17:12:25,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1377 states, 1195 states have (on average 1.2443514644351465) internal successors, (1487), 1246 states have internal predecessors, (1487), 77 states have call successors, (77), 39 states have call predecessors, (77), 49 states have return successors, (117), 91 states have call predecessors, (117), 77 states have call successors, (117) [2022-07-21 17:12:25,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 1681 transitions. [2022-07-21 17:12:25,329 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 1681 transitions. Word has length 141 [2022-07-21 17:12:25,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:12:25,330 INFO L495 AbstractCegarLoop]: Abstraction has 1377 states and 1681 transitions. [2022-07-21 17:12:25,330 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) [2022-07-21 17:12:25,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 1681 transitions. [2022-07-21 17:12:25,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-21 17:12:25,331 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:12:25,331 INFO L195 NwaCegarLoop]: trace histogram [27, 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] [2022-07-21 17:12:25,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-21 17:12:25,550 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 [2022-07-21 17:12:25,551 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:12:25,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:12:25,551 INFO L85 PathProgramCache]: Analyzing trace with hash 582971173, now seen corresponding path program 1 times [2022-07-21 17:12:25,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:12:25,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173402679] [2022-07-21 17:12:25,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:25,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:12:25,579 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:12:25,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215064840] [2022-07-21 17:12:25,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:25,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:12:25,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:12:25,581 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) [2022-07-21 17:12:25,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-21 17:12:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:12:26,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-21 17:12:26,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:12:26,878 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 [2022-07-21 17:12:26,881 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 [2022-07-21 17:12:26,916 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 [2022-07-21 17:12:26,918 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 [2022-07-21 17:12:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-07-21 17:12:26,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:12:26,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:12:26,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173402679] [2022-07-21 17:12:26,986 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:12:26,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215064840] [2022-07-21 17:12:26,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215064840] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:12:26,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:12:26,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 17:12:26,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001056148] [2022-07-21 17:12:26,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:12:26,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 17:12:26,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:12:26,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 17:12:26,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:12:26,988 INFO L87 Difference]: Start difference. First operand 1377 states and 1681 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) [2022-07-21 17:12:27,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:12:27,632 INFO L93 Difference]: Finished difference Result 1643 states and 2027 transitions. [2022-07-21 17:12:27,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 17:12:27,633 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 141 [2022-07-21 17:12:27,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:12:27,635 INFO L225 Difference]: With dead ends: 1643 [2022-07-21 17:12:27,635 INFO L226 Difference]: Without dead ends: 1643 [2022-07-21 17:12:27,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-07-21 17:12:27,636 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 1237 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1237 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:12:27,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1237 Valid, 1012 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 17:12:27,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2022-07-21 17:12:27,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1562. [2022-07-21 17:12:27,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1379 states have (on average 1.3190717911530094) internal successors, (1819), 1431 states have internal predecessors, (1819), 77 states have call successors, (77), 39 states have call predecessors, (77), 50 states have return successors, (117), 91 states have call predecessors, (117), 77 states have call successors, (117) [2022-07-21 17:12:27,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 2013 transitions. [2022-07-21 17:12:27,649 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 2013 transitions. Word has length 141 [2022-07-21 17:12:27,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:12:27,649 INFO L495 AbstractCegarLoop]: Abstraction has 1562 states and 2013 transitions. [2022-07-21 17:12:27,649 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) [2022-07-21 17:12:27,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 2013 transitions. [2022-07-21 17:12:27,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-21 17:12:27,650 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:12:27,651 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] [2022-07-21 17:12:27,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-21 17:12:27,851 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 [2022-07-21 17:12:27,851 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:12:27,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:12:27,851 INFO L85 PathProgramCache]: Analyzing trace with hash -750138260, now seen corresponding path program 1 times [2022-07-21 17:12:27,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:12:27,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606410529] [2022-07-21 17:12:27,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:27,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:12:27,881 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:12:27,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554180995] [2022-07-21 17:12:27,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:27,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:12:27,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:12:27,883 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) [2022-07-21 17:12:27,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-21 17:12:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:12:28,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-21 17:12:28,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:12:28,530 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:12:28,531 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 [2022-07-21 17:12:28,579 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:12:28,579 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 [2022-07-21 17:12:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 481 proven. 6 refuted. 0 times theorem prover too weak. 690 trivial. 0 not checked. [2022-07-21 17:12:28,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:12:28,748 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 17:12:28,748 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 [2022-07-21 17:12:28,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 481 proven. 6 refuted. 0 times theorem prover too weak. 690 trivial. 0 not checked. [2022-07-21 17:12:28,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:12:28,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606410529] [2022-07-21 17:12:28,780 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:12:28,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554180995] [2022-07-21 17:12:28,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554180995] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:12:28,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:12:28,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-07-21 17:12:28,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771447103] [2022-07-21 17:12:28,780 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:12:28,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:12:28,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:12:28,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:12:28,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:12:28,781 INFO L87 Difference]: Start difference. First operand 1562 states and 2013 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) [2022-07-21 17:12:29,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:12:29,059 INFO L93 Difference]: Finished difference Result 1670 states and 2141 transitions. [2022-07-21 17:12:29,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 17:12:29,060 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 [2022-07-21 17:12:29,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:12:29,062 INFO L225 Difference]: With dead ends: 1670 [2022-07-21 17:12:29,062 INFO L226 Difference]: Without dead ends: 1670 [2022-07-21 17:12:29,063 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 [2022-07-21 17:12:29,063 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 330 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 270 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:12:29,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 