./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0235-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0235-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6e8dd9d71aae7a8c83467a9093ad4bffb4ddd59cddc2d90362f34ff651f24f9a --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:36:58,268 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:36:58,269 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:36:58,288 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:36:58,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:36:58,289 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:36:58,290 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:36:58,292 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:36:58,294 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:36:58,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:36:58,295 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:36:58,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:36:58,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:36:58,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:36:58,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:36:58,300 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:36:58,300 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:36:58,301 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:36:58,303 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:36:58,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:36:58,305 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:36:58,316 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:36:58,317 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:36:58,317 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:36:58,318 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:36:58,320 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:36:58,320 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:36:58,320 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:36:58,321 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:36:58,321 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:36:58,322 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:36:58,322 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:36:58,322 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:36:58,323 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:36:58,323 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:36:58,324 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:36:58,324 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:36:58,324 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:36:58,325 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:36:58,325 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:36:58,335 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:36:58,336 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:36:58,336 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-12 18:36:58,349 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:36:58,352 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:36:58,353 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:36:58,353 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:36:58,353 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:36:58,354 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:36:58,354 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:36:58,354 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:36:58,354 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:36:58,355 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:36:58,355 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:36:58,355 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:36:58,355 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:36:58,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:36:58,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:36:58,356 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:36:58,356 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:36:58,356 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:36:58,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:36:58,357 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:36:58,357 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:36:58,357 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:36:58,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:36:58,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:36:58,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:36:58,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:36:58,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:36:58,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:36:58,358 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 18:36:58,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 18:36:58,359 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e8dd9d71aae7a8c83467a9093ad4bffb4ddd59cddc2d90362f34ff651f24f9a [2022-07-12 18:36:58,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:36:58,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:36:58,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:36:58,579 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:36:58,580 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:36:58,581 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0235-1.i [2022-07-12 18:36:58,617 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35b71b55d/7252fc328eea4874acae1732f25a8a2b/FLAG5661e4e0e [2022-07-12 18:36:59,005 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:36:59,006 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0235-1.i [2022-07-12 18:36:59,018 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35b71b55d/7252fc328eea4874acae1732f25a8a2b/FLAG5661e4e0e [2022-07-12 18:36:59,402 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35b71b55d/7252fc328eea4874acae1732f25a8a2b [2022-07-12 18:36:59,404 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:36:59,404 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:36:59,406 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:36:59,406 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:36:59,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:36:59,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:36:59" (1/1) ... [2022-07-12 18:36:59,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79f67fc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:36:59, skipping insertion in model container [2022-07-12 18:36:59,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:36:59" (1/1) ... [2022-07-12 18:36:59,415 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:36:59,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:36:59,757 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:36:59,765 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 18:36:59,818 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:36:59,852 INFO L208 MainTranslator]: Completed translation [2022-07-12 18:36:59,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:36:59 WrapperNode [2022-07-12 18:36:59,852 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:36:59,853 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 18:36:59,853 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 18:36:59,854 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 18:36:59,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:36:59" (1/1) ... [2022-07-12 18:36:59,885 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:36:59" (1/1) ... [2022-07-12 18:36:59,912 INFO L137 Inliner]: procedures = 188, calls = 69, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 234 [2022-07-12 18:36:59,912 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 18:36:59,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 18:36:59,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 18:36:59,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 18:36:59,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:36:59" (1/1) ... [2022-07-12 18:36:59,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:36:59" (1/1) ... [2022-07-12 18:36:59,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:36:59" (1/1) ... [2022-07-12 18:36:59,930 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:36:59" (1/1) ... [2022-07-12 18:36:59,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:36:59" (1/1) ... [2022-07-12 18:36:59,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:36:59" (1/1) ... [2022-07-12 18:36:59,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:36:59" (1/1) ... [2022-07-12 18:36:59,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 18:36:59,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 18:36:59,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 18:36:59,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 18:36:59,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:36:59" (1/1) ... [2022-07-12 18:36:59,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:36:59,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:00,021 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 18:37:00,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 18:37:00,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 18:37:00,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 18:37:00,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 18:37:00,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 18:37:00,057 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2022-07-12 18:37:00,058 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2022-07-12 18:37:00,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 18:37:00,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-12 18:37:00,058 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2022-07-12 18:37:00,058 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2022-07-12 18:37:00,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 18:37:00,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 18:37:00,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 18:37:00,151 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 18:37:00,152 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 18:37:00,497 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 18:37:00,503 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 18:37:00,504 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-07-12 18:37:00,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:37:00 BoogieIcfgContainer [2022-07-12 18:37:00,506 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 18:37:00,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 18:37:00,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 18:37:00,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 18:37:00,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:36:59" (1/3) ... [2022-07-12 18:37:00,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e5fdea6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:37:00, skipping insertion in model container [2022-07-12 18:37:00,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:36:59" (2/3) ... [2022-07-12 18:37:00,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e5fdea6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:37:00, skipping insertion in model container [2022-07-12 18:37:00,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:37:00" (3/3) ... [2022-07-12 18:37:00,518 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0235-1.i [2022-07-12 18:37:00,527 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 18:37:00,528 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 85 error locations. [2022-07-12 18:37:00,558 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 18:37:00,562 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@1a374516, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1a108ff7 [2022-07-12 18:37:00,562 INFO L358 AbstractCegarLoop]: Starting to check reachability of 85 error locations. [2022-07-12 18:37:00,566 INFO L276 IsEmpty]: Start isEmpty. Operand has 233 states, 134 states have (on average 1.873134328358209) internal successors, (251), 219 states have internal predecessors, (251), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-12 18:37:00,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-12 18:37:00,570 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:00,571 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-12 18:37:00,571 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:37:00,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:00,575 INFO L85 PathProgramCache]: Analyzing trace with hash 930118, now seen corresponding path program 1 times [2022-07-12 18:37:00,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:00,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363014116] [2022-07-12 18:37:00,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:00,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:00,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:00,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:37:00,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:00,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363014116] [2022-07-12 18:37:00,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363014116] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:37:00,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:37:00,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:37:00,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223725643] [2022-07-12 18:37:00,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:37:00,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 18:37:00,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:00,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 18:37:00,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 18:37:00,708 INFO L87 Difference]: Start difference. First operand has 233 states, 134 states have (on average 1.873134328358209) internal successors, (251), 219 states have internal predecessors, (251), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:37:00,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:00,753 INFO L93 Difference]: Finished difference Result 233 states and 262 transitions. [2022-07-12 18:37:00,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 18:37:00,755 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 [2022-07-12 18:37:00,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:00,764 INFO L225 Difference]: With dead ends: 233 [2022-07-12 18:37:00,764 INFO L226 Difference]: Without dead ends: 231 [2022-07-12 18:37:00,766 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 [2022-07-12 18:37:00,769 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:00,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:37:00,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-12 18:37:00,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-07-12 18:37:00,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 133 states have (on average 1.7894736842105263) internal successors, (238), 217 states have internal predecessors, (238), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-12 18:37:00,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 260 transitions. [2022-07-12 18:37:00,813 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 260 transitions. Word has length 4 [2022-07-12 18:37:00,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:00,813 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 260 transitions. [2022-07-12 18:37:00,813 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) [2022-07-12 18:37:00,813 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 260 transitions. [2022-07-12 18:37:00,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 18:37:00,814 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:00,814 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 18:37:00,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 18:37:00,814 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:37:00,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:00,815 INFO L85 PathProgramCache]: Analyzing trace with hash 889932981, now seen corresponding path program 1 times [2022-07-12 18:37:00,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:00,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578349860] [2022-07-12 18:37:00,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:00,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:00,829 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:00,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609737619] [2022-07-12 18:37:00,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:00,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:00,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:00,837 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:37:00,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 18:37:00,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:00,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 18:37:00,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:00,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:37:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:37:00,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:37:00,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:01,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578349860] [2022-07-12 18:37:01,000 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:01,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609737619] [2022-07-12 18:37:01,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609737619] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:37:01,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:37:01,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:37:01,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948124758] [2022-07-12 18:37:01,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:37:01,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:37:01,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:01,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:37:01,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:37:01,008 INFO L87 Difference]: Start difference. First operand 231 states and 260 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:37:01,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:01,143 INFO L93 Difference]: Finished difference Result 230 states and 259 transitions. [2022-07-12 18:37:01,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:37:01,143 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 [2022-07-12 18:37:01,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:01,145 INFO L225 Difference]: With dead ends: 230 [2022-07-12 18:37:01,145 INFO L226 Difference]: Without dead ends: 230 [2022-07-12 18:37:01,145 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 [2022-07-12 18:37:01,146 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 9 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:01,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 418 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:37:01,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-07-12 18:37:01,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2022-07-12 18:37:01,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 133 states have (on average 1.781954887218045) internal successors, (237), 216 states have internal predecessors, (237), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-12 18:37:01,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 259 transitions. [2022-07-12 18:37:01,155 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 259 transitions. Word has length 6 [2022-07-12 18:37:01,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:01,155 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 259 transitions. [2022-07-12 18:37:01,155 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) [2022-07-12 18:37:01,155 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 259 transitions. [2022-07-12 18:37:01,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-12 18:37:01,156 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:01,156 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:37:01,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:01,382 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 [2022-07-12 18:37:01,383 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:37:01,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:01,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1818119056, now seen corresponding path program 1 times [2022-07-12 18:37:01,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:01,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111143905] [2022-07-12 18:37:01,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:01,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:01,393 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:01,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [69689307] [2022-07-12 18:37:01,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:01,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:01,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:01,395 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:37:01,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 18:37:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:01,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 18:37:01,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:01,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:37:01,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:37:01,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:37:01,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:01,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111143905] [2022-07-12 18:37:01,552 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:01,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69689307] [2022-07-12 18:37:01,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69689307] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:37:01,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:37:01,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:37:01,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320177786] [2022-07-12 18:37:01,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:37:01,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:37:01,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:01,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:37:01,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:37:01,554 INFO L87 Difference]: Start difference. First operand 230 states and 259 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:37:01,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:01,560 INFO L93 Difference]: Finished difference Result 229 states and 258 transitions. [2022-07-12 18:37:01,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:37:01,560 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 [2022-07-12 18:37:01,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:01,561 INFO L225 Difference]: With dead ends: 229 [2022-07-12 18:37:01,561 INFO L226 Difference]: Without dead ends: 229 [2022-07-12 18:37:01,561 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 [2022-07-12 18:37:01,562 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 0 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:01,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 443 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 70 Unchecked, 0.0s Time] [2022-07-12 18:37:01,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-07-12 18:37:01,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-07-12 18:37:01,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 133 states have (on average 1.7744360902255638) internal successors, (236), 215 states have internal predecessors, (236), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-12 18:37:01,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 258 transitions. [2022-07-12 18:37:01,570 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 258 transitions. Word has length 7 [2022-07-12 18:37:01,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:01,570 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 258 transitions. [2022-07-12 18:37:01,571 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) [2022-07-12 18:37:01,571 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 258 transitions. [2022-07-12 18:37:01,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-12 18:37:01,573 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:01,573 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] [2022-07-12 18:37:01,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:01,790 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 [2022-07-12 18:37:01,790 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:37:01,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:01,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1115615018, now seen corresponding path program 1 times [2022-07-12 18:37:01,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:01,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324455653] [2022-07-12 18:37:01,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:01,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:01,806 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:01,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1537130037] [2022-07-12 18:37:01,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:01,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:01,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:01,808 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:37:01,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 18:37:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:01,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 18:37:01,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:02,146 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:37:02,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-12 18:37:02,157 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-12 18:37:02,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:02,347 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 18:37:02,347 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 [2022-07-12 18:37:02,360 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-12 18:37:02,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:02,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324455653] [2022-07-12 18:37:02,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:02,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537130037] [2022-07-12 18:37:02,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537130037] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:37:02,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:37:02,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2022-07-12 18:37:02,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153174954] [2022-07-12 18:37:02,362 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:02,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:37:02,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:02,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:37:02,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:37:02,363 INFO L87 Difference]: Start difference. First operand 229 states and 258 transitions. Second operand has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-12 18:37:02,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:02,777 INFO L93 Difference]: Finished difference Result 364 states and 423 transitions. [2022-07-12 18:37:02,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:37:02,777 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 [2022-07-12 18:37:02,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:02,780 INFO L225 Difference]: With dead ends: 364 [2022-07-12 18:37:02,780 INFO L226 Difference]: Without dead ends: 364 [2022-07-12 18:37:02,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-07-12 18:37:02,781 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 215 mSDsluCounter, 1736 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 1921 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 301 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:02,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 1921 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 843 Invalid, 0 Unknown, 301 Unchecked, 0.3s Time] [2022-07-12 18:37:02,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-07-12 18:37:02,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 227. [2022-07-12 18:37:02,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 133 states have (on average 1.7593984962406015) internal successors, (234), 213 states have internal predecessors, (234), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-12 18:37:02,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 256 transitions. [2022-07-12 18:37:02,818 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 256 transitions. Word has length 73 [2022-07-12 18:37:02,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:02,818 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 256 transitions. [2022-07-12 18:37:02,818 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) [2022-07-12 18:37:02,818 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 256 transitions. [2022-07-12 18:37:02,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-12 18:37:02,820 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:02,820 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] [2022-07-12 18:37:02,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:03,027 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 [2022-07-12 18:37:03,028 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:37:03,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:03,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1115615019, now seen corresponding path program 1 times [2022-07-12 18:37:03,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:03,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917151492] [2022-07-12 18:37:03,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:03,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:03,042 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:03,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [34938373] [2022-07-12 18:37:03,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:03,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:03,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:03,043 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:37:03,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 18:37:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:03,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-12 