1085 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 338 Invalid, 0 Unknown, 270 Unchecked, 0.2s Time] [2022-07-21 17:12:29,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2022-07-21 17:12:29,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1561. [2022-07-21 17:12:29,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1379 states have (on average 1.3132704858593183) internal successors, (1811), 1430 states have internal predecessors, (1811), 77 states have call successors, (77), 39 states have call predecessors, (77), 50 states have return successors, (117), 91 states have call predecessors, (117), 77 states have call successors, (117) [2022-07-21 17:12:29,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 2005 transitions. [2022-07-21 17:12:29,077 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 2005 transitions. Word has length 142 [2022-07-21 17:12:29,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:12:29,078 INFO L495 AbstractCegarLoop]: Abstraction has 1561 states and 2005 transitions. [2022-07-21 17:12:29,078 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) [2022-07-21 17:12:29,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 2005 transitions. [2022-07-21 17:12:29,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-21 17:12:29,079 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:12:29,079 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] [2022-07-21 17:12:29,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-21 17:12:29,295 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 [2022-07-21 17:12:29,295 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:12:29,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:12:29,296 INFO L85 PathProgramCache]: Analyzing trace with hash -750138259, now seen corresponding path program 1 times [2022-07-21 17:12:29,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:12:29,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690129120] [2022-07-21 17:12:29,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:29,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:12:29,325 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:12:29,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210541826] [2022-07-21 17:12:29,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:29,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:12:29,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:12:29,327 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) [2022-07-21 17:12:29,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-21 17:12:29,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:12:29,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-21 17:12:29,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:12:30,194 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 17:12:30,195 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 [2022-07-21 17:12:30,202 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 [2022-07-21 17:12:30,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:12:30,344 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 [2022-07-21 17:12:30,353 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-21 17:12:30,353 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 [2022-07-21 17:12:30,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 503 proven. 196 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2022-07-21 17:12:30,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:12:30,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:12:30,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690129120] [2022-07-21 17:12:30,496 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:12:30,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210541826] [2022-07-21 17:12:30,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210541826] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:12:30,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:12:30,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-07-21 17:12:30,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725727122] [2022-07-21 17:12:30,497 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 17:12:30,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 17:12:30,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:12:30,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 17:12:30,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-07-21 17:12:30,497 INFO L87 Difference]: Start difference. First operand 1561 states and 2005 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) [2022-07-21 17:12:31,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:12:31,529 INFO L93 Difference]: Finished difference Result 1811 states and 2322 transitions. [2022-07-21 17:12:31,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 17:12:31,530 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 [2022-07-21 17:12:31,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:12:31,532 INFO L225 Difference]: With dead ends: 1811 [2022-07-21 17:12:31,532 INFO L226 Difference]: Without dead ends: 1811 [2022-07-21 17:12:31,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 17:12:31,533 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 517 mSDsluCounter, 1336 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 1554 SdHoareTripleChecker+Invalid, 3030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1107 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 17:12:31,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 1554 Invalid, 3030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1784 Invalid, 0 Unknown, 1107 Unchecked, 0.8s Time] [2022-07-21 17:12:31,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2022-07-21 17:12:31,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1560. [2022-07-21 17:12:31,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1560 states, 1379 states have (on average 1.3074691805656273) internal successors, (1803), 1429 states have internal predecessors, (1803), 77 states have call successors, (77), 39 states have call predecessors, (77), 50 states have return successors, (117), 91 states have call predecessors, (117), 77 states have call successors, (117) [2022-07-21 17:12:31,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 1997 transitions. [2022-07-21 17:12:31,549 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 1997 transitions. Word has length 142 [2022-07-21 17:12:31,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:12:31,549 INFO L495 AbstractCegarLoop]: Abstraction has 1560 states and 1997 transitions. [2022-07-21 17:12:31,549 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) [2022-07-21 17:12:31,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 1997 transitions. [2022-07-21 17:12:31,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-21 17:12:31,550 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:12:31,550 INFO L195 NwaCegarLoop]: trace histogram [27, 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] [2022-07-21 17:12:31,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-21 17:12:31,762 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 [2022-07-21 17:12:31,763 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:12:31,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:12:31,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1553394941, now seen corresponding path program 1 times [2022-07-21 17:12:31,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:12:31,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838300055] [2022-07-21 17:12:31,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:31,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:12:31,791 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 17:12:31,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033734127] [2022-07-21 17:12:31,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:31,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:12:31,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:12:31,795 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) [2022-07-21 17:12:31,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-21 17:12:32,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:12:32,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 1229 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-21 17:12:32,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:12:32,547 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:12:32,547 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 [2022-07-21 17:12:33,175 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 [2022-07-21 17:12:33,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:12:33,239 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 [2022-07-21 17:12:33,258 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 [2022-07-21 17:12:33,268 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 [2022-07-21 17:12:33,307 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 [2022-07-21 17:12:33,370 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:12:33,371 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 [2022-07-21 17:12:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-07-21 17:12:33,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:12:33,485 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 [2022-07-21 17:12:35,502 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (= |c_~#list~0.offset| |c_ULTIMATE.start_l0_insert_~list#1.offset|)) (.cse0 (= |c_~#list~0.base| |c_ULTIMATE.start_l0_insert_~list#1.base|))) (or (and (or (not .cse0) (not .cse1)) (forall ((v_arrayElimCell_211 Int)) (= (select |c_#valid| (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_l0_insert_~list#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_l0_insert_~list#1.base|) |c_ULTIMATE.start_l0_insert_~list#1.offset| |c_ULTIMATE.start_l0_insert_~item~4#1.base|)))) (select .cse2 (select (select .cse2 |c_~#list~0.base|) |c_~#list~0.offset|))) (+ v_arrayElimCell_211 4))) 1))) (and (= (select |c_#valid| (select (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_l0_insert_~list#1.base| (store (select |c_#memory_$Pointer$.base| |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 .cse3 (select (select .cse3 |c_~#list~0.base|) |c_~#list~0.offset|))) (+ |c_ULTIMATE.start_l0_insert_~item~4#1.offset| 4))) 1) .cse1 .cse0))) is different from false [2022-07-21 17:12:50,180 INFO L356 Elim1Store]: treesize reduction 196, result has 54.3 percent of original size [2022-07-21 17:12:50,181 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 121901 treesize of output 117129 [2022-07-21 17:12:54,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:12:54,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838300055] [2022-07-21 17:12:54,401 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:12:54,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033734127] [2022-07-21 17:12:54,401 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-21 17:12:54,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-07-21 17:12:54,610 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 [2022-07-21 17:12:54,611 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) [2022-07-21 17:12:54,614 INFO L158 Benchmark]: Toolchain (without parser) took 224817.57ms. Allocated memory was 60.8MB in the beginning and 505.4MB in the end (delta: 444.6MB). Free memory was 42.4MB in the beginning and 127.5MB in the end (delta: -85.1MB). Peak memory consumption was 399.5MB. Max. memory is 16.1GB. [2022-07-21 17:12:54,614 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 60.8MB. Free memory was 43.8MB in the beginning and 43.8MB in the end (delta: 54.