18:37:03,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:05,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:37:05,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 18:37:05,684 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:37:05,684 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 [2022-07-12 18:37:05,715 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-12 18:37:05,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:09,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:09,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917151492] [2022-07-12 18:37:09,862 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:09,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34938373] [2022-07-12 18:37:09,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34938373] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:37:09,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:37:09,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-07-12 18:37:09,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736949059] [2022-07-12 18:37:09,862 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:09,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:37:09,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:09,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:37:09,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=205, Unknown=1, NotChecked=0, Total=240 [2022-07-12 18:37:09,863 INFO L87 Difference]: Start difference. First operand 227 states and 256 transitions. Second operand has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 18:37:10,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:10,215 INFO L93 Difference]: Finished difference Result 337 states and 393 transitions. [2022-07-12 18:37:10,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:37:10,216 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 73 [2022-07-12 18:37:10,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:10,217 INFO L225 Difference]: With dead ends: 337 [2022-07-12 18:37:10,217 INFO L226 Difference]: Without dead ends: 337 [2022-07-12 18:37:10,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=64, Invalid=441, Unknown=1, NotChecked=0, Total=506 [2022-07-12 18:37:10,218 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 110 mSDsluCounter, 1352 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1550 SdHoareTripleChecker+Invalid, 2352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2111 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:10,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1550 Invalid, 2352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 230 Invalid, 0 Unknown, 2111 Unchecked, 0.2s Time] [2022-07-12 18:37:10,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-07-12 18:37:10,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 236. [2022-07-12 18:37:10,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 140 states have (on average 1.7285714285714286) internal successors, (242), 220 states have internal predecessors, (242), 12 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (19), 13 states have call predecessors, (19), 12 states have call successors, (19) [2022-07-12 18:37:10,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 273 transitions. [2022-07-12 18:37:10,227 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 273 transitions. Word has length 73 [2022-07-12 18:37:10,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:10,229 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 273 transitions. [2022-07-12 18:37:10,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 18:37:10,229 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 273 transitions. [2022-07-12 18:37:10,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-12 18:37:10,233 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:10,234 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] [2022-07-12 18:37:10,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:10,451 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 [2022-07-12 18:37:10,453 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:37:10,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:10,454 INFO L85 PathProgramCache]: Analyzing trace with hash -739950276, now seen corresponding path program 1 times [2022-07-12 18:37:10,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:10,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506959262] [2022-07-12 18:37:10,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:10,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:10,480 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:10,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877254321] [2022-07-12 18:37:10,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:10,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:10,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:10,485 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:37:10,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 18:37:10,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:10,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-12 18:37:10,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:10,626 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 [2022-07-12 18:37:10,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:37:10,981 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 [2022-07-12 18:37:10,988 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:37:10,988 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 [2022-07-12 18:37:11,014 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 73 proven. 9 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-12 18:37:11,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:13,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:13,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506959262] [2022-07-12 18:37:13,120 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:13,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877254321] [2022-07-12 18:37:13,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877254321] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:37:13,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:37:13,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-07-12 18:37:13,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609208126] [2022-07-12 18:37:13,121 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:13,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 18:37:13,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:13,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 18:37:13,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:37:13,122 INFO L87 Difference]: Start difference. First operand 236 states and 273 transitions. Second operand has 12 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 18:37:14,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:14,377 INFO L93 Difference]: Finished difference Result 336 states and 392 transitions. [2022-07-12 18:37:14,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:37:14,377 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 74 [2022-07-12 18:37:14,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:14,379 INFO L225 Difference]: With dead ends: 336 [2022-07-12 18:37:14,379 INFO L226 Difference]: Without dead ends: 336 [2022-07-12 18:37:14,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-07-12 18:37:14,379 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 111 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 1726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 550 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:14,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 697 Invalid, 1726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1165 Invalid, 0 Unknown, 550 Unchecked, 1.1s Time] [2022-07-12 18:37:14,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-07-12 18:37:14,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 226. [2022-07-12 18:37:14,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 133 states have (on average 1.7518796992481203) internal successors, (233), 212 states have internal predecessors, (233), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-12 18:37:14,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 255 transitions. [2022-07-12 18:37:14,386 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 255 transitions. Word has length 74 [2022-07-12 18:37:14,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:14,388 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 255 transitions. [2022-07-12 18:37:14,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 18:37:14,390 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 255 transitions. [2022-07-12 18:37:14,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-12 18:37:14,393 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:14,393 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] [2022-07-12 18:37:14,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:14,593 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 [2022-07-12 18:37:14,594 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:37:14,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:14,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1635791477, now seen corresponding path program 1 times [2022-07-12 18:37:14,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:14,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184527018] [2022-07-12 18:37:14,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:14,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:14,609 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:14,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315419455] [2022-07-12 18:37:14,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:14,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:14,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:14,626 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:37:14,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 18:37:14,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:14,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-12 18:37:14,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:14,878 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:37:14,880 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 [2022-07-12 18:37:14,945 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:37:14,948 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-12 18:37:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-12 18:37:14,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:15,221 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 18:37:15,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-07-12 18:37:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-12 18:37:15,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:15,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184527018] [2022-07-12 18:37:15,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:15,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315419455] [2022-07-12 18:37:15,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315419455] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:37:15,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:37:15,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2022-07-12 18:37:15,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108983299] [2022-07-12 18:37:15,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:15,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 18:37:15,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:15,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 18:37:15,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-07-12 18:37:15,232 INFO L87 Difference]: Start difference. First operand 226 states and 255 transitions. Second operand has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-12 18:37:15,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:15,676 INFO L93 Difference]: Finished difference Result 369 states and 430 transitions. [2022-07-12 18:37:15,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 18:37:15,676 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 [2022-07-12 18:37:15,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:15,678 INFO L225 Difference]: With dead ends: 369 [2022-07-12 18:37:15,678 INFO L226 Difference]: Without dead ends: 369 [2022-07-12 18:37:15,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 131 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-07-12 18:37:15,678 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 289 mSDsluCounter, 1625 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 1804 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 368 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:15,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 1804 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 912 Invalid, 0 Unknown, 368 Unchecked, 0.4s Time] [2022-07-12 18:37:15,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-07-12 18:37:15,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 232. [2022-07-12 18:37:15,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 138 states have (on average 1.7246376811594204) internal successors, (238), 216 states have internal predecessors, (238), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-12 18:37:15,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 264 transitions. [2022-07-12 18:37:15,685 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 264 transitions. Word has length 75 [2022-07-12 18:37:15,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:15,685 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 264 transitions. [2022-07-12 18:37:15,685 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) [2022-07-12 18:37:15,686 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 264 transitions. [2022-07-12 18:37:15,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-12 18:37:15,686 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:15,686 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] [2022-07-12 18:37:15,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:15,913 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 [2022-07-12 18:37:15,913 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:37:15,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:15,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1635791476, now seen corresponding path program 1 times [2022-07-12 18:37:15,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:15,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758117678] [2022-07-12 18:37:15,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:15,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:15,925 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:15,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1870115350] [2022-07-12 18:37:15,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:15,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:15,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:15,927 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:37:15,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 18:37:16,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:16,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-12 18:37:16,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:16,064 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 [2022-07-12 18:37:16,504 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:37:16,505 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 [2022-07-12 18:37:16,509 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 [2022-07-12 18:37:16,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:37:16,629 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 [2022-07-12 18:37:16,644 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-12 18:37:16,644 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 [2022-07-12 18:37:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-12 18:37:16,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:20,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:20,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758117678] [2022-07-12 18:37:20,835 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:20,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870115350] [2022-07-12 18:37:20,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870115350] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:37:20,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:37:20,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-07-12 18:37:20,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518408737] [2022-07-12 18:37:20,835 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:20,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 18:37:20,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:20,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 18:37:20,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-07-12 18:37:20,836 INFO L87 Difference]: Start difference. First operand 232 states and 264 transitions. Second operand has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 18:37:22,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:22,024 INFO L93 Difference]: Finished difference Result 333 states and 383 transitions. [2022-07-12 18:37:22,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:37:22,024 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 [2022-07-12 18:37:22,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:22,025 INFO L225 Difference]: With dead ends: 333 [2022-07-12 18:37:22,025 INFO L226 Difference]: Without dead ends: 333 [2022-07-12 18:37:22,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-07-12 18:37:22,026 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 113 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 2479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1318 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:22,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 1257 Invalid, 2479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1149 Invalid, 0 Unknown, 1318 Unchecked, 0.9s Time] [2022-07-12 18:37:22,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-07-12 18:37:22,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 232. [2022-07-12 18:37:22,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 138 states have (on average 1.7173913043478262) internal successors, (237), 216 states have internal predecessors, (237), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-12 18:37:22,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 263 transitions. [2022-07-12 18:37:22,031 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 263 transitions. Word has length 75 [2022-07-12 18:37:22,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:22,031 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 263 transitions. [2022-07-12 18:37:22,031 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) [2022-07-12 18:37:22,031 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 263 transitions. [2022-07-12 18:37:22,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-12 18:37:22,032 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:22,032 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] [2022-07-12 18:37:22,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-12 18:37:22,232 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 [2022-07-12 18:37:22,233 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:37:22,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:22,233 INFO L85 PathProgramCache]: Analyzing trace with hash 830071777, now seen corresponding path program 1 times [2022-07-12 18:37:22,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:22,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680060839] [2022-07-12 18:37:22,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:22,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:22,246 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:22,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1276423009] [2022-07-12 18:37:22,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:22,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:22,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:22,248 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:37:22,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 18:37:22,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:22,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 18:37:22,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:22,420 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-12 18:37:22,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:22,441 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 [2022-07-12 18:37:22,489 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-12 18:37:22,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:22,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680060839] [2022-07-12 18:37:22,489 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:22,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276423009] [2022-07-12 18:37:22,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276423009] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:37:22,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:37:22,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-12 18:37:22,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299878746] [2022-07-12 18:37:22,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:22,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:37:22,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:22,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:37:22,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:37:22,490 INFO L87 Difference]: Start difference. First operand 232 states and 263 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 18:37:22,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:22,671 INFO L93 Difference]: Finished difference Result 250 states and 288 transitions. [2022-07-12 18:37:22,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:37:22,672 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 [2022-07-12 18:37:22,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:22,673 INFO L225 Difference]: With dead ends: 250 [2022-07-12 18:37:22,673 INFO L226 Difference]: Without dead ends: 250 [2022-07-12 18:37:22,673 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 [2022-07-12 18:37:22,674 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 305 mSDsluCounter, 1268 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 1495 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:22,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 1495 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:37:22,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-07-12 18:37:22,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 231. [2022-07-12 18:37:22,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 138 states have (on average 1.710144927536232) internal successors, (236), 215 states have internal predecessors, (236), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-12 18:37:22,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 262 transitions. [2022-07-12 18:37:22,680 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 262 transitions. Word has length 76 [2022-07-12 18:37:22,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:22,681 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 262 transitions. [2022-07-12 18:37:22,681 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) [2022-07-12 18:37:22,681 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 262 transitions. [2022-07-12 18:37:22,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-12 18:37:22,683 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:22,683 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] [2022-07-12 18:37:22,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:22,895 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 [2022-07-12 18:37:22,895 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:37:22,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:22,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1164939870, now seen corresponding path program 1 times [2022-07-12 18:37:22,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:22,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792571894] [2022-07-12 18:37:22,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:22,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:22,908 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:22,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476680715] [2022-07-12 18:37:22,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:22,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:22,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:22,910 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:37:22,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 18:37:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:23,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 18:37:23,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-12 18:37:23,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:37:23,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:23,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792571894] [2022-07-12 18:37:23,076 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:23,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476680715] [2022-07-12 18:37:23,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476680715] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:37:23,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:37:23,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:37:23,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530123582] [2022-07-12 18:37:23,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:37:23,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:37:23,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:23,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:37:23,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:37:23,078 INFO L87 Difference]: Start difference. First operand 231 states and 262 transitions. Second operand has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-12 18:37:23,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:23,211 INFO L93 Difference]: Finished difference Result 238 states and 273 transitions. [2022-07-12 18:37:23,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:37:23,212 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 [2022-07-12 18:37:23,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:23,213 INFO L225 Difference]: With dead ends: 238 [2022-07-12 18:37:23,213 INFO L226 Difference]: Without dead ends: 238 [2022-07-12 18:37:23,214 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 [2022-07-12 18:37:23,214 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 90 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:23,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 353 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:37:23,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-07-12 18:37:23,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 230. [2022-07-12 18:37:23,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 138 states have (on average 1.7028985507246377) internal successors, (235), 214 states have internal predecessors, (235), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-12 18:37:23,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 261 transitions. [2022-07-12 18:37:23,222 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 261 transitions. Word has length 78 [2022-07-12 18:37:23,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:23,222 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 261 transitions. [2022-07-12 18:37:23,222 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) [2022-07-12 18:37:23,222 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 261 transitions. [2022-07-12 18:37:23,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-12 18:37:23,223 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:23,223 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] [2022-07-12 18:37:23,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:23,433 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 [2022-07-12 18:37:23,433 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:37:23,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:23,434 INFO L85 PathProgramCache]: Analyzing trace with hash -76043767, now seen corresponding path program 1 times [2022-07-12 18:37:23,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:23,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300028459] [2022-07-12 18:37:23,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:23,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:23,446 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:23,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [320864029] [2022-07-12 18:37:23,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:23,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:23,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:23,448 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:37:23,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 18:37:23,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:23,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-12 18:37:23,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:23,692 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:37:23,692 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 [2022-07-12 18:37:23,742 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:37:23,742 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 [2022-07-12 18:37:23,810 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:37:23,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-12 18:37:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 73 proven. 40 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-12 18:37:23,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:23,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:23,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300028459] [2022-07-12 18:37:23,992 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:23,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320864029] [2022-07-12 18:37:23,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320864029] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:37:23,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:37:23,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-07-12 18:37:23,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48224029] [2022-07-12 18:37:23,992 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:23,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:37:23,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:23,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:37:23,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:37:23,993 INFO L87 Difference]: Start difference. First operand 230 states and 261 transitions. Second operand has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 18:37:24,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:24,675 INFO L93 Difference]: Finished difference Result 399 states and 465 transitions. [2022-07-12 18:37:24,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 18:37:24,676 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 [2022-07-12 18:37:24,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:24,678 INFO L225 Difference]: With dead ends: 399 [2022-07-12 18:37:24,678 INFO L226 Difference]: Without dead ends: 399 [2022-07-12 18:37:24,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-07-12 18:37:24,679 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 263 mSDsluCounter, 1874 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 2065 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 480 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:24,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 2065 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 964 Invalid, 0 Unknown, 480 Unchecked, 0.6s Time] [2022-07-12 18:37:24,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-07-12 18:37:24,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 262. [2022-07-12 18:37:24,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 165 states have (on average 1.612121212121212) internal successors, (266), 240 states have internal predecessors, (266), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-12 18:37:24,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 302 transitions. [2022-07-12 18:37:24,691 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 302 transitions. Word has length 82 [2022-07-12 18:37:24,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:24,691 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 302 transitions. [2022-07-12 18:37:24,691 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) [2022-07-12 18:37:24,691 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 302 transitions. [2022-07-12 18:37:24,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-12 18:37:24,692 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:24,692 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] [2022-07-12 18:37:24,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:24,910 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 [2022-07-12 18:37:24,910 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:37:24,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:24,911 INFO L85 PathProgramCache]: Analyzing trace with hash -76043766, now seen corresponding path program 1 times [2022-07-12 18:37:24,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:24,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894170147] [2022-07-12 18:37:24,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:24,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:24,924 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:24,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037793458] [2022-07-12 18:37:24,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:24,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:24,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:24,925 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:37:24,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 18:37:25,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:25,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-12 18:37:25,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:25,150 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 [2022-07-12 18:37:25,792 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:37:25,793 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 [2022-07-12 18:37:25,798 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 [2022-07-12 18:37:26,138 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:37:26,139 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 [2022-07-12 18:37:26,143 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 [2022-07-12 18:37:26,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:37:26,292 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 [2022-07-12 18:37:26,308 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-12 18:37:26,308 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 [2022-07-12 18:37:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 73 proven. 48 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-12 18:37:26,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:28,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:28,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894170147] [2022-07-12 18:37:28,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:28,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037793458] [2022-07-12 18:37:28,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037793458] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:37:28,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:37:28,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-07-12 18:37:28,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281864456] [2022-07-12 18:37:28,583 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:28,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 18:37:28,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:28,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 18:37:28,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-07-12 18:37:28,583 INFO L87 Difference]: Start difference. First operand 262 states and 302 transitions. Second operand has 22 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 18:37:30,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:30,162 INFO L93 Difference]: Finished difference Result 371 states and 431 transitions. [2022-07-12 18:37:30,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 18:37:30,163 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 82 [2022-07-12 18:37:30,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:30,165 INFO L225 Difference]: With dead ends: 371 [2022-07-12 18:37:30,165 INFO L226 Difference]: Without dead ends: 371 [2022-07-12 18:37:30,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-07-12 18:37:30,165 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 116 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 1124 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1442 SdHoareTripleChecker+Invalid, 3920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2784 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:30,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 1442 Invalid, 3920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1124 Invalid, 0 Unknown, 2784 Unchecked, 1.1s Time] [2022-07-12 18:37:30,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-07-12 18:37:30,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 269. [2022-07-12 18:37:30,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 172 states have (on average 1.5930232558139534) internal successors, (274), 247 states have internal predecessors, (274), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-12 18:37:30,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 310 transitions. [2022-07-12 18:37:30,171 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 310 transitions. Word has length 82 [2022-07-12 18:37:30,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:30,171 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 310 transitions. [2022-07-12 18:37:30,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 18:37:30,171 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 310 transitions. [2022-07-12 18:37:30,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-12 18:37:30,172 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:30,172 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] [2022-07-12 18:37:30,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:30,372 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 [2022-07-12 18:37:30,373 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:37:30,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:30,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1937610552, now seen corresponding path program 1 times [2022-07-12 18:37:30,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:30,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428296188] [2022-07-12 18:37:30,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:30,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:30,383 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:30,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970547908] [2022-07-12 18:37:30,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:30,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:30,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:30,388 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) [2022-07-12 18:37:30,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 18:37:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:30,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 18:37:30,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:30,555 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-12 18:37:30,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:37:30,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:30,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428296188] [2022-07-12 18:37:30,556 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:30,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970547908] [2022-07-12 18:37:30,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970547908] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:37:30,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:37:30,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:37:30,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730808936] [2022-07-12 18:37:30,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:37:30,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:37:30,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:30,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:37:30,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:37:30,557 INFO L87 Difference]: Start difference. First operand 269 states and 310 transitions. Second operand has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 18:37:30,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:30,694 INFO L93 Difference]: Finished difference Result 282 states and 328 transitions. [2022-07-12 18:37:30,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:37:30,695 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 [2022-07-12 18:37:30,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:30,696 INFO L225 Difference]: With dead ends: 282 [2022-07-12 18:37:30,697 INFO L226 Difference]: Without dead ends: 282 [2022-07-12 18:37:30,697 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 [2022-07-12 18:37:30,697 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 157 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:30,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 517 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:37:30,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-07-12 18:37:30,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 268. [2022-07-12 18:37:30,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 172 states have (on average 1.5872093023255813) internal successors, (273), 246 states have internal predecessors, (273), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-12 18:37:30,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 309 transitions. [2022-07-12 18:37:30,704 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 309 transitions. Word has length 83 [2022-07-12 18:37:30,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:30,706 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 309 transitions. [2022-07-12 18:37:30,706 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) [2022-07-12 18:37:30,706 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 309 transitions. [2022-07-12 18:37:30,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-12 18:37:30,707 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:30,707 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] [2022-07-12 18:37:30,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-12 18:37:30,910 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 [2022-07-12 18:37:30,910 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:37:30,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:30,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1937610553, now seen corresponding path program 1 times [2022-07-12 18:37:30,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:30,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535759207] [2022-07-12 18:37:30,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:30,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:30,930 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:30,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [640287012] [2022-07-12 18:37:30,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:30,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:30,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:30,932 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) [2022-07-12 18:37:30,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 18:37:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:31,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-12 18:37:31,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:31,103 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 [2022-07-12 18:37:31,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:37:32,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:37:32,015 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 [2022-07-12 18:37:32,029 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:37:32,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-12 18:37:32,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:37:32,353 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 [2022-07-12 18:37:32,367 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-12 18:37:32,367 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 [2022-07-12 18:37:33,327 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-12 18:37:33,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:33,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:33,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535759207] [2022-07-12 18:37:33,618 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:33,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640287012] [2022-07-12 18:37:33,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640287012] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:37:33,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:37:33,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-07-12 18:37:33,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659709339] [2022-07-12 18:37:33,619 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:33,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 18:37:33,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:33,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 18:37:33,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-07-12 18:37:33,620 INFO L87 Difference]: Start difference. First operand 268 states and 309 transitions. Second operand has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 18:37:34,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:34,325 INFO L93 Difference]: Finished difference Result 415 states and 499 transitions. [2022-07-12 18:37:34,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 18:37:34,325 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 [2022-07-12 18:37:34,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:34,326 INFO L225 Difference]: With dead ends: 415 [2022-07-12 18:37:34,326 INFO L226 Difference]: Without dead ends: 415 [2022-07-12 18:37:34,327 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 [2022-07-12 18:37:34,327 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 114 mSDsluCounter, 1589 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1780 SdHoareTripleChecker+Invalid, 2810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2581 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:34,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1780 Invalid, 2810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 218 Invalid, 0 Unknown, 2581 Unchecked, 0.2s Time] [2022-07-12 18:37:34,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-07-12 18:37:34,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 311. [2022-07-12 18:37:34,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 209 states have (on average 1.5119617224880382) internal successors, (316), 283 states have internal predecessors, (316), 22 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (39), 24 states have call predecessors, (39), 22 states have call successors, (39) [2022-07-12 18:37:34,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 377 transitions. [2022-07-12 18:37:34,334 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 377 transitions. Word has length 83 [2022-07-12 18:37:34,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:34,334 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 377 transitions. [2022-07-12 18:37:34,334 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) [2022-07-12 18:37:34,334 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 377 transitions. [2022-07-12 18:37:34,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-12 18:37:34,334 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:34,335 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] [2022-07-12 18:37:34,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:34,541 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 [2022-07-12 18:37:34,541 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:37:34,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:34,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1702611176, now seen corresponding path program 1 times [2022-07-12 18:37:34,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:34,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177112291] [2022-07-12 18:37:34,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:34,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:34,553 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:34,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790452514] [2022-07-12 18:37:34,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:34,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:34,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:34,555 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) [2022-07-12 18:37:34,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 18:37:34,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:34,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-12 18:37:34,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:34,743 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 [2022-07-12 18:37:34,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:37:35,568 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:37:35,568 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 [2022-07-12 18:37:35,581 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 [2022-07-12 18:37:36,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:37:36,066 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 [2022-07-12 18:37:36,083 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-12 18:37:36,084 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 [2022-07-12 18:37:36,895 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 83 proven. 27 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-12 18:37:36,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:37,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:37,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177112291] [2022-07-12 18:37:37,152 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:37,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790452514] [2022-07-12 18:37:37,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790452514] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:37:37,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:37:37,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-07-12 18:37:37,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124796449] [2022-07-12 18:37:37,152 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:37,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 18:37:37,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:37,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 18:37:37,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-07-12 18:37:37,169 INFO L87 Difference]: Start difference. First operand 311 states and 377 transitions. Second operand has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 18:37:37,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:37,509 INFO L93 Difference]: Finished difference Result 517 states and 654 transitions. [2022-07-12 18:37:37,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 18:37:37,509 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 84 [2022-07-12 18:37:37,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:37,511 INFO L225 Difference]: With dead ends: 517 [2022-07-12 18:37:37,511 INFO L226 Difference]: Without dead ends: 517 [2022-07-12 18:37:37,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-07-12 18:37:37,512 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 170 mSDsluCounter, 2751 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 3012 SdHoareTripleChecker+Invalid, 5428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5192 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:37,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 3012 Invalid, 5428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 225 Invalid, 0 Unknown, 5192 Unchecked, 0.1s Time] [2022-07-12 18:37:37,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-07-12 18:37:37,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 318. [2022-07-12 18:37:37,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 215 states have (on average 1.5069767441860464) internal successors, (324), 290 states have internal predecessors, (324), 22 states have call successors, (22), 3 states have call predecessors, (22), 6 states have return successors, (55), 24 states have call predecessors, (55), 22 states have call successors, (55) [2022-07-12 18:37:37,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 401 transitions. [2022-07-12 18:37:37,534 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 401 transitions. Word has length 84 [2022-07-12 18:37:37,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:37,535 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 401 transitions. [2022-07-12 18:37:37,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 18:37:37,535 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 401 transitions. [2022-07-12 18:37:37,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-12 18:37:37,536 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:37,536 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] [2022-07-12 18:37:37,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:37,736 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 [2022-07-12 18:37:37,736 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:37:37,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:37,737 INFO L85 PathProgramCache]: Analyzing trace with hash 567625738, now seen corresponding path program 2 times [2022-07-12 18:37:37,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:37,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323293056] [2022-07-12 18:37:37,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:37,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:37,751 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:37,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [213961381] [2022-07-12 18:37:37,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:37:37,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:37,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:37,769 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) [2022-07-12 18:37:37,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 18:37:37,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:37:37,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:37:37,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-12 18:37:37,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:37,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:37:37,967 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 [2022-07-12 18:37:38,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:37:38,973 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 [2022-07-12 18:37:38,990 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:37:38,991 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 [2022-07-12 18:37:39,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:37:39,330 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 [2022-07-12 18:37:39,338 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:37:39,338 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 [2022-07-12 18:37:40,388 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 83 proven. 27 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-12 18:37:40,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:40,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:40,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323293056] [2022-07-12 18:37:40,627 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:40,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213961381] [2022-07-12 18:37:40,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213961381] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:37:40,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:37:40,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-07-12 18:37:40,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652051286] [2022-07-12 18:37:40,627 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:40,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 18:37:40,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:40,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 18:37:40,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2022-07-12 18:37:40,628 INFO L87 Difference]: Start difference. First operand 318 states and 401 transitions. Second operand has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 18:37:41,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:41,202 INFO L93 Difference]: Finished difference Result 483 states and 610 transitions. [2022-07-12 18:37:41,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 18:37:41,202 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 84 [2022-07-12 18:37:41,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:41,204 INFO L225 Difference]: With dead ends: 483 [2022-07-12 18:37:41,204 INFO L226 Difference]: Without dead ends: 483 [2022-07-12 18:37:41,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-07-12 18:37:41,205 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 114 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 2086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1856 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:41,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 923 Invalid, 2086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 219 Invalid, 0 Unknown, 1856 Unchecked, 0.2s Time] [2022-07-12 18:37:41,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-07-12 18:37:41,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 333. [2022-07-12 18:37:41,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 225 states have (on average 1.4844444444444445) internal successors, (334), 301 states have internal predecessors, (334), 26 states have call successors, (26), 3 states have call predecessors, (26), 7 states have return successors, (68), 28 states have call predecessors, (68), 26 states have call successors, (68) [2022-07-12 18:37:41,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 428 transitions. [2022-07-12 18:37:41,217 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 428 transitions. Word has length 84 [2022-07-12 18:37:41,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:41,218 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 428 transitions. [2022-07-12 18:37:41,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 18:37:41,218 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 428 transitions. [2022-07-12 18:37:41,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-12 18:37:41,219 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:41,219 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] [2022-07-12 18:37:41,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:41,436 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 [2022-07-12 18:37:41,437 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:37:41,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:41,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1414632217, now seen corresponding path program 3 times [2022-07-12 18:37:41,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:41,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426096230] [2022-07-12 18:37:41,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:41,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:41,453 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:41,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332630158] [2022-07-12 18:37:41,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:37:41,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:41,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:41,455 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) [2022-07-12 18:37:41,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 18:37:41,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 18:37:41,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:37:41,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 