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 17:12:54,614 INFO L158 Benchmark]: CACSL2BoogieTranslator took 318.09ms. Allocated memory is still 60.8MB. Free memory was 42.3MB in the beginning and 37.4MB in the end (delta: 4.9MB). Peak memory consumption was 21.7MB. Max. memory is 16.1GB. [2022-07-21 17:12:54,615 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.72ms. Allocated memory is still 60.8MB. Free memory was 37.4MB in the beginning and 34.4MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-21 17:12:54,615 INFO L158 Benchmark]: Boogie Preprocessor took 32.28ms. Allocated memory is still 60.8MB. Free memory was 34.4MB in the beginning and 32.1MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 17:12:54,615 INFO L158 Benchmark]: RCFGBuilder took 620.93ms. Allocated memory was 60.8MB in the beginning and 83.9MB in the end (delta: 23.1MB). Free memory was 31.9MB in the beginning and 41.8MB in the end (delta: -9.9MB). Peak memory consumption was 13.8MB. Max. memory is 16.1GB. [2022-07-21 17:12:54,615 INFO L158 Benchmark]: TraceAbstraction took 223793.43ms. Allocated memory was 83.9MB in the beginning and 505.4MB in the end (delta: 421.5MB). Free memory was 41.5MB in the beginning and 127.5MB in the end (delta: -86.0MB). Peak memory consumption was 372.4MB. Max. memory is 16.1GB. [2022-07-21 17:12:54,615 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 60.8MB. Free memory was 43.8MB in the beginning and 43.8MB in the end (delta: 54.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 318.09ms. Allocated memory is still 60.8MB. Free memory was 42.3MB in the beginning and 37.4MB in the end (delta: 4.9MB). Peak memory consumption was 21.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.72ms. Allocated memory is still 60.8MB. Free memory was 37.4MB in the beginning and 34.4MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.28ms. Allocated memory is still 60.8MB. Free memory was 34.4MB in the beginning and 32.1MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 620.93ms. Allocated memory was 60.8MB in the beginning and 83.9MB in the end (delta: 23.1MB). Free memory was 31.9MB in the beginning and 41.8MB in the end (delta: -9.9MB). Peak memory consumption was 13.8MB. Max. memory is 16.1GB. * TraceAbstraction took 223793.43ms. Allocated memory was 83.9MB in the beginning and 505.4MB in the end (delta: 421.5MB). Free memory was 41.5MB in the beginning and 127.5MB in the end (delta: -86.0MB). Peak memory consumption was 372.4MB. 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. [2022-07-21 17:12:54,716 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-0235-2.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 5243781ee83706d005235269371a592cabf9c2dbc613c235cbe81d6e89d326d7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:12:56,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:12:56,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:12:56,290 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:12:56,291 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:12:56,292 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:12:56,296 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:12:56,299 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:12:56,300 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:12:56,304 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:12:56,305 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:12:56,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:12:56,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:12:56,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:12:56,310 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:12:56,310 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:12:56,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:12:56,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:12:56,317 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:12:56,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:12:56,322 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:12:56,323 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:12:56,324 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:12:56,325 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:12:56,326 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:12:56,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:12:56,331 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:12:56,332 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:12:56,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:12:56,333 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:12:56,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:12:56,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:12:56,335 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:12:56,335 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:12:56,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:12:56,337 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:12:56,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:12:56,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:12:56,338 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:12:56,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:12:56,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:12:56,339 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:12:56,345 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-21 17:12:56,376 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:12:56,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:12:56,377 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:12:56,377 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:12:56,378 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:12:56,378 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:12:56,379 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:12:56,379 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:12:56,379 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:12:56,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:12:56,380 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:12:56,380 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:12:56,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:12:56,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:12:56,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:12:56,381 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:12:56,381 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:12:56,381 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:12:56,381 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:12:56,382 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:12:56,382 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-21 17:12:56,382 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-21 17:12:56,382 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:12:56,382 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:12:56,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:12:56,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:12:56,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:12:56,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:12:56,383 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:12:56,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:12:56,384 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-21 17:12:56,384 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-21 17:12:56,384 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-21 17:12:56,384 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5243781ee83706d005235269371a592cabf9c2dbc613c235cbe81d6e89d326d7 [2022-07-21 17:12:56,650 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:12:56,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:12:56,672 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:12:56,672 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:12:56,673 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:12:56,674 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0235-2.i [2022-07-21 17:12:56,724 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51a6e626c/fab119f237f143ef97023956c57eb76c/FLAGa6c86bd18 [2022-07-21 17:12:57,084 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:12:57,084 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0235-2.i [2022-07-21 17:12:57,096 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51a6e626c/fab119f237f143ef97023956c57eb76c/FLAGa6c86bd18 [2022-07-21 17:12:57,468 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51a6e626c/fab119f237f143ef97023956c57eb76c [2022-07-21 17:12:57,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:12:57,471 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:12:57,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:12:57,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:12:57,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:12:57,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:12:57" (1/1) ... [2022-07-21 