18:37:41,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:41,636 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-07-12 18:37:41,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:37:41,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:41,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426096230] [2022-07-12 18:37:41,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:41,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332630158] [2022-07-12 18:37:41,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332630158] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:37:41,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:37:41,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:37:41,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26390821] [2022-07-12 18:37:41,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:37:41,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:37:41,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:41,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:37:41,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:37:41,639 INFO L87 Difference]: Start difference. First operand 333 states and 428 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-12 18:37:41,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:41,675 INFO L93 Difference]: Finished difference Result 298 states and 356 transitions. [2022-07-12 18:37:41,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:37:41,687 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 [2022-07-12 18:37:41,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:41,688 INFO L225 Difference]: With dead ends: 298 [2022-07-12 18:37:41,688 INFO L226 Difference]: Without dead ends: 288 [2022-07-12 18:37:41,689 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 [2022-07-12 18:37:41,689 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 17 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:41,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 709 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:37:41,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-07-12 18:37:41,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 270. [2022-07-12 18:37:41,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 174 states have (on average 1.5804597701149425) internal successors, (275), 248 states have internal predecessors, (275), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-12 18:37:41,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 311 transitions. [2022-07-12 18:37:41,696 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 311 transitions. Word has length 85 [2022-07-12 18:37:41,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:41,697 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 311 transitions. [2022-07-12 18:37:41,697 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) [2022-07-12 18:37:41,697 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 311 transitions. [2022-07-12 18:37:41,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-12 18:37:41,697 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:41,697 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] [2022-07-12 18:37:41,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:41,914 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 [2022-07-12 18:37:41,914 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:37:41,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:41,915 INFO L85 PathProgramCache]: Analyzing trace with hash -560943855, now seen corresponding path program 4 times [2022-07-12 18:37:41,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:41,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334450903] [2022-07-12 18:37:41,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:41,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:41,941 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:41,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2050032193] [2022-07-12 18:37:41,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:37:41,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:41,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:41,969 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) [2022-07-12 18:37:41,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 18:37:42,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:37:42,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:37:42,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-12 18:37:42,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:42,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:37:42,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:37:42,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:37:42,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-07-12 18:37:42,756 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:37:42,757 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 [2022-07-12 18:37:42,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:37:42,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-07-12 18:37:42,885 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:37:42,885 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 [2022-07-12 18:37:43,389 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 100 proven. 49 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-12 18:37:43,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:43,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:43,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334450903] [2022-07-12 18:37:43,619 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:43,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050032193] [2022-07-12 18:37:43,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050032193] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:37:43,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:37:43,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-07-12 18:37:43,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127780260] [2022-07-12 18:37:43,619 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:43,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 18:37:43,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:43,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 18:37:43,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2022-07-12 18:37:43,621 INFO L87 Difference]: Start difference. First operand 270 states and 311 transitions. Second operand has 18 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 18:37:44,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:44,029 INFO L93 Difference]: Finished difference Result 417 states and 501 transitions. [2022-07-12 18:37:44,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 18:37:44,030 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 [2022-07-12 18:37:44,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:44,031 INFO L225 Difference]: With dead ends: 417 [2022-07-12 18:37:44,031 INFO L226 Difference]: Without dead ends: 417 [2022-07-12 18:37:44,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2022-07-12 18:37:44,032 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 114 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 2323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2089 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:44,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1022 Invalid, 2323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 223 Invalid, 0 Unknown, 2089 Unchecked, 0.2s Time] [2022-07-12 18:37:44,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-07-12 18:37:44,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 313. [2022-07-12 18:37:44,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 211 states have (on average 1.5071090047393365) internal successors, (318), 285 states have internal predecessors, (318), 22 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (39), 24 states have call predecessors, (39), 22 states have call successors, (39) [2022-07-12 18:37:44,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 379 transitions. [2022-07-12 18:37:44,037 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 379 transitions. Word has length 89 [2022-07-12 18:37:44,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:44,038 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 379 transitions. [2022-07-12 18:37:44,038 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) [2022-07-12 18:37:44,038 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 379 transitions. [2022-07-12 18:37:44,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-12 18:37:44,038 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:44,038 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] [2022-07-12 18:37:44,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:44,239 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 [2022-07-12 18:37:44,239 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:37:44,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:44,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1182337176, now seen corresponding path program 5 times [2022-07-12 18:37:44,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:44,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267805456] [2022-07-12 18:37:44,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:44,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:44,252 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:44,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [140754542] [2022-07-12 18:37:44,252 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:37:44,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:44,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:44,254 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) [2022-07-12 18:37:44,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 18:37:44,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:37:44,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:37:44,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 18:37:44,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 111 proven. 1 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-12 18:37:44,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 11 proven. 47 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-07-12 18:37:44,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:44,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267805456] [2022-07-12 18:37:44,702 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:44,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140754542] [2022-07-12 18:37:44,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140754542] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:37:44,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:37:44,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-12 18:37:44,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034547245] [2022-07-12 18:37:44,702 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:44,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:37:44,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:44,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:37:44,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:37:44,703 INFO L87 Difference]: Start difference. First operand 313 states and 379 transitions. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-07-12 18:37:44,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:44,900 INFO L93 Difference]: Finished difference Result 302 states and 347 transitions. [2022-07-12 18:37:44,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:37:44,900 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 [2022-07-12 18:37:44,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:44,901 INFO L225 Difference]: With dead ends: 302 [2022-07-12 18:37:44,901 INFO L226 Difference]: Without dead ends: 287 [2022-07-12 18:37:44,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:37:44,902 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 60 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:44,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 1180 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:37:44,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-07-12 18:37:44,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2022-07-12 18:37:44,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 190 states have (on average 1.5473684210526315) internal successors, (294), 264 states have internal predecessors, (294), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-12 18:37:44,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 330 transitions. [2022-07-12 18:37:44,908 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 330 transitions. Word has length 90 [2022-07-12 18:37:44,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:44,908 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 330 transitions. [2022-07-12 18:37:44,908 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) [2022-07-12 18:37:44,908 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 330 transitions. [2022-07-12 18:37:44,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-12 18:37:44,909 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:44,909 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] [2022-07-12 18:37:44,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:45,125 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 [2022-07-12 18:37:45,126 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:37:45,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:45,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1234441241, now seen corresponding path program 6 times [2022-07-12 18:37:45,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:45,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843285510] [2022-07-12 18:37:45,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:45,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:45,142 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:45,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [145589110] [2022-07-12 18:37:45,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:37:45,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:45,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:45,144 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) [2022-07-12 18:37:45,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 18:37:47,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-12 18:37:47,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:37:47,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 18:37:47,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:47,154 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 110 proven. 3 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-07-12 18:37:47,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:47,339 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 110 proven. 3 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-07-12 18:37:47,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:47,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843285510] [2022-07-12 18:37:47,340 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:47,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145589110] [2022-07-12 18:37:47,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145589110] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:37:47,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:37:47,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-07-12 18:37:47,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813109938] [2022-07-12 18:37:47,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:47,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 18:37:47,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:47,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 18:37:47,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:37:47,341 INFO L87 Difference]: Start difference. First operand 287 states and 330 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-12 18:37:47,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:47,528 INFO L93 Difference]: Finished difference Result 301 states and 346 transitions. [2022-07-12 18:37:47,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 18:37:47,529 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 [2022-07-12 18:37:47,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:47,530 INFO L225 Difference]: With dead ends: 301 [2022-07-12 18:37:47,530 INFO L226 Difference]: Without dead ends: 291 [2022-07-12 18:37:47,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2022-07-12 18:37:47,530 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 72 mSDsluCounter, 1409 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:47,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1649 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:37:47,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-07-12 18:37:47,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2022-07-12 18:37:47,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 194 states have (on average 1.5257731958762886) internal successors, (296), 268 states have internal predecessors, (296), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-12 18:37:47,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 332 transitions. [2022-07-12 18:37:47,535 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 332 transitions. Word has length 105 [2022-07-12 18:37:47,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:47,535 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 332 transitions. [2022-07-12 18:37:47,535 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) [2022-07-12 18:37:47,536 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 332 transitions. [2022-07-12 18:37:47,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-12 18:37:47,536 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:47,536 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] [2022-07-12 18:37:47,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:47,737 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 [2022-07-12 18:37:47,737 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:37:47,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:47,737 INFO L85 PathProgramCache]: Analyzing trace with hash 927290713, now seen corresponding path program 7 times [2022-07-12 18:37:47,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:47,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673103034] [2022-07-12 18:37:47,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:47,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:47,770 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:47,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961167612] [2022-07-12 18:37:47,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:37:47,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:47,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:47,788 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) [2022-07-12 18:37:47,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-12 18:37:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:49,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-12 18:37:49,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:49,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:37:49,348 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:37:49,348 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 [2022-07-12 18:37:49,355 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 [2022-07-12 18:37:49,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:37:49,507 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 [2022-07-12 18:37:49,537 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-12 18:37:49,537 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 [2022-07-12 18:37:49,595 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 326 proven. 116 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-07-12 18:37:49,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:50,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:50,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673103034] [2022-07-12 18:37:50,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:50,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961167612] [2022-07-12 18:37:50,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961167612] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:37:50,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:37:50,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-07-12 18:37:50,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283791549] [2022-07-12 18:37:50,253 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:50,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 18:37:50,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:50,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 18:37:50,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-07-12 18:37:50,254 INFO L87 Difference]: Start difference. First operand 291 states and 332 transitions. Second operand has 19 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 18:37:51,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:51,475 INFO L93 Difference]: Finished difference Result 516 states and 602 transitions. [2022-07-12 18:37:51,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:37:51,476 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 [2022-07-12 18:37:51,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:51,477 INFO L225 Difference]: With dead ends: 516 [2022-07-12 18:37:51,477 INFO L226 Difference]: Without dead ends: 516 [2022-07-12 18:37:51,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-07-12 18:37:51,478 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 292 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 1829 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 2583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 713 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:51,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 793 Invalid, 2583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1829 Invalid, 0 Unknown, 713 Unchecked, 1.1s Time] [2022-07-12 18:37:51,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-07-12 18:37:51,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 299. [2022-07-12 18:37:51,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 202 states have (on average 1.5198019801980198) internal successors, (307), 276 states have internal predecessors, (307), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-12 18:37:51,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 343 transitions. [2022-07-12 18:37:51,484 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 343 transitions. Word has length 109 [2022-07-12 18:37:51,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:51,484 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 343 transitions. [2022-07-12 18:37:51,485 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) [2022-07-12 18:37:51,485 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 343 transitions. [2022-07-12 18:37:51,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-12 18:37:51,485 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:51,485 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] [2022-07-12 18:37:51,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:51,706 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 [2022-07-12 18:37:51,707 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:37:51,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:51,707 INFO L85 PathProgramCache]: Analyzing trace with hash 2068145114, now seen corresponding path program 1 times [2022-07-12 18:37:51,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:51,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685819172] [2022-07-12 18:37:51,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:51,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:51,726 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:51,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [190020288] [2022-07-12 18:37:51,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:51,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:51,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:51,729 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) [2022-07-12 18:37:51,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-12 18:37:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:51,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 18:37:51,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:51,992 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-12 18:37:51,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:37:51,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:51,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685819172] [2022-07-12 18:37:51,992 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:51,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190020288] [2022-07-12 18:37:51,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190020288] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:37:51,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:37:51,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:37:51,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445578103] [2022-07-12 18:37:51,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:37:51,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:37:51,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:51,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:37:51,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:37:51,994 INFO L87 Difference]: Start difference. First operand 299 states and 343 transitions. Second operand has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-12 18:37:52,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:52,101 INFO L93 Difference]: Finished difference Result 304 states and 351 transitions. [2022-07-12 18:37:52,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:37:52,102 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 [2022-07-12 18:37:52,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:52,104 INFO L225 Difference]: With dead ends: 304 [2022-07-12 18:37:52,104 INFO L226 Difference]: Without dead ends: 304 [2022-07-12 18:37:52,104 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 [2022-07-12 18:37:52,105 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 76 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:52,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 358 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:37:52,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-07-12 18:37:52,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 298. [2022-07-12 18:37:52,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 202 states have (on average 1.5148514851485149) internal successors, (306), 275 states have internal predecessors, (306), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-12 18:37:52,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 342 transitions. [2022-07-12 18:37:52,109 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 342 transitions. Word has length 111 [2022-07-12 18:37:52,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:52,109 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 342 transitions. [2022-07-12 18:37:52,109 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) [2022-07-12 18:37:52,109 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 342 transitions. [2022-07-12 18:37:52,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-12 18:37:52,110 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:52,110 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] [2022-07-12 18:37:52,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:52,310 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 [2022-07-12 18:37:52,311 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:37:52,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:52,311 INFO L85 PathProgramCache]: Analyzing trace with hash -807331391, now seen corresponding path program 1 times [2022-07-12 18:37:52,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:52,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960689823] [2022-07-12 18:37:52,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:52,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:52,334 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:52,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1915953845] [2022-07-12 18:37:52,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:52,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:52,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:52,352 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) [2022-07-12 18:37:52,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-12 18:37:52,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:37:52,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-12 18:37:52,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:37:52,807 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:37:52,807 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 [2022-07-12 18:37:52,879 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:37:52,879 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 [2022-07-12 18:37:52,998 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:37:52,999 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 [2022-07-12 18:37:53,123 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:37:53,123 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 [2022-07-12 18:37:53,183 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 328 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-07-12 18:37:53,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:37:53,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:37:53,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960689823] [2022-07-12 18:37:53,714 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:37:53,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915953845] [2022-07-12 18:37:53,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915953845] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:37:53,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:37:53,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-07-12 18:37:53,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990217488] [2022-07-12 18:37:53,714 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:37:53,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 18:37:53,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:37:53,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 18:37:53,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-07-12 