17:12:57,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@619d6b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:12:57, skipping insertion in model container [2022-07-21 17:12:57,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:12:57" (1/1) ... [2022-07-21 17:12:57,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:12:57,521 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:12:57,823 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:12:57,831 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 17:12:57,874 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:12:57,918 INFO L208 MainTranslator]: Completed translation [2022-07-21 17:12:57,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:12:57 WrapperNode [2022-07-21 17:12:57,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:12:57,920 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 17:12:57,920 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 17:12:57,920 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 17:12:57,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:12:57" (1/1) ... [2022-07-21 17:12:57,956 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:12:57" (1/1) ... [2022-07-21 17:12:57,984 INFO L137 Inliner]: procedures = 189, calls = 71, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 233 [2022-07-21 17:12:57,984 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 17:12:57,986 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 17:12:57,986 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 17:12:57,986 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 17:12:57,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:12:57" (1/1) ... [2022-07-21 17:12:57,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:12:57" (1/1) ... [2022-07-21 17:12:58,002 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:12:57" (1/1) ... [2022-07-21 17:12:58,002 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:12:57" (1/1) ... [2022-07-21 17:12:58,016 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:12:57" (1/1) ... [2022-07-21 17:12:58,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:12:57" (1/1) ... [2022-07-21 17:12:58,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:12:57" (1/1) ... [2022-07-21 17:12:58,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 17:12:58,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 17:12:58,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 17:12:58,027 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 17:12:58,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:12:57" (1/1) ... [2022-07-21 17:12:58,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:12:58,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:12:58,052 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 17:12:58,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 17:12:58,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 17:12:58,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 17:12:58,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 17:12:58,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 17:12:58,087 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2022-07-21 17:12:58,087 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2022-07-21 17:12:58,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 17:12:58,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-21 17:12:58,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-21 17:12:58,088 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2022-07-21 17:12:58,088 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2022-07-21 17:12:58,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 17:12:58,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 17:12:58,214 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 17:12:58,215 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 17:12:58,774 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 17:12:58,780 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 17:12:58,780 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-07-21 17:12:58,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:12:58 BoogieIcfgContainer [2022-07-21 17:12:58,782 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 17:12:58,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 17:12:58,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 17:12:58,785 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 17:12:58,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:12:57" (1/3) ... [2022-07-21 17:12:58,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b0e5136 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:12:58, skipping insertion in model container [2022-07-21 17:12:58,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:12:57" (2/3) ... [2022-07-21 17:12:58,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b0e5136 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:12:58, skipping insertion in model container [2022-07-21 17:12:58,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:12:58" (3/3) ... [2022-07-21 17:12:58,800 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0235-2.i [2022-07-21 17:12:58,809 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 17:12:58,809 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 87 error locations. [2022-07-21 17:12:58,842 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 17:12:58,865 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@524a3565, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3f16af8b [2022-07-21 17:12:58,866 INFO L358 AbstractCegarLoop]: Starting to check reachability of 87 error locations. [2022-07-21 17:12:58,876 INFO L276 IsEmpty]: Start isEmpty. Operand has 233 states, 131 states have (on average 1.9083969465648856) internal successors, (250), 218 states have internal predecessors, (250), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-21 17:12:58,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-21 17:12:58,889 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:12:58,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-21 17:12:58,890 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:12:58,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:12:58,893 INFO L85 PathProgramCache]: Analyzing trace with hash 929958, now seen corresponding path program 1 times [2022-07-21 17:12:58,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:12:58,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416546814] [2022-07-21 17:12:58,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:58,901 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:12:58,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:12:58,902 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) [2022-07-21 17:12:58,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-21 17:12:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:12:58,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-21 17:12:58,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:12:58,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:12:58,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:12:58,972 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:12:58,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416546814] [2022-07-21 17:12:58,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416546814] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:12:58,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:12:58,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:12:58,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065660438] [2022-07-21 17:12:58,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:12:58,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 17:12:58,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:12:59,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 17:12:59,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 17:12:59,008 INFO L87 Difference]: Start difference. First operand has 233 states, 131 states have (on average 1.9083969465648856) internal successors, (250), 218 states have internal predecessors, (250), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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) [2022-07-21 17:12:59,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:12:59,045 INFO L93 Difference]: Finished difference Result 233 states and 263 transitions. [2022-07-21 17:12:59,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 17:12:59,046 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 [2022-07-21 17:12:59,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:12:59,054 INFO L225 Difference]: With dead ends: 233 [2022-07-21 17:12:59,054 INFO L226 Difference]: Without dead ends: 231 [2022-07-21 17:12:59,055 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 [2022-07-21 17:12:59,057 INFO L413 NwaCegarLoop]: 263 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, 263 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 [2022-07-21 17:12:59,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:12:59,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-21 17:12:59,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-07-21 17:12:59,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 130 states have (on average 1.823076923076923) internal successors, (237), 216 states have internal predecessors, (237), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-21 17:12:59,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 261 transitions. [2022-07-21 17:12:59,091 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 261 transitions. Word has length 4 [2022-07-21 17:12:59,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:12:59,091 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 261 transitions. [2022-07-21 17:12:59,091 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) [2022-07-21 17:12:59,091 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 261 transitions. [2022-07-21 17:12:59,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 17:12:59,092 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:12:59,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 17:12:59,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-21 17:12:59,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:12:59,297 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:12:59,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:12:59,297 INFO L85 PathProgramCache]: Analyzing trace with hash 889932981, now seen corresponding path program 1 times [2022-07-21 17:12:59,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:12:59,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135479364] [2022-07-21 17:12:59,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:59,298 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:12:59,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:12:59,299 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) [2022-07-21 17:12:59,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-21 17:12:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:12:59,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:12:59,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:12:59,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:12:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:12:59,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:12:59,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:12:59,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [135479364] [2022-07-21 17:12:59,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [135479364] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:12:59,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:12:59,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:12:59,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983557208] [2022-07-21 17:12:59,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:12:59,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:12:59,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:12:59,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:12:59,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:12:59,440 INFO L87 Difference]: Start difference. First operand 231 states and 261 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) [2022-07-21 17:12:59,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:12:59,653 INFO L93 Difference]: Finished difference Result 230 states and 260 transitions. [2022-07-21 17:12:59,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:12:59,654 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 [2022-07-21 17:12:59,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:12:59,656 INFO L225 Difference]: With dead ends: 230 [2022-07-21 17:12:59,656 INFO L226 Difference]: Without dead ends: 230 [2022-07-21 17:12:59,656 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 [2022-07-21 17:12:59,657 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 9 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:12:59,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 418 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:12:59,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-07-21 17:12:59,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2022-07-21 17:12:59,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 130 states have (on average 1.8153846153846154) internal successors, (236), 215 states have internal predecessors, (236), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-21 17:12:59,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 260 transitions. [2022-07-21 17:12:59,670 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 260 transitions. Word has length 6 [2022-07-21 17:12:59,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:12:59,671 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 260 transitions. [2022-07-21 17:12:59,671 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) [2022-07-21 17:12:59,671 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 260 transitions. [2022-07-21 17:12:59,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 17:12:59,671 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:12:59,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:12:59,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-07-21 17:12:59,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:12:59,875 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:12:59,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:12:59,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1818119056, now seen corresponding path program 1 times [2022-07-21 17:12:59,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:12:59,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678344870] [2022-07-21 17:12:59,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:12:59,877 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:12:59,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:12:59,878 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) [2022-07-21 17:12:59,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-21 17:12:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:12:59,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 17:12:59,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:12:59,973 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 6 treesize of output 5 [2022-07-21 17:12:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:12:59,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:12:59,997 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:12:59,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678344870] [2022-07-21 17:12:59,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678344870] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:12:59,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:12:59,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:12:59,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257376638] [2022-07-21 17:12:59,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:12:59,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:12:59,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:12:59,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:12:59,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:12:59,999 INFO L87 Difference]: Start difference. First operand 230 states and 260 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) [2022-07-21 17:13:00,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:13:00,230 INFO L93 Difference]: Finished difference Result 239 states and 269 transitions. [2022-07-21 17:13:00,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:13:00,231 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 [2022-07-21 17:13:00,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:13:00,232 INFO L225 Difference]: With dead ends: 239 [2022-07-21 17:13:00,232 INFO L226 Difference]: Without dead ends: 239 [2022-07-21 17:13:00,232 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 [2022-07-21 17:13:00,233 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 16 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:13:00,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 678 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:13:00,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-07-21 17:13:00,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2022-07-21 17:13:00,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 138 states have (on average 1.7753623188405796) internal successors, (245), 223 states have internal predecessors, (245), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-21 17:13:00,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 269 transitions. [2022-07-21 17:13:00,244 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 269 transitions. Word has length 7 [2022-07-21 17:13:00,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:13:00,244 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 269 transitions. [2022-07-21 17:13:00,244 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) [2022-07-21 17:13:00,245 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 269 transitions. [2022-07-21 17:13:00,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 17:13:00,246 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:13:00,246 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] [2022-07-21 17:13:00,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-21 17:13:00,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:13:00,453 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:13:00,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:13:00,453 INFO L85 PathProgramCache]: Analyzing trace with hash 253014343, now seen corresponding path program 1 times [2022-07-21 17:13:00,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:13:00,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [407897507] [2022-07-21 17:13:00,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:13:00,454 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:13:00,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:13:00,456 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) [2022-07-21 17:13:00,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-21 17:13:00,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:13:00,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 17:13:00,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:13:00,702 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-21 17:13:00,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:13:00,703 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:13:00,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [407897507] [2022-07-21 17:13:00,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [407897507] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:13:00,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:13:00,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:13:00,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488848396] [2022-07-21 17:13:00,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:13:00,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:13:00,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:13:00,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:13:00,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:13:00,705 INFO L87 Difference]: Start difference. First operand 239 states and 269 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) [2022-07-21 17:13:00,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:13:00,761 INFO L93 Difference]: Finished