18:37:53,715 INFO L87 Difference]: Start difference. First operand 298 states and 342 transitions. Second operand has 21 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 17 states have internal predecessors, (74), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 18:37:58,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:37:58,308 INFO L93 Difference]: Finished difference Result 421 states and 488 transitions. [2022-07-12 18:37:58,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 18:37:58,309 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 [2022-07-12 18:37:58,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:37:58,310 INFO L225 Difference]: With dead ends: 421 [2022-07-12 18:37:58,310 INFO L226 Difference]: Without dead ends: 421 [2022-07-12 18:37:58,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 134 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2022-07-12 18:37:58,311 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 206 mSDsluCounter, 2438 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 2657 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 661 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:37:58,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 2657 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 814 Invalid, 0 Unknown, 661 Unchecked, 0.3s Time] [2022-07-12 18:37:58,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-07-12 18:37:58,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 411. [2022-07-12 18:37:58,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 302 states have (on average 1.403973509933775) internal successors, (424), 374 states have internal predecessors, (424), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-12 18:37:58,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 482 transitions. [2022-07-12 18:37:58,317 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 482 transitions. Word has length 115 [2022-07-12 18:37:58,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:37:58,318 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 482 transitions. [2022-07-12 18:37:58,318 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) [2022-07-12 18:37:58,318 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 482 transitions. [2022-07-12 18:37:58,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-12 18:37:58,318 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:37:58,318 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] [2022-07-12 18:37:58,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-12 18:37:58,519 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 [2022-07-12 18:37:58,519 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:37:58,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:37:58,519 INFO L85 PathProgramCache]: Analyzing trace with hash -807331390, now seen corresponding path program 1 times [2022-07-12 18:37:58,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:37:58,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867752160] [2022-07-12 18:37:58,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:58,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:37:58,557 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:37:58,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [176257860] [2022-07-12 18:37:58,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:37:58,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:37:58,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:37:58,559 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) [2022-07-12 18:37:58,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-12 18:38:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:38:02,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 140 conjunts are in the unsatisfiable core [2022-07-12 18:38:02,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:02,393 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 0 case distinctions, treesize of input 12 treesize of output 9 [2022-07-12 18:38:02,400 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 [2022-07-12 18:38:03,200 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:38:03,201 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 [2022-07-12 18:38:03,235 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:38:03,235 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 [2022-07-12 18:38:03,715 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:38:03,715 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 [2022-07-12 18:38:03,767 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:38:03,767 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 [2022-07-12 18:38:04,131 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:38:04,132 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 [2022-07-12 18:38:04,179 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-12 18:38:04,179 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 [2022-07-12 18:38:04,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:38:04,486 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 [2022-07-12 18:38:04,514 INFO L356 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-07-12 18:38:04,515 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 [2022-07-12 18:38:04,727 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 215 proven. 295 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-07-12 18:38:04,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:38:04,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:04,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867752160] [2022-07-12 18:38:04,933 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:04,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176257860] [2022-07-12 18:38:04,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176257860] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:38:04,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:38:04,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-07-12 18:38:04,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826718328] [2022-07-12 18:38:04,934 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:38:04,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-12 18:38:04,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:04,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-12 18:38:04,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2022-07-12 18:38:04,935 INFO L87 Difference]: Start difference. First operand 411 states and 482 transitions. Second operand has 29 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 24 states have internal predecessors, (75), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 18:38:06,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:06,950 INFO L93 Difference]: Finished difference Result 521 states and 612 transitions. [2022-07-12 18:38:06,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 18:38:06,954 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 24 states have internal predecessors, (75), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 115 [2022-07-12 18:38:06,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:06,955 INFO L225 Difference]: With dead ends: 521 [2022-07-12 18:38:06,955 INFO L226 Difference]: Without dead ends: 521 [2022-07-12 18:38:06,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 18:38:06,956 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 112 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1679 SdHoareTripleChecker+Invalid, 4077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2868 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:06,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 1679 Invalid, 4077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1197 Invalid, 0 Unknown, 2868 Unchecked, 1.5s Time] [2022-07-12 18:38:06,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-07-12 18:38:06,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 418. [2022-07-12 18:38:06,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 309 states have (on average 1.3980582524271845) internal successors, (432), 381 states have internal predecessors, (432), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-12 18:38:06,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 490 transitions. [2022-07-12 18:38:06,977 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 490 transitions. Word has length 115 [2022-07-12 18:38:06,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:06,977 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 490 transitions. [2022-07-12 18:38:06,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 24 states have internal predecessors, (75), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 18:38:06,978 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 490 transitions. [2022-07-12 18:38:06,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-12 18:38:06,978 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:06,978 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] [2022-07-12 18:38:07,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-12 18:38:07,199 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 [2022-07-12 18:38:07,199 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:38:07,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:07,200 INFO L85 PathProgramCache]: Analyzing trace with hash 742530710, now seen corresponding path program 1 times [2022-07-12 18:38:07,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:07,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886108438] [2022-07-12 18:38:07,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:07,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:07,231 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:07,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1977824217] [2022-07-12 18:38:07,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:07,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:07,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:07,242 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) [2022-07-12 18:38:07,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-12 18:38:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:38:07,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 18:38:07,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-12 18:38:07,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:38:07,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:07,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886108438] [2022-07-12 18:38:07,574 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:07,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977824217] [2022-07-12 18:38:07,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977824217] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:38:07,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:38:07,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:38:07,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372007251] [2022-07-12 18:38:07,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:38:07,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:38:07,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:07,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:38:07,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:38:07,576 INFO L87 Difference]: Start difference. First operand 418 states and 490 transitions. Second operand has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 18:38:07,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:07,679 INFO L93 Difference]: Finished difference Result 426 states and 501 transitions. [2022-07-12 18:38:07,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:38:07,679 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 [2022-07-12 18:38:07,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:07,689 INFO L225 Difference]: With dead ends: 426 [2022-07-12 18:38:07,689 INFO L226 Difference]: Without dead ends: 426 [2022-07-12 18:38:07,689 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 [2022-07-12 18:38:07,689 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 130 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:07,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 514 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:38:07,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-07-12 18:38:07,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 417. [2022-07-12 18:38:07,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 309 states have (on average 1.3948220064724919) internal successors, (431), 380 states have internal predecessors, (431), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-12 18:38:07,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 489 transitions. [2022-07-12 18:38:07,715 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 489 transitions. Word has length 116 [2022-07-12 18:38:07,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:07,715 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 489 transitions. [2022-07-12 18:38:07,716 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) [2022-07-12 18:38:07,716 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 489 transitions. [2022-07-12 18:38:07,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-12 18:38:07,716 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:07,716 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] [2022-07-12 18:38:07,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-12 18:38:07,934 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 [2022-07-12 18:38:07,935 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:38:07,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:07,935 INFO L85 PathProgramCache]: Analyzing trace with hash 742530711, now seen corresponding path program 1 times [2022-07-12 18:38:07,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:07,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572219201] [2022-07-12 18:38:07,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:07,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:07,974 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:07,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585174446] [2022-07-12 18:38:07,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:07,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:07,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:07,975 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) [2022-07-12 18:38:07,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-12 18:38:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:38:08,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 18:38:08,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:08,464 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 64 proven. 106 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-07-12 18:38:08,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:38:08,519 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:38:08,519 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 [2022-07-12 18:38:08,755 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 64 proven. 106 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-07-12 18:38:08,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:08,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572219201] [2022-07-12 18:38:08,756 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:08,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585174446] [2022-07-12 18:38:08,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585174446] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:38:08,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:38:08,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-07-12 18:38:08,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103504769] [2022-07-12 18:38:08,756 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:38:08,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 18:38:08,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:08,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 18:38:08,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-07-12 18:38:08,757 INFO L87 Difference]: Start difference. First operand 417 states and 489 transitions. Second operand has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-12 18:38:09,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:09,021 INFO L93 Difference]: Finished difference Result 425 states and 500 transitions. [2022-07-12 18:38:09,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:38:09,022 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 [2022-07-12 18:38:09,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:09,023 INFO L225 Difference]: With dead ends: 425 [2022-07-12 18:38:09,023 INFO L226 Difference]: Without dead ends: 425 [2022-07-12 18:38:09,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-07-12 18:38:09,023 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 340 mSDsluCounter, 2026 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 2244 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:09,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 2244 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:38:09,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-07-12 18:38:09,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 416. [2022-07-12 18:38:09,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 309 states have (on average 1.3915857605177993) internal successors, (430), 379 states have internal predecessors, (430), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-12 18:38:09,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 488 transitions. [2022-07-12 18:38:09,030 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 488 transitions. Word has length 116 [2022-07-12 18:38:09,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:09,030 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 488 transitions. [2022-07-12 18:38:09,030 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) [2022-07-12 18:38:09,030 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 488 transitions. [2022-07-12 18:38:09,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-12 18:38:09,031 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:09,031 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] [2022-07-12 18:38:09,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-12 18:38:09,247 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 [2022-07-12 18:38:09,247 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:38:09,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:09,248 INFO L85 PathProgramCache]: Analyzing trace with hash 607443032, now seen corresponding path program 1 times [2022-07-12 18:38:09,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:09,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996859361] [2022-07-12 18:38:09,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:09,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:09,269 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:09,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1994425167] [2022-07-12 18:38:09,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:09,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:09,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:09,270 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) [2022-07-12 18:38:09,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-12 18:38:09,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:38:09,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 18:38:09,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:09,696 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-12 18:38:09,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:38:09,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:09,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996859361] [2022-07-12 18:38:09,697 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:09,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994425167] [2022-07-12 18:38:09,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994425167] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:38:09,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:38:09,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:38:09,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137434237] [2022-07-12 18:38:09,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:38:09,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:38:09,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:09,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:38:09,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:38:09,699 INFO L87 Difference]: Start difference. First operand 416 states and 488 transitions. Second operand has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-12 18:38:09,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:09,826 INFO L93 Difference]: Finished difference Result 419 states and 493 transitions. [2022-07-12 18:38:09,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:38:09,826 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 [2022-07-12 18:38:09,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:09,828 INFO L225 Difference]: With dead ends: 419 [2022-07-12 18:38:09,828 INFO L226 Difference]: Without dead ends: 419 [2022-07-12 18:38:09,828 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 [2022-07-12 18:38:09,828 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 60 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:09,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 364 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:38:09,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-07-12 18:38:09,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 415. [2022-07-12 18:38:09,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 309 states have (on average 1.3883495145631068) internal successors, (429), 378 states have internal predecessors, (429), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-12 18:38:09,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 487 transitions. [2022-07-12 18:38:09,835 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 487 transitions. Word has length 118 [2022-07-12 18:38:09,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:09,836 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 487 transitions. [2022-07-12 18:38:09,836 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) [2022-07-12 18:38:09,836 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 487 transitions. [2022-07-12 18:38:09,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-12 18:38:09,837 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:09,837 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] [2022-07-12 18:38:09,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-12 18:38:10,063 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 [2022-07-12 18:38:10,063 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:38:10,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:10,063 INFO L85 PathProgramCache]: Analyzing trace with hash -755993409, now seen corresponding path program 1 times [2022-07-12 18:38:10,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:10,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212200970] [2022-07-12 18:38:10,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:10,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:10,085 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:10,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [930901522] [2022-07-12 18:38:10,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:10,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:10,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:10,087 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) [2022-07-12 18:38:10,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-12 18:38:10,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:38:10,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-12 18:38:10,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:10,574 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:38:10,575 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 [2022-07-12 18:38:10,664 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-12 18:38:10,664 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 [2022-07-12 18:38:10,800 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-07-12 18:38:10,800 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 [2022-07-12 18:38:10,922 INFO L356 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-07-12 18:38:10,923 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 3 case distinctions, treesize of input 31 treesize of output 52 [2022-07-12 18:38:11,135 INFO L356 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-07-12 18:38:11,135 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 3 case distinctions, treesize of input 38 treesize of output 59 [2022-07-12 18:38:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 5 proven. 498 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-12 18:38:11,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:38:11,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:11,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212200970] [2022-07-12 18:38:11,635 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:11,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930901522] [2022-07-12 18:38:11,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930901522] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:38:11,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:38:11,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-07-12 18:38:11,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085240523] [2022-07-12 18:38:11,636 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:38:11,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-12 18:38:11,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:11,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-12 18:38:11,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-07-12 18:38:11,637 INFO L87 Difference]: Start difference. First operand 415 states and 487 transitions. Second operand has 26 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 21 states have internal predecessors, (81), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:38:16,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:16,104 INFO L93 Difference]: Finished difference Result 665 states and 794 transitions. [2022-07-12 18:38:16,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 18:38:16,105 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 [2022-07-12 18:38:16,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:16,106 INFO L225 Difference]: With dead ends: 665 [2022-07-12 18:38:16,106 INFO L226 Difference]: Without dead ends: 665 [2022-07-12 18:38:16,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 115 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=174, Invalid=1230, Unknown=2, NotChecked=0, Total=1406 [2022-07-12 18:38:16,107 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 137 mSDsluCounter, 3003 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 3219 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 658 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:16,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 3219 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 550 Invalid, 0 Unknown, 658 Unchecked, 0.2s Time] [2022-07-12 18:38:16,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-07-12 18:38:16,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 660. [2022-07-12 18:38:16,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 525 states have (on average 1.3085714285714285) internal successors, (687), 594 states have internal predecessors, (687), 52 states have call successors, (52), 13 states have call predecessors, (52), 13 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-07-12 18:38:16,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 791 transitions. [2022-07-12 18:38:16,114 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 791 transitions. Word has length 122 [2022-07-12 18:38:16,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:16,114 INFO L495 AbstractCegarLoop]: Abstraction has 660 states and 791 transitions. [2022-07-12 18:38:16,115 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) [2022-07-12 18:38:16,115 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 791 transitions. [2022-07-12 18:38:16,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-12 18:38:16,115 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:16,115 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] [2022-07-12 18:38:16,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-12 18:38:16,343 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 [2022-07-12 18:38:16,344 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:38:16,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:16,344 INFO L85 PathProgramCache]: Analyzing trace with hash -755993408, now seen corresponding path program 1 times [2022-07-12 18:38:16,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:16,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693173300] [2022-07-12 18:38:16,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:16,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:16,365 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:16,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592797948] [2022-07-12 18:38:16,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:16,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:16,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:16,366 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) [2022-07-12 18:38:16,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-12 18:38:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:38:17,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 168 conjunts are in the unsatisfiable core [2022-07-12 18:38:17,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:17,136 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 [2022-07-12 18:38:17,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-12 18:38:18,051 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:38:18,051 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 [2022-07-12 18:38:18,085 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:38:18,085 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 [2022-07-12 18:38:18,438 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:38:18,439 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 [2022-07-12 18:38:18,485 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-12 18:38:18,486 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 [2022-07-12 18:38:18,788 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:38:18,788 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 [2022-07-12 18:38:18,829 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-07-12 18:38:18,829 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 [2022-07-12 18:38:19,439 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-07-12 18:38:19,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 32 treesize of output 57 [2022-07-12 18:38:19,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-12 18:38:19,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:38:19,821 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 [2022-07-12 18:38:19,849 INFO L356 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2022-07-12 18:38:19,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 39 [2022-07-12 18:38:20,134 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 20 proven. 