difference Result 251 states and 281 transitions. [2022-07-21 17:13:00,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:13:00,762 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 [2022-07-21 17:13:00,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:13:00,763 INFO L225 Difference]: With dead ends: 251 [2022-07-21 17:13:00,763 INFO L226 Difference]: Without dead ends: 241 [2022-07-21 17:13:00,764 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 [2022-07-21 17:13:00,764 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 18 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:13:00,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 736 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:13:00,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-07-21 17:13:00,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2022-07-21 17:13:00,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 140 states have (on average 1.7642857142857142) internal successors, (247), 225 states have internal predecessors, (247), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-21 17:13:00,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 271 transitions. [2022-07-21 17:13:00,772 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 271 transitions. Word has length 66 [2022-07-21 17:13:00,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:13:00,773 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 271 transitions. [2022-07-21 17:13:00,773 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) [2022-07-21 17:13:00,773 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 271 transitions. [2022-07-21 17:13:00,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-21 17:13:00,774 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:13:00,774 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] [2022-07-21 17:13:00,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-21 17:13:00,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:13:00,985 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:13:00,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:13:00,985 INFO L85 PathProgramCache]: Analyzing trace with hash 851001466, now seen corresponding path program 1 times [2022-07-21 17:13:00,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:13:00,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34162546] [2022-07-21 17:13:00,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:13:00,986 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:13:00,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:13:00,988 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) [2022-07-21 17:13:00,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-21 17:13:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:13:01,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 17:13:01,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:13:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 51 proven. 1 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-07-21 17:13:01,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:13:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-07-21 17:13:01,410 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:13:01,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34162546] [2022-07-21 17:13:01,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34162546] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:13:01,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:13:01,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-21 17:13:01,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519091271] [2022-07-21 17:13:01,411 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:13:01,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:13:01,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:13:01,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:13:01,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:13:01,412 INFO L87 Difference]: Start difference. First operand 241 states and 271 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) [2022-07-21 17:13:01,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:13:01,623 INFO L93 Difference]: Finished difference Result 260 states and 291 transitions. [2022-07-21 17:13:01,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 17:13:01,624 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 [2022-07-21 17:13:01,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:13:01,625 INFO L225 Difference]: With dead ends: 260 [2022-07-21 17:13:01,625 INFO L226 Difference]: Without dead ends: 245 [2022-07-21 17:13:01,625 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 [2022-07-21 17:13:01,626 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 39 mSDsluCounter, 1455 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1706 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:13:01,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 1706 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:13:01,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-07-21 17:13:01,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2022-07-21 17:13:01,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 144 states have (on average 1.7430555555555556) internal successors, (251), 229 states have internal predecessors, (251), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-21 17:13:01,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 275 transitions. [2022-07-21 17:13:01,632 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 275 transitions. Word has length 71 [2022-07-21 17:13:01,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:13:01,632 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 275 transitions. [2022-07-21 17:13:01,633 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) [2022-07-21 17:13:01,633 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 275 transitions. [2022-07-21 17:13:01,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-21 17:13:01,634 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:13:01,634 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] [2022-07-21 17:13:01,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-07-21 17:13:01,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:13:01,845 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:13:01,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:13:01,846 INFO L85 PathProgramCache]: Analyzing trace with hash 678119687, now seen corresponding path program 2 times [2022-07-21 17:13:01,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:13:01,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [28701179] [2022-07-21 17:13:01,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:13:01,847 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:13:01,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:13:01,855 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) [2022-07-21 17:13:01,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-21 17:13:01,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 17:13:01,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:13:02,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 17:13:02,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:13:02,041 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 [2022-07-21 17:13:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-07-21 17:13:02,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:13:02,144 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:13:02,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [28701179] [2022-07-21 17:13:02,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [28701179] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:13:02,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:13:02,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:13:02,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681309040] [2022-07-21 17:13:02,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:13:02,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:13:02,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:13:02,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:13:02,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:13:02,146 INFO L87 Difference]: Start difference. First operand 245 states and 275 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) [2022-07-21 17:13:02,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:13:02,150 INFO L93 Difference]: Finished difference Result 244 states and 274 transitions. [2022-07-21 17:13:02,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:13:02,150 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 [2022-07-21 17:13:02,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:13:02,151 INFO L225 Difference]: With dead ends: 244 [2022-07-21 17:13:02,151 INFO L226 Difference]: Without dead ends: 244 [2022-07-21 17:13:02,151 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 [2022-07-21 17:13:02,152 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 0 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:13:02,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 443 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 72 Unchecked, 0.0s Time] [2022-07-21 17:13:02,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-07-21 17:13:02,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2022-07-21 17:13:02,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 144 states have (on average 1.7361111111111112) internal successors, (250), 228 states have internal predecessors, (250), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-21 17:13:02,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 274 transitions. [2022-07-21 17:13:02,158 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 274 transitions. Word has length 86 [2022-07-21 17:13:02,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:13:02,158 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 274 transitions. [2022-07-21 17:13:02,158 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) [2022-07-21 17:13:02,158 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 274 transitions. [2022-07-21 17:13:02,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-21 17:13:02,159 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:13:02,159 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] [2022-07-21 17:13:02,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-21 17:13:02,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:13:02,366 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:13:02,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:13:02,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1975385078, now seen corresponding path program 1 times [2022-07-21 17:13:02,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:13:02,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1997337628] [2022-07-21 17:13:02,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:13:02,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:13:02,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:13:02,369 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) [2022-07-21 17:13:02,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-21 17:13:02,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:13:02,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 17:13:02,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:13:02,698 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 155 proven. 