342 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2022-07-12 18:38:20,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:38:20,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:20,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693173300] [2022-07-12 18:38:20,414 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:20,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592797948] [2022-07-12 18:38:20,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592797948] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:38:20,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:38:20,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-07-12 18:38:20,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112307923] [2022-07-12 18:38:20,414 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:38:20,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-12 18:38:20,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:20,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-12 18:38:20,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2022-07-12 18:38:20,416 INFO L87 Difference]: Start difference. First operand 660 states and 791 transitions. Second operand has 29 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:38:22,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:22,952 INFO L93 Difference]: Finished difference Result 785 states and 937 transitions. [2022-07-12 18:38:22,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 18:38:22,955 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 122 [2022-07-12 18:38:22,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:22,957 INFO L225 Difference]: With dead ends: 785 [2022-07-12 18:38:22,957 INFO L226 Difference]: Without dead ends: 785 [2022-07-12 18:38:22,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 114 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=170, Invalid=1236, Unknown=0, NotChecked=0, Total=1406 [2022-07-12 18:38:22,958 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 115 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 2178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1110 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:22,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 788 Invalid, 2178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1055 Invalid, 0 Unknown, 1110 Unchecked, 2.0s Time] [2022-07-12 18:38:22,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-07-12 18:38:22,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 667. [2022-07-12 18:38:22,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 532 states have (on average 1.306390977443609) internal successors, (695), 601 states have internal predecessors, (695), 52 states have call successors, (52), 13 states have call predecessors, (52), 13 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-07-12 18:38:22,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 799 transitions. [2022-07-12 18:38:22,972 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 799 transitions. Word has length 122 [2022-07-12 18:38:22,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:22,973 INFO L495 AbstractCegarLoop]: Abstraction has 667 states and 799 transitions. [2022-07-12 18:38:22,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:38:22,973 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 799 transitions. [2022-07-12 18:38:22,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-12 18:38:22,973 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:22,973 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:38:22,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-12 18:38:23,187 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 [2022-07-12 18:38:23,187 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:38:23,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:23,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1960959122, now seen corresponding path program 1 times [2022-07-12 18:38:23,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:23,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565971353] [2022-07-12 18:38:23,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:23,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:23,210 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:23,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432615140] [2022-07-12 18:38:23,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:23,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:23,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:23,213 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) [2022-07-12 18:38:23,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-12 18:38:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:38:23,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 18:38:23,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-12 18:38:23,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:38:23,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:23,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565971353] [2022-07-12 18:38:23,661 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:23,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432615140] [2022-07-12 18:38:23,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432615140] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:38:23,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:38:23,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:38:23,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602812837] [2022-07-12 18:38:23,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:38:23,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:38:23,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:23,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:38:23,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:38:23,662 INFO L87 Difference]: Start difference. First operand 667 states and 799 transitions. Second operand has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 18:38:23,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:23,769 INFO L93 Difference]: Finished difference Result 670 states and 803 transitions. [2022-07-12 18:38:23,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:38:23,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 123 [2022-07-12 18:38:23,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:23,771 INFO L225 Difference]: With dead ends: 670 [2022-07-12 18:38:23,771 INFO L226 Difference]: Without dead ends: 670 [2022-07-12 18:38:23,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:38:23,772 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 102 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:23,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 511 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:38:23,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-07-12 18:38:23,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 666. [2022-07-12 18:38:23,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 532 states have (on average 1.3045112781954886) internal successors, (694), 600 states have internal predecessors, (694), 52 states have call successors, (52), 13 states have call predecessors, (52), 13 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-07-12 18:38:23,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 798 transitions. [2022-07-12 18:38:23,780 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 798 transitions. Word has length 123 [2022-07-12 18:38:23,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:23,780 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 798 transitions. [2022-07-12 18:38:23,780 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) [2022-07-12 18:38:23,781 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 798 transitions. [2022-07-12 18:38:23,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-12 18:38:23,781 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:23,781 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:38:23,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-12 18:38:23,995 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 [2022-07-12 18:38:23,995 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:38:23,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:23,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1960959121, now seen corresponding path program 1 times [2022-07-12 18:38:23,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:23,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192176543] [2022-07-12 18:38:23,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:23,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:24,031 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:24,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1116185879] [2022-07-12 18:38:24,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:24,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:24,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:24,032 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) [2022-07-12 18:38:24,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-12 18:38:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:38:25,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 144 conjunts are in the unsatisfiable core [2022-07-12 18:38:25,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:25,130 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 [2022-07-12 18:38:25,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:38:25,460 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:38:25,460 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 [2022-07-12 18:38:25,465 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 [2022-07-12 18:38:25,808 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:38:25,809 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 [2022-07-12 18:38:25,816 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 [2022-07-12 18:38:26,164 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:38:26,165 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 [2022-07-12 18:38:26,188 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-12 18:38:26,189 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 [2022-07-12 18:38:26,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:38:26,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 18:38:26,400 INFO L356 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-07-12 18:38:26,400 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 [2022-07-12 18:38:26,475 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 242 proven. 300 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-07-12 18:38:26,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:38:26,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:26,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192176543] [2022-07-12 18:38:26,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:26,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116185879] [2022-07-12 18:38:26,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116185879] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:38:26,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:38:26,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2022-07-12 18:38:26,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799815418] [2022-07-12 18:38:26,702 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:38:26,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 18:38:26,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:26,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 18:38:26,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 18:38:26,703 INFO L87 Difference]: Start difference. First operand 666 states and 798 transitions. Second operand has 34 states, 31 states have (on average 2.967741935483871) internal successors, (92), 29 states have internal predecessors, (92), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 18:38:28,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:28,433 INFO L93 Difference]: Finished difference Result 868 states and 1043 transitions. [2022-07-12 18:38:28,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 18:38:28,433 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 2.967741935483871) internal successors, (92), 29 states have internal predecessors, (92), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 123 [2022-07-12 18:38:28,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:28,436 INFO L225 Difference]: With dead ends: 868 [2022-07-12 18:38:28,436 INFO L226 Difference]: Without dead ends: 868 [2022-07-12 18:38:28,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=198, Invalid=1608, Unknown=0, NotChecked=0, Total=1806 [2022-07-12 18:38:28,436 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 189 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 2272 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 3090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 781 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:28,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 762 Invalid, 3090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2272 Invalid, 0 Unknown, 781 Unchecked, 1.5s Time] [2022-07-12 18:38:28,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-07-12 18:38:28,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 674. [2022-07-12 18:38:28,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 540 states have (on average 1.3055555555555556) internal successors, (705), 608 states have internal predecessors, (705), 52 states have call successors, (52), 13 states have call predecessors, (52), 13 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-07-12 18:38:28,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 809 transitions. [2022-07-12 18:38:28,446 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 809 transitions. Word has length 123 [2022-07-12 18:38:28,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:28,446 INFO L495 AbstractCegarLoop]: Abstraction has 674 states and 809 transitions. [2022-07-12 18:38:28,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 2.967741935483871) internal successors, (92), 29 states have internal predecessors, (92), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 18:38:28,446 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 809 transitions. [2022-07-12 18:38:28,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-12 18:38:28,447 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:28,447 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:38:28,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-12 18:38:28,670 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 [2022-07-12 18:38:28,670 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:38:28,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:28,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1008929263, now seen corresponding path program 1 times [2022-07-12 18:38:28,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:28,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557483547] [2022-07-12 18:38:28,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:28,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:28,701 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:28,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671166987] [2022-07-12 18:38:28,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:28,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:28,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:28,702 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) [2022-07-12 18:38:28,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-12 18:38:29,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:38:29,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 18:38:29,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:29,133 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-12 18:38:29,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:38:29,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:29,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557483547] [2022-07-12 18:38:29,134 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:29,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671166987] [2022-07-12 18:38:29,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671166987] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:38:29,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:38:29,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:38:29,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429662029] [2022-07-12 18:38:29,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:38:29,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:38:29,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:29,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:38:29,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:38:29,136 INFO L87 Difference]: Start difference. First operand 674 states and 809 transitions. Second operand has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-12 18:38:29,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:29,219 INFO L93 Difference]: Finished difference Result 675 states and 811 transitions. [2022-07-12 18:38:29,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:38:29,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 125 [2022-07-12 18:38:29,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:29,222 INFO L225 Difference]: With dead ends: 675 [2022-07-12 18:38:29,222 INFO L226 Difference]: Without dead ends: 675 [2022-07-12 18:38:29,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:38:29,222 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 25 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:29,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 386 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:38:29,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-07-12 18:38:29,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 673. [2022-07-12 18:38:29,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 540 states have (on average 1.3037037037037038) internal successors, (704), 607 states have internal predecessors, (704), 52 states have call successors, (52), 13 states have call predecessors, (52), 13 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-07-12 18:38:29,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 808 transitions. [2022-07-12 18:38:29,234 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 808 transitions. Word has length 125 [2022-07-12 18:38:29,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:29,234 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 808 transitions. [2022-07-12 18:38:29,234 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) [2022-07-12 18:38:29,234 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 808 transitions. [2022-07-12 18:38:29,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-12 18:38:29,235 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:29,235 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:38:29,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-12 18:38:29,447 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 [2022-07-12 18:38:29,447 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:38:29,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:29,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1008929264, now seen corresponding path program 1 times [2022-07-12 18:38:29,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:29,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743271715] [2022-07-12 18:38:29,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:29,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:29,472 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:29,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [576852188] [2022-07-12 18:38:29,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:29,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:29,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:29,473 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) [2022-07-12 18:38:29,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-12 18:38:29,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:38:29,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 18:38:29,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-12 18:38:29,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:38:29,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:29,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743271715] [2022-07-12 18:38:29,938 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:29,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576852188] [2022-07-12 18:38:29,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576852188] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:38:29,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:38:29,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:38:29,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134376938] [2022-07-12 18:38:29,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:38:29,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:38:29,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:29,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:38:29,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:38:29,940 INFO L87 Difference]: Start difference. First operand 673 states and 808 transitions. Second operand has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-12 18:38:30,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:30,062 INFO L93 Difference]: Finished difference Result 674 states and 810 transitions. [2022-07-12 18:38:30,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:38:30,063 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 125 [2022-07-12 18:38:30,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:30,064 INFO L225 Difference]: With dead ends: 674 [2022-07-12 18:38:30,065 INFO L226 Difference]: Without dead ends: 674 [2022-07-12 18:38:30,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:38:30,065 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 46 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:30,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 369 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:38:30,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-07-12 18:38:30,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 672. [2022-07-12 18:38:30,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 540 states have (on average 1.3018518518518518) internal successors, (703), 606 states have internal predecessors, (703), 52 states have call successors, (52), 13 states have call predecessors, (52), 13 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-07-12 18:38:30,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 807 transitions. [2022-07-12 18:38:30,072 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 807 transitions. Word has length 125 [2022-07-12 18:38:30,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:30,072 INFO L495 AbstractCegarLoop]: Abstraction has 672 states and 807 transitions. [2022-07-12 18:38:30,072 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) [2022-07-12 18:38:30,072 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 807 transitions. [2022-07-12 18:38:30,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-12 18:38:30,073 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:30,073 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:38:30,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-12 18:38:30,290 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 [2022-07-12 18:38:30,290 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:38:30,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:30,291 INFO L85 PathProgramCache]: Analyzing trace with hash -20549672, now seen corresponding path program 1 times [2022-07-12 18:38:30,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:30,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473894903] [2022-07-12 18:38:30,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:30,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:30,313 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:30,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [59031048] [2022-07-12 18:38:30,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:30,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:30,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:30,315 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) [2022-07-12 18:38:30,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-12 18:38:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:38:30,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 133 conjunts are in the unsatisfiable core [2022-07-12 18:38:30,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:30,945 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:38:30,945 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 [2022-07-12 18:38:30,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 18:38:31,119 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:38:31,119 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 [2022-07-12 18:38:31,143 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-12 18:38:31,144 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 [2022-07-12 18:38:31,375 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:38:31,376 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 18 [2022-07-12 18:38:31,407 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-07-12 18:38:31,408 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 [2022-07-12 18:38:31,653 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:38:31,653 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 [2022-07-12 18:38:31,682 INFO L356 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-07-12 18:38:31,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 42 [2022-07-12 18:38:32,054 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:38:32,055 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 [2022-07-12 18:38:32,126 INFO L356 Elim1Store]: treesize reduction 40, result has 68.0 percent of original size [2022-07-12 18:38:32,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 133 [2022-07-12 18:38:33,684 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:38:33,684 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 [2022-07-12 18:38:33,773 INFO L356 Elim1Store]: treesize reduction 12, result has 92.9 percent of original size [2022-07-12 18:38:33,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 87 treesize of output 225 [2022-07-12 18:38:34,466 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 32 proven. 466 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-07-12 18:38:34,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:38:34,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:34,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473894903] [2022-07-12 18:38:34,925 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:34,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59031048] [2022-07-12 18:38:34,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59031048] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:38:34,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:38:34,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2022-07-12 18:38:34,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813252360] [2022-07-12 18:38:34,925 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:38:34,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-12 18:38:34,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:34,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-12 18:38:34,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1600, Unknown=0, NotChecked=0, Total=1806 [2022-07-12 18:38:34,926 INFO L87 Difference]: Start difference. First operand 672 states and 807 transitions. Second operand has 38 states, 34 states have (on average 2.588235294117647) internal successors, (88), 30 states have internal predecessors, (88), 5 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:38:35,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:35,250 INFO L93 Difference]: Finished difference Result 780 states and 929 transitions. [2022-07-12 18:38:35,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 18:38:35,250 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 2.588235294117647) internal successors, (88), 30 states have internal predecessors, (88), 5 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 129 [2022-07-12 18:38:35,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:35,253 INFO L225 Difference]: With dead ends: 780 [2022-07-12 18:38:35,253 INFO L226 Difference]: Without dead ends: 780 [2022-07-12 18:38:35,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-07-12 18:38:35,255 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 61 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1780 SdHoareTripleChecker+Invalid, 1931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1777 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:35,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 1780 Invalid, 1931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 149 Invalid, 0 Unknown, 1777 Unchecked, 0.2s Time] [2022-07-12 18:38:35,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-07-12 18:38:35,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 773. [2022-07-12 18:38:35,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 631 states have (on average 1.2725832012678289) internal successors, (803), 697 states have internal predecessors, (803), 58 states have call successors, (58), 17 states have call predecessors, (58), 17 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-07-12 18:38:35,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 919 transitions. [2022-07-12 18:38:35,268 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 919 transitions. Word has length 129 [2022-07-12 18:38:35,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:35,268 INFO L495 AbstractCegarLoop]: Abstraction has 773 states and 919 transitions. [2022-07-12 18:38:35,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 2.588235294117647) internal successors, (88), 30 states have internal predecessors, (88), 5 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 18:38:35,268 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 919 transitions. [2022-07-12 18:38:35,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-12 18:38:35,273 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:35,273 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:38:35,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-12 18:38:35,495 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 [2022-07-12 18:38:35,495 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:38:35,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:35,496 INFO L85 PathProgramCache]: Analyzing trace with hash -20549673, now seen corresponding path program 1 times [2022-07-12 18:38:35,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:35,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517915610] [2022-07-12 18:38:35,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:35,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:35,516 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:35,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1348626022] [2022-07-12 18:38:35,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:35,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:35,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:35,518 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) [2022-07-12 18:38:35,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-12 18:38:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:38:36,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-12 18:38:36,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:36,178 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:38:36,179 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 [2022-07-12 18:38:36,239 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:38:36,239 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 [2022-07-12 18:38:36,275 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:38:36,276 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 [2022-07-12 18:38:36,312 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:38:36,312 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 [2022-07-12 18:38:36,347 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:38:36,348 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 [2022-07-12 18:38:36,386 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:38:36,387 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 [2022-07-12 18:38:36,426 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-12 18:38:36,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:38:36,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:36,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517915610] [2022-07-12 18:38:36,426 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:36,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348626022] [2022-07-12 18:38:36,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348626022] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:38:36,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:38:36,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:38:36,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680958874] [2022-07-12 18:38:36,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:38:36,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:38:36,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:36,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:38:36,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:38:36,428 INFO L87 Difference]: Start difference. First operand 773 states and 919 transitions. Second operand has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-12 18:38:36,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:36,631 INFO L93 Difference]: Finished difference Result 1401 states and 1682 transitions. [2022-07-12 18:38:36,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:38:36,632 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 129 [2022-07-12 18:38:36,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:36,635 INFO L225 Difference]: With dead ends: 1401 [2022-07-12 18:38:36,635 INFO L226 Difference]: Without dead ends: 1401 [2022-07-12 18:38:36,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 112 SyntacticMatches, 11 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:38:36,636 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 162 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 258 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:36,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 974 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 370 Invalid, 0 Unknown, 258 Unchecked, 0.2s Time] [2022-07-12 18:38:36,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2022-07-12 18:38:36,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1251. [2022-07-12 18:38:36,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1056 states have (on average 1.2490530303030303) internal successors, (1319), 1122 states have internal predecessors, (1319), 99 states have call successors, (99), 29 states have call predecessors, (99), 29 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-07-12 18:38:36,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 1517 transitions. [2022-07-12 18:38:36,648 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 1517 transitions. Word has length 129 [2022-07-12 18:38:36,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:36,648 INFO L495 AbstractCegarLoop]: Abstraction has 1251 states and 1517 transitions. [2022-07-12 18:38:36,648 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) [2022-07-12 18:38:36,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 1517 transitions. [2022-07-12 18:38:36,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-12 18:38:36,649 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:36,649 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:38:36,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-12 18:38:36,867 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 [2022-07-12 18:38:36,867 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:38:36,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:36,867 INFO L85 PathProgramCache]: Analyzing trace with hash -637039764, now seen corresponding path program 1 times [2022-07-12 18:38:36,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:36,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347385539] [2022-07-12 18:38:36,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:36,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:36,887 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:36,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989608584] [2022-07-12 18:38:36,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:36,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:36,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:36,888 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) [2022-07-12 18:38:36,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-12 18:38:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:38:37,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 18:38:37,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:37,404 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-12 18:38:37,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:38:37,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:37,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347385539] [2022-07-12 18:38:37,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:37,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989608584] [2022-07-12 18:38:37,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989608584] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:38:37,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:38:37,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:38:37,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000716589] [2022-07-12 18:38:37,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:38:37,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:38:37,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:37,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:38:37,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:38:37,407 INFO L87 Difference]: Start difference. First operand 1251 states and 1517 transitions. Second operand has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 18:38:37,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:37,499 INFO L93 Difference]: Finished difference Result 1250 states and 1515 transitions. [2022-07-12 18:38:37,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:38:37,499 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 130 [2022-07-12 18:38:37,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:37,520 INFO L225 Difference]: With dead ends: 1250 [2022-07-12 18:38:37,521 INFO L226 Difference]: Without dead ends: 1250 [2022-07-12 18:38:37,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:38:37,521 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 76 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:37,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 510 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:38:37,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2022-07-12 18:38:37,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1250. [2022-07-12 18:38:37,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1056 states have (on average 1.2471590909090908) internal successors, (1317), 1121 states have internal predecessors, (1317), 99 states have call successors, (99), 29 states have call predecessors, (99), 29 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-07-12 18:38:37,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1515 transitions. [2022-07-12 18:38:37,547 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1515 transitions. Word has length 130 [2022-07-12 18:38:37,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:37,548 INFO L495 AbstractCegarLoop]: Abstraction has 1250 states and 1515 transitions. [2022-07-12 18:38:37,548 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) [2022-07-12 18:38:37,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1515 transitions. [2022-07-12 18:38:37,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-12 18:38:37,549 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:37,549 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:38:37,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-12 18:38:37,769 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 [2022-07-12 18:38:37,769 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:38:37,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:37,770 INFO L85 PathProgramCache]: Analyzing trace with hash -637039763, now seen corresponding path program 1 times [2022-07-12 18:38:37,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:37,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188289745] [2022-07-12 18:38:37,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:37,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:37,808 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:37,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1673409403] [2022-07-12 18:38:37,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:37,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:37,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:37,811 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) [2022-07-12 18:38:37,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-12 18:38:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:38:38,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 18:38:38,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-07-12 18:38:38,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:38:38,604 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:38:38,605 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 [2022-07-12 18:38:39,032 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-07-12 18:38:39,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:39,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188289745] [2022-07-12 18:38:39,032 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:39,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673409403] [2022-07-12 18:38:39,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673409403] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:38:39,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:38:39,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-07-12 18:38:39,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294684472] [2022-07-12 18:38:39,033 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:38:39,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 18:38:39,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:39,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 18:38:39,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-07-12 18:38:39,034 INFO L87 Difference]: Start difference. First operand 1250 states and 1515 transitions. Second operand has 18 states, 17 states have (on average 6.588235294117647) internal successors, (112), 16 states have internal predecessors, (112), 3 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-12 18:38:39,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:39,338 INFO L93 Difference]: Finished difference Result 1249 states and 1513 transitions. [2022-07-12 18:38:39,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:38:39,339 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 6.588235294117647) internal successors, (112), 16 states have internal predecessors, (112), 3 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 130 [2022-07-12 18:38:39,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:39,342 INFO L225 Difference]: With dead ends: 1249 [2022-07-12 18:38:39,342 INFO L226 Difference]: Without dead ends: 1249 [2022-07-12 18:38:39,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-07-12 18:38:39,342 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 290 mSDsluCounter, 1877 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 2092 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:39,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 2092 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:38:39,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2022-07-12 18:38:39,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1249. [2022-07-12 18:38:39,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1056 states have (on average 1.2452651515151516) internal successors, (1315), 1120 states have internal predecessors, (1315), 99 states have call successors, (99), 29 states have call predecessors, (99), 29 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-07-12 18:38:39,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1513 transitions. [2022-07-12 18:38:39,375 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1513 transitions. Word has length 130 [2022-07-12 18:38:39,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:39,375 INFO L495 AbstractCegarLoop]: Abstraction has 1249 states and 1513 transitions. [2022-07-12 18:38:39,375 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) [2022-07-12 18:38:39,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1513 transitions. [2022-07-12 18:38:39,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-12 18:38:39,375 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:39,376 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:38:39,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-12 18:38:39,576 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 [2022-07-12 18:38:39,576 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:38:39,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:39,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1985113390, now seen corresponding path program 1 times [2022-07-12 18:38:39,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:39,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300504872] [2022-07-12 18:38:39,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:39,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:39,602 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:39,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510035154] [2022-07-12 18:38:39,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:39,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:39,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:39,606 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) [2022-07-12 18:38:39,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-12 18:38:40,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:38:40,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 18:38:40,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-12 18:38:40,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:38:40,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:40,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300504872] [2022-07-12 18:38:40,219 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:40,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510035154] [2022-07-12 18:38:40,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510035154] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:38:40,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:38:40,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:38:40,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981938008] [2022-07-12 18:38:40,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:38:40,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:38:40,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:40,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:38:40,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:38:40,221 INFO L87 Difference]: Start difference. First operand 1249 states and 1513 transitions. Second operand has 3 states, 2 states have (on average 27.5) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-12 18:38:40,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:40,373 INFO L93 Difference]: Finished difference Result 1248 states and 1511 transitions. [2022-07-12 18:38:40,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:38:40,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 27.5) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 132 [2022-07-12 18:38:40,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:40,377 INFO L225 Difference]: With dead ends: 1248 [2022-07-12 18:38:40,377 INFO L226 Difference]: Without dead ends: 1248 [2022-07-12 18:38:40,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:38:40,377 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 31 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:40,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 375 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:38:40,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-07-12 18:38:40,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1248. [2022-07-12 18:38:40,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1056 states have (on average 1.2433712121212122) internal successors, (1313), 1119 states have internal predecessors, (1313), 99 states have call successors, (99), 29 states have call predecessors, (99), 29 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-07-12 18:38:40,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 1511 transitions. [2022-07-12 18:38:40,389 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 1511 transitions. Word has length 132 [2022-07-12 18:38:40,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:40,389 INFO L495 AbstractCegarLoop]: Abstraction has 1248 states and 1511 transitions. [2022-07-12 18:38:40,389 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) [2022-07-12 18:38:40,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 1511 transitions. [2022-07-12 18:38:40,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-12 18:38:40,390 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:40,390 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:38:40,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-12 18:38:40,607 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 [2022-07-12 18:38:40,608 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:38:40,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:40,608 INFO L85 PathProgramCache]: Analyzing trace with hash 22933, now seen corresponding path program 1 times [2022-07-12 18:38:40,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:40,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746080733] [2022-07-12 18:38:40,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:40,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:40,648 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:40,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [844034074] [2022-07-12 18:38:40,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:40,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:40,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:40,659 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) [2022-07-12 18:38:40,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-12 18:38:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:38:41,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:38:41,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:41,448 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-12 18:38:41,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:38:41,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:41,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746080733] [2022-07-12 18:38:41,448 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:41,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844034074] [2022-07-12 18:38:41,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844034074] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:38:41,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:38:41,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:38:41,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881799290] [2022-07-12 18:38:41,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:38:41,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:38:41,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:41,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:38:41,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:38:41,449 INFO L87 Difference]: Start difference. First operand 1248 states and 1511 transitions. Second operand has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-12 18:38:41,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:41,605 INFO L93 Difference]: Finished difference Result 1361 states and 1643 transitions. [2022-07-12 18:38:41,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:38:41,606 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 136 [2022-07-12 18:38:41,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:41,609 INFO L225 Difference]: With dead ends: 1361 [2022-07-12 18:38:41,609 INFO L226 Difference]: Without dead ends: 1361 [2022-07-12 18:38:41,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:38:41,609 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 599 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:41,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [599 Valid, 327 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:38:41,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2022-07-12 18:38:41,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1295. [2022-07-12 18:38:41,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1105 states have (on average 1.2633484162895927) internal successors, (1396), 1161 states have internal predecessors, (1396), 99 states have call successors, (99), 29 states have call predecessors, (99), 30 states have return successors, (104), 104 states have call predecessors, (104), 99 states have call successors, (104) [2022-07-12 18:38:41,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1599 transitions. [2022-07-12 18:38:41,636 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1599 transitions. Word has length 136 [2022-07-12 18:38:41,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:41,636 INFO L495 AbstractCegarLoop]: Abstraction has 1295 states and 1599 transitions. [2022-07-12 18:38:41,636 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) [2022-07-12 18:38:41,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1599 transitions. [2022-07-12 18:38:41,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-12 18:38:41,637 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:41,637 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:38:41,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-12 18:38:41,857 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 [2022-07-12 18:38:41,857 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:38:41,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:41,857 INFO L85 PathProgramCache]: Analyzing trace with hash 22934, now seen corresponding path program 1 times [2022-07-12 18:38:41,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:41,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517964067] [2022-07-12 18:38:41,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:41,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:41,881 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:41,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1456683820] [2022-07-12 18:38:41,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:41,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:41,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:41,883 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) [2022-07-12 18:38:41,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-12 18:38:42,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:38:42,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 18:38:42,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:42,816 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-12 18:38:42,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:38:42,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:42,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517964067] [2022-07-12 18:38:42,817 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:42,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456683820] [2022-07-12 18:38:42,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456683820] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:38:42,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:38:42,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:38:42,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739583877] [2022-07-12 18:38:42,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:38:42,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:38:42,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:42,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:38:42,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:38:42,818 INFO L87 Difference]: Start difference. First operand 1295 states and 1599 transitions. Second operand has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-12 18:38:42,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:42,948 INFO L93 Difference]: Finished difference Result 1290 states and 1589 transitions. [2022-07-12 18:38:42,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:38:42,948 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 136 [2022-07-12 18:38:42,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:42,951 INFO L225 Difference]: With dead ends: 1290 [2022-07-12 18:38:42,951 INFO L226 Difference]: Without dead ends: 1290 [2022-07-12 18:38:42,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:38:42,952 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 250 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:42,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 328 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:38:42,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2022-07-12 18:38:42,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 1289. [2022-07-12 18:38:42,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1105 states have (on average 1.253393665158371) internal successors, (1385), 1155 states have internal predecessors, (1385), 99 states have call successors, (99), 29 states have call predecessors, (99), 30 states have return successors, (104), 104 states have call predecessors, (104), 99 states have call successors, (104) [2022-07-12 18:38:42,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 1588 transitions. [2022-07-12 18:38:42,963 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 1588 transitions. Word has length 136 [2022-07-12 18:38:42,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:42,963 INFO L495 AbstractCegarLoop]: Abstraction has 1289 states and 1588 transitions. [2022-07-12 18:38:42,963 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) [2022-07-12 18:38:42,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 1588 transitions. [2022-07-12 18:38:42,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-12 18:38:42,964 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:42,964 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:38:42,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-07-12 18:38:43,179 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 [2022-07-12 18:38:43,179 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting l0_destroyErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:38:43,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:43,180 INFO L85 PathProgramCache]: Analyzing trace with hash -283985079, now seen corresponding path program 1 times [2022-07-12 18:38:43,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:43,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100578039] [2022-07-12 18:38:43,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:43,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:43,236 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:43,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1036746190] [2022-07-12 