10 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-07-21 17:13:02,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:13:02,971 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2022-07-21 17:13:02,972 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:13:02,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1997337628] [2022-07-21 17:13:02,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1997337628] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:13:02,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:13:02,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-21 17:13:02,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489678097] [2022-07-21 17:13:02,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:13:02,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 17:13:02,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:13:02,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 17:13:02,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2022-07-21 17:13:02,981 INFO L87 Difference]: Start difference. First operand 244 states and 274 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) [2022-07-21 17:13:03,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:13:03,480 INFO L93 Difference]: Finished difference Result 276 states and 308 transitions. [2022-07-21 17:13:03,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 17:13:03,481 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 [2022-07-21 17:13:03,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:13:03,482 INFO L225 Difference]: With dead ends: 276 [2022-07-21 17:13:03,482 INFO L226 Difference]: Without dead ends: 251 [2022-07-21 17:13:03,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2022-07-21 17:13:03,483 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 66 mSDsluCounter, 1992 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 2251 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:13:03,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 2251 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:13:03,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-07-21 17:13:03,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2022-07-21 17:13:03,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 151 states have (on average 1.7019867549668874) internal successors, (257), 235 states have internal predecessors, (257), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-21 17:13:03,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 281 transitions. [2022-07-21 17:13:03,489 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 281 transitions. Word has length 95 [2022-07-21 17:13:03,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:13:03,489 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 281 transitions. [2022-07-21 17:13:03,489 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) [2022-07-21 17:13:03,489 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 281 transitions. [2022-07-21 17:13:03,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-21 17:13:03,490 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:13:03,490 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] [2022-07-21 17:13:03,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-21 17:13:03,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:13:03,703 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:13:03,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:13:03,704 INFO L85 PathProgramCache]: Analyzing trace with hash -2117878513, now seen corresponding path program 2 times [2022-07-21 17:13:03,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:13:03,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1693040077] [2022-07-21 17:13:03,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:13:03,705 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:13:03,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:13:03,706 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) [2022-07-21 17:13:03,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-21 17:13:04,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:13:04,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:13:04,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 17:13:04,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:13:04,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 305 proven. 15 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-07-21 17:13:04,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:13:05,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 305 proven. 15 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-07-21 17:13:05,159 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:13:05,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1693040077] [2022-07-21 17:13:05,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1693040077] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:13:05,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:13:05,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-21 17:13:05,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217867987] [2022-07-21 17:13:05,160 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:13:05,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 17:13:05,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:13:05,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 17:13:05,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-07-21 17:13:05,161 INFO L87 Difference]: Start difference. First operand 251 states and 281 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) [2022-07-21 17:13:05,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:13:05,838 INFO L93 Difference]: Finished difference Result 268 states and 303 transitions. [2022-07-21 17:13:05,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 17:13:05,839 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 [2022-07-21 17:13:05,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:13:05,841 INFO L225 Difference]: With dead ends: 268 [2022-07-21 17:13:05,841 INFO L226 Difference]: Without dead ends: 258 [2022-07-21 17:13:05,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=345, Invalid=647, Unknown=0, NotChecked=0, Total=992 [2022-07-21 17:13:05,842 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 121 mSDsluCounter, 1751 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 2004 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:13:05,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 2004 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:13:05,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-07-21 17:13:05,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2022-07-21 17:13:05,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 158 states have (on average 1.6708860759493671) internal successors, (264), 242 states have internal predecessors, (264), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-21 17:13:05,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 288 transitions. [2022-07-21 17:13:05,847 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 288 transitions. Word has length 118 [2022-07-21 17:13:05,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:13:05,848 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 288 transitions. [2022-07-21 17:13:05,848 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) [2022-07-21 17:13:05,848 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 288 transitions. [2022-07-21 17:13:05,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-21 17:13:05,849 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:13:05,849 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] [2022-07-21 17:13:05,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-21 17:13:06,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:13:06,063 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:13:06,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:13:06,064 INFO L85 PathProgramCache]: Analyzing trace with hash 88396650, now seen corresponding path program 3 times [2022-07-21 17:13:06,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:13:06,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852609623] [2022-07-21 17:13:06,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:13:06,065 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:13:06,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:13:06,066 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) [2022-07-21 17:13:06,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-21 17:13:06,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 17:13:06,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:13:06,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 17:13:06,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:13:06,474 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-21 17:13:06,474 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 17 [2022-07-21 17:13:06,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 853 proven. 