18:38:43,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:43,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:43,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:43,238 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) [2022-07-12 18:38:43,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-12 18:38:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:38:43,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 18:38:43,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:43,859 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-12 18:38:43,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:38:43,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:43,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100578039] [2022-07-12 18:38:43,859 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:43,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036746190] [2022-07-12 18:38:43,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036746190] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:38:43,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:38:43,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:38:43,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829381069] [2022-07-12 18:38:43,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:38:43,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:38:43,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:43,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:38:43,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:38:43,860 INFO L87 Difference]: Start difference. First operand 1289 states and 1588 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-12 18:38:43,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:43,879 INFO L93 Difference]: Finished difference Result 1429 states and 1770 transitions. [2022-07-12 18:38:43,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:38:43,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 140 [2022-07-12 18:38:43,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:43,883 INFO L225 Difference]: With dead ends: 1429 [2022-07-12 18:38:43,883 INFO L226 Difference]: Without dead ends: 1429 [2022-07-12 18:38:43,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:38:43,883 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 215 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:43,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 671 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:38:43,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1429 states. [2022-07-12 18:38:43,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1429 to 1394. [2022-07-12 18:38:43,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1208 states have (on average 1.2971854304635762) internal successors, (1567), 1259 states have internal predecessors, (1567), 99 states have call successors, (99), 30 states have call predecessors, (99), 32 states have return successors, (104), 104 states have call predecessors, (104), 99 states have call successors, (104) [2022-07-12 18:38:43,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 1770 transitions. [2022-07-12 18:38:43,896 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 1770 transitions. Word has length 140 [2022-07-12 18:38:43,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:43,896 INFO L495 AbstractCegarLoop]: Abstraction has 1394 states and 1770 transitions. [2022-07-12 18:38:43,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-12 18:38:43,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 1770 transitions. [2022-07-12 18:38:43,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-12 18:38:43,897 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:43,897 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:38:43,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-07-12 18:38:44,117 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 [2022-07-12 18:38:44,118 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:38:44,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:44,118 INFO L85 PathProgramCache]: Analyzing trace with hash -283990552, now seen corresponding path program 1 times [2022-07-12 18:38:44,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:44,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648631726] [2022-07-12 18:38:44,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:44,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:44,144 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:44,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943990369] [2022-07-12 18:38:44,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:44,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:44,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:44,147 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) [2022-07-12 18:38:44,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-12 18:38:44,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:38:44,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-12 18:38:44,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:45,169 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 [2022-07-12 18:38:45,189 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 [2022-07-12 18:38:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-12 18:38:45,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:38:45,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:45,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648631726] [2022-07-12 18:38:45,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:45,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943990369] [2022-07-12 18:38:45,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943990369] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:38:45,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:38:45,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 18:38:45,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723233118] [2022-07-12 18:38:45,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:38:45,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 18:38:45,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:45,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 18:38:45,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:38:45,207 INFO L87 Difference]: Start difference. First operand 1394 states and 1770 transitions. Second operand has 9 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-12 18:38:45,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:45,664 INFO L93 Difference]: Finished difference Result 1704 states and 2140 transitions. [2022-07-12 18:38:45,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 18:38:45,665 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 140 [2022-07-12 18:38:45,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:45,668 INFO L225 Difference]: With dead ends: 1704 [2022-07-12 18:38:45,668 INFO L226 Difference]: Without dead ends: 1704 [2022-07-12 18:38:45,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:38:45,668 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 804 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:45,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [808 Valid, 1045 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:38:45,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1704 states. [2022-07-12 18:38:45,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1704 to 1466. [2022-07-12 18:38:45,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1281 states have (on average 1.3224043715846994) internal successors, (1694), 1331 states have internal predecessors, (1694), 99 states have call successors, (99), 30 states have call predecessors, (99), 32 states have return successors, (104), 104 states have call predecessors, (104), 99 states have call successors, (104) [2022-07-12 18:38:45,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 1897 transitions. [2022-07-12 18:38:45,682 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 1897 transitions. Word has length 140 [2022-07-12 18:38:45,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:45,682 INFO L495 AbstractCegarLoop]: Abstraction has 1466 states and 1897 transitions. [2022-07-12 18:38:45,682 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) [2022-07-12 18:38:45,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 1897 transitions. [2022-07-12 18:38:45,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-12 18:38:45,683 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:45,683 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:38:45,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-12 18:38:45,903 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 [2022-07-12 18:38:45,903 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:38:45,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:45,903 INFO L85 PathProgramCache]: Analyzing trace with hash -283990551, now seen corresponding path program 1 times [2022-07-12 18:38:45,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:45,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429143737] [2022-07-12 18:38:45,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:45,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:45,929 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:45,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368424813] [2022-07-12 18:38:45,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:45,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:45,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:45,931 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) [2022-07-12 18:38:45,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-12 18:38:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:38:46,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-12 18:38:46,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:47,170 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 [2022-07-12 18:38:47,202 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 [2022-07-12 18:38:47,237 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 [2022-07-12 18:38:47,239 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 [2022-07-12 18:38:47,302 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-12 18:38:47,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:38:47,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:47,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429143737] [2022-07-12 18:38:47,303 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:47,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368424813] [2022-07-12 18:38:47,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368424813] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:38:47,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:38:47,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 18:38:47,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751724947] [2022-07-12 18:38:47,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:38:47,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 18:38:47,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:47,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 18:38:47,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:38:47,305 INFO L87 Difference]: Start difference. First operand 1466 states and 1897 transitions. Second operand has 11 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 18:38:47,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:47,903 INFO L93 Difference]: Finished difference Result 1627 states and 2060 transitions. [2022-07-12 18:38:47,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:38:47,904 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 140 [2022-07-12 18:38:47,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:47,909 INFO L225 Difference]: With dead ends: 1627 [2022-07-12 18:38:47,909 INFO L226 Difference]: Without dead ends: 1627 [2022-07-12 18:38:47,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-07-12 18:38:47,909 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 1163 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:47,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1163 Valid, 1130 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:38:47,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2022-07-12 18:38:47,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1553. [2022-07-12 18:38:47,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1553 states, 1368 states have (on average 1.3523391812865497) internal successors, (1850), 1418 states have internal predecessors, (1850), 99 states have call successors, (99), 30 states have call predecessors, (99), 32 states have return successors, (104), 104 states have call predecessors, (104), 99 states have call successors, (104) [2022-07-12 18:38:47,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1553 states to 1553 states and 2053 transitions. [2022-07-12 18:38:47,925 INFO L78 Accepts]: Start accepts. Automaton has 1553 states and 2053 transitions. Word has length 140 [2022-07-12 18:38:47,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:47,926 INFO L495 AbstractCegarLoop]: Abstraction has 1553 states and 2053 transitions. [2022-07-12 18:38:47,926 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) [2022-07-12 18:38:47,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states and 2053 transitions. [2022-07-12 18:38:47,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-12 18:38:47,927 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:47,927 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] [2022-07-12 18:38:47,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-12 18:38:48,135 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 [2022-07-12 18:38:48,135 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:38:48,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:48,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1734213140, now seen corresponding path program 1 times [2022-07-12 18:38:48,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:48,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340459918] [2022-07-12 18:38:48,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:48,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:48,165 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:48,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [517654308] [2022-07-12 18:38:48,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:48,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:48,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:48,167 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) [2022-07-12 18:38:48,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-12 18:38:48,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:38:48,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-12 18:38:48,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:48,936 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:38:48,937 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 [2022-07-12 18:38:49,003 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:38:49,003 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 [2022-07-12 18:38:49,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 481 proven. 6 refuted. 0 times theorem prover too weak. 690 trivial. 0 not checked. [2022-07-12 18:38:49,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:38:49,211 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 18:38:49,211 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 [2022-07-12 18:38:49,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 481 proven. 6 refuted. 0 times theorem prover too weak. 690 trivial. 0 not checked. [2022-07-12 18:38:49,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:49,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340459918] [2022-07-12 18:38:49,243 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:49,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517654308] [2022-07-12 18:38:49,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517654308] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:38:49,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:38:49,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-07-12 18:38:49,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975038403] [2022-07-12 18:38:49,243 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:38:49,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:38:49,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:49,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:38:49,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:38:49,244 INFO L87 Difference]: Start difference. First operand 1553 states and 2053 transitions. Second operand has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-12 18:38:49,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:49,454 INFO L93 Difference]: Finished difference Result 1655 states and 2163 transitions. [2022-07-12 18:38:49,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:38:49,454 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 [2022-07-12 18:38:49,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:49,458 INFO L225 Difference]: With dead ends: 1655 [2022-07-12 18:38:49,458 INFO L226 Difference]: Without dead ends: 1655 [2022-07-12 18:38:49,458 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 [2022-07-12 18:38:49,459 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 316 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:49,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 1135 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 324 Invalid, 0 Unknown, 262 Unchecked, 0.2s Time] [2022-07-12 18:38:49,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2022-07-12 18:38:49,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 1552. [2022-07-12 18:38:49,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1368 states have (on average 1.340643274853801) internal successors, (1834), 1417 states have internal predecessors, (1834), 99 states have call successors, (99), 30 states have call predecessors, (99), 32 states have return successors, (104), 104 states have call predecessors, (104), 99 states have call successors, (104) [2022-07-12 18:38:49,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 2037 transitions. [2022-07-12 18:38:49,486 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 2037 transitions. Word has length 142 [2022-07-12 18:38:49,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:49,487 INFO L495 AbstractCegarLoop]: Abstraction has 1552 states and 2037 transitions. [2022-07-12 18:38:49,487 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) [2022-07-12 18:38:49,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 2037 transitions. [2022-07-12 18:38:49,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-12 18:38:49,488 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:49,488 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] [2022-07-12 18:38:49,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-12 18:38:49,709 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 [2022-07-12 18:38:49,709 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:38:49,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:49,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1734213139, now seen corresponding path program 1 times [2022-07-12 18:38:49,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:49,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663055217] [2022-07-12 18:38:49,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:49,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:49,737 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:49,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1321283785] [2022-07-12 18:38:49,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:49,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:49,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:49,752 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) [2022-07-12 18:38:49,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-12 18:38:50,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:38:50,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-12 18:38:50,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:50,800 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:38:50,800 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 [2022-07-12 18:38:50,817 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:38:50,818 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 [2022-07-12 18:38:50,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:38:50,951 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 [2022-07-12 18:38:50,960 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-12 18:38:50,961 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 [2022-07-12 18:38:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 503 proven. 196 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2022-07-12 18:38:50,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:38:57,186 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 18:38:57,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:38:57,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663055217] [2022-07-12 18:38:57,187 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 18:38:57,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321283785] [2022-07-12 18:38:57,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321283785] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:38:57,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:38:57,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-07-12 18:38:57,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761996281] [2022-07-12 18:38:57,188 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 18:38:57,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 18:38:57,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:38:57,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 18:38:57,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-07-12 18:38:57,189 INFO L87 Difference]: Start difference. First operand 1552 states and 2037 transitions. Second operand has 21 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-12 18:38:58,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:38:58,561 INFO L93 Difference]: Finished difference Result 1852 states and 2404 transitions. [2022-07-12 18:38:58,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 18:38:58,561 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 [2022-07-12 18:38:58,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:38:58,570 INFO L225 Difference]: With dead ends: 1852 [2022-07-12 18:38:58,575 INFO L226 Difference]: Without dead ends: 1852 [2022-07-12 18:38:58,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 18:38:58,576 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 482 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 1598 SdHoareTripleChecker+Invalid, 3358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1564 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:38:58,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 1598 Invalid, 3358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1678 Invalid, 0 Unknown, 1564 Unchecked, 1.1s Time] [2022-07-12 18:38:58,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2022-07-12 18:38:58,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1551. [2022-07-12 18:38:58,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1368 states have (on average 1.3289473684210527) internal successors, (1818), 1416 states have internal predecessors, (1818), 99 states have call successors, (99), 30 states have call predecessors, (99), 32 states have return successors, (104), 104 states have call predecessors, (104), 99 states have call successors, (104) [2022-07-12 18:38:58,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 2021 transitions. [2022-07-12 18:38:58,593 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 2021 transitions. Word has length 142 [2022-07-12 18:38:58,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:38:58,594 INFO L495 AbstractCegarLoop]: Abstraction has 1551 states and 2021 transitions. [2022-07-12 18:38:58,594 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) [2022-07-12 18:38:58,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 2021 transitions. [2022-07-12 18:38:58,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-12 18:38:58,595 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:38:58,595 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:38:58,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-07-12 18:38:58,811 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 [2022-07-12 18:38:58,811 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-12 18:38:58,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:38:58,812 INFO L85 PathProgramCache]: Analyzing trace with hash 723198554, now seen corresponding path program 1 times [2022-07-12 18:38:58,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:38:58,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738553038] [2022-07-12 18:38:58,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:58,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:38:58,840 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 18:38:58,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995274289] [2022-07-12 18:38:58,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:38:58,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:38:58,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:38:58,843 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) [2022-07-12 18:38:58,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-12 18:38:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:38:59,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-12 18:38:59,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:38:59,815 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:38:59,815 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 [2022-07-12 18:39:00,435 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 [2022-07-12 18:39:00,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:39:00,532 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 [2022-07-12 18:39:00,558 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 [2022-07-12 18:39:00,563 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 [2022-07-12 18:39:00,612 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 [2022-07-12 18:39:00,694 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:39:00,695 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 [2022-07-12 18:39:00,731 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2022-07-12 18:39:00,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:39:00,830 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 [2022-07-12 18:39:02,849 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (= |c_~#list~0.base| |c_ULTIMATE.start_l0_insert_~list#1.base|)) (.cse1 (= |c_~#list~0.offset| |c_ULTIMATE.start_l0_insert_~list#1.offset|))) (or (and (= (select |c_#valid| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_l0_insert_~list#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_l0_insert_~list#1.base|) |c_ULTIMATE.start_l0_insert_~list#1.offset| |c_ULTIMATE.start_l0_insert_~item~4#1.base|)))) (select .cse0 (select (select .cse0 |c_~#list~0.base|) |c_~#list~0.offset|))) (+ |c_ULTIMATE.start_l0_insert_~item~4#1.offset| 4))) 1) .cse1 .cse2) (and (or (not .cse2) (not .cse1)) (forall ((v_arrayElimCell_205 Int)) (= (select |c_#valid| (select (let ((.cse3 (store |c_#memory_$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|))) (+ v_arrayElimCell_205 4))) 1))))) is different from false [2022-07-12 18:39:04,893 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_arrayElimCell_205 Int) (v_ArrVal_12860 Int)) (= 1 (select |c_#valid| (select (let ((.cse9 (let ((.cse10 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_l0_insert_~item~4#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_l0_insert_~item~4#1.base|) |c_ULTIMATE.start_l0_insert_~item~4#1.offset| v_ArrVal_12860)))) (store .cse10 |c_ULTIMATE.start_l0_insert_~list#1.base| (store (select .cse10 |c_ULTIMATE.start_l0_insert_~list#1.base|) |c_ULTIMATE.start_l0_insert_~list#1.offset| |c_ULTIMATE.start_l0_insert_~item~4#1.base|))))) (select .cse9 (select (select .cse9 |c_~#list~0.base|) |c_~#list~0.offset|))) (+ v_arrayElimCell_205 4)))))) (.cse1 (= |c_~#list~0.base| |c_ULTIMATE.start_l0_insert_~list#1.base|)) (.cse2 (= |c_~#list~0.offset| |c_ULTIMATE.start_l0_insert_~list#1.offset|))) (and (or .cse0 .cse1) (or .cse0 .cse2) (or (not .cse1) (forall ((v_ArrVal_12860 Int)) (= (select |c_#valid| (select (let ((.cse3 (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_l0_insert_~item~4#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_l0_insert_~item~4#1.base|) |c_ULTIMATE.start_l0_insert_~item~4#1.offset| v_ArrVal_12860)))) (store .cse4 |c_ULTIMATE.start_l0_insert_~list#1.base| (store (select .cse4 |c_ULTIMATE.start_l0_insert_~list#1.base|) |c_ULTIMATE.start_l0_insert_~list#1.offset| |c_ULTIMATE.start_l0_insert_~item~4#1.base|))))) (select .cse3 (select (select .cse3 |c_~#list~0.base|) |c_~#list~0.offset|))) (+ |c_ULTIMATE.start_l0_insert_~item~4#1.offset| 4))) 1)) (not .cse2)) (forall ((v_ArrVal_12860 Int)) (or (forall ((v_arrayElimCell_205 Int)) (= 1 (select |c_#valid| (select (let ((.cse5 (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_l0_insert_~item~4#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_l0_insert_~item~4#1.base|) |c_ULTIMATE.start_l0_insert_~item~4#1.offset| v_ArrVal_12860)))) (store .cse6 |c_ULTIMATE.start_l0_insert_~list#1.base| (store (select .cse6 |c_ULTIMATE.start_l0_insert_~list#1.base|) |c_ULTIMATE.start_l0_insert_~list#1.offset| |c_ULTIMATE.start_l0_insert_~item~4#1.base|))))) (select .cse5 (select (select .cse5 |c_~#list~0.base|) |c_~#list~0.offset|))) (+ v_arrayElimCell_205 4))))) (= (select |c_#valid| (select (let ((.cse7 (let ((.cse8 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_l0_insert_~item~4#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_l0_insert_~item~4#1.base|) |c_ULTIMATE.start_l0_insert_~item~4#1.offset| v_ArrVal_12860)))) (store .cse8 |c_ULTIMATE.start_l0_insert_~list#1.base| (store (select .cse8 |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 .cse7 (select (select .cse7 |c_~#list~0.base|) |c_~#list~0.offset|))) (+ |c_ULTIMATE.start_l0_insert_~item~4#1.offset| 4))) 1))))) is different from false [2022-07-12 18:39:05,321 INFO L356 Elim1Store]: treesize reduction 196, result has 54.3 percent of original size [2022-07-12 18:39:05,322 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 55851 treesize of output 53799