124 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2022-07-21 17:13:06,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:13:06,726 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 17:13:06,726 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 [2022-07-21 17:13:06,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 853 proven. 124 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2022-07-21 17:13:06,743 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:13:06,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852609623] [2022-07-21 17:13:06,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852609623] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:13:06,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:13:06,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2022-07-21 17:13:06,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293933268] [2022-07-21 17:13:06,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:13:06,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 17:13:06,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:13:06,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 17:13:06,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:13:06,745 INFO L87 Difference]: Start difference. First operand 258 states and 288 transitions. Second operand has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2022-07-21 17:13:07,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:13:07,460 INFO L93 Difference]: Finished difference Result 265 states and 299 transitions. [2022-07-21 17:13:07,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 17:13:07,461 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 [2022-07-21 17:13:07,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:13:07,463 INFO L225 Difference]: With dead ends: 265 [2022-07-21 17:13:07,463 INFO L226 Difference]: Without dead ends: 265 [2022-07-21 17:13:07,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 235 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2022-07-21 17:13:07,464 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 91 mSDsluCounter, 1329 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1559 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:13:07,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1559 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 663 Invalid, 0 Unknown, 124 Unchecked, 0.6s Time] [2022-07-21 17:13:07,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-07-21 17:13:07,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 256. [2022-07-21 17:13:07,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 158 states have (on average 1.6582278481012658) internal successors, (262), 240 states have internal predecessors, (262), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-21 17:13:07,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 286 transitions. [2022-07-21 17:13:07,469 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 286 transitions. Word has length 125 [2022-07-21 17:13:07,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:13:07,470 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 286 transitions. [2022-07-21 17:13:07,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2022-07-21 17:13:07,470 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 286 transitions. [2022-07-21 17:13:07,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-21 17:13:07,471 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:13:07,471 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] [2022-07-21 17:13:07,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-21 17:13:07,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:13:07,671 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:13:07,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:13:07,672 INFO L85 PathProgramCache]: Analyzing trace with hash 88396651, now seen corresponding path program 1 times [2022-07-21 17:13:07,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:13:07,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614135971] [2022-07-21 17:13:07,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:13:07,672 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:13:07,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:13:07,674 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) [2022-07-21 17:13:07,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-21 17:13:08,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:13:08,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-21 17:13:08,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:13:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 620 proven. 78 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-07-21 17:13:09,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:13:09,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 620 proven. 78 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-07-21 17:13:09,841 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:13:09,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614135971] [2022-07-21 17:13:09,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614135971] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:13:09,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:13:09,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-07-21 17:13:09,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199924208] [2022-07-21 17:13:09,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:13:09,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 17:13:09,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:13:09,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 17:13:09,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2022-07-21 17:13:09,843 INFO L87 Difference]: Start difference. First operand 256 states and 286 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) [2022-07-21 17:13:12,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:13:12,628 INFO L93 Difference]: Finished difference Result 304 states and 365 transitions. [2022-07-21 17:13:12,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 17:13:12,639 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 [2022-07-21 17:13:12,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:13:12,641 INFO L225 Difference]: With dead ends: 304 [2022-07-21 17:13:12,641 INFO L226 Difference]: Without dead ends: 294 [2022-07-21 17:13:12,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1195, Invalid=2345, Unknown=0, NotChecked=0, Total=3540 [2022-07-21 17:13:12,643 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 379 mSDsluCounter, 4334 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 4597 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:13:12,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 4597 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-21 17:13:12,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-07-21 17:13:12,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 274. [2022-07-21 17:13:12,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 176 states have (on average 1.6079545454545454) internal successors, (283), 258 states have internal predecessors, (283), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-21 17:13:12,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 307 transitions. [2022-07-21 17:13:12,649 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 307 transitions. Word has length 125 [2022-07-21 17:13:12,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:13:12,650 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 307 transitions. [2022-07-21 17:13:12,650 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) [2022-07-21 17:13:12,650 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 307 transitions. [2022-07-21 17:13:12,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-07-21 17:13:12,651 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:13:12,651 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] [2022-07-21 17:13:12,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-21 17:13:12,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:13:12,868 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-21 17:13:12,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:13:12,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1620358197, now seen corresponding path program 2 times [2022-07-21 17:13:12,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:13:12,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1136673297] [2022-07-21 17:13:12,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:13:12,869 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:13:12,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:13:12,870 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) [2022-07-21 17:13:12,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-21 17:13:14,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:13:14,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:13:14,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-21 17:13:14,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:13:14,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2676 backedges. 1250 proven. 351 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-07-21 17:13:14,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:13:16,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2676 backedges. 1250 proven. 351 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2022-07-21 17:13:16,802 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:13:16,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1136673297] [2022-07-21 17:13:16,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1136673297] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:13:16,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:13:16,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2022-07-21 17:13:16,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025601625] [2022-07-21 17:13:16,803 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:13:16,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-21 17:13:16,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:13:16,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-21 17:13:16,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=958, Invalid=2582, Unknown=0, NotChecked=0, Total=3540 [2022-07-21 17:13:16,805 INFO L87 Difference]: Start difference. First operand 274 states and 307 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)