./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array27_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/AutomizerReach.xml -i ../sv-benchmarks/c/array-patterns/array27_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8e2a4cc1bd1815c470836bbbcc9d3775eac69b651b7231d974ae63a065851dd1 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 21:42:03,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 21:42:03,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 21:42:03,475 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 21:42:03,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 21:42:03,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 21:42:03,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 21:42:03,494 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 21:42:03,495 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 21:42:03,496 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 21:42:03,496 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 21:42:03,497 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 21:42:03,497 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 21:42:03,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 21:42:03,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 21:42:03,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 21:42:03,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 21:42:03,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 21:42:03,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 21:42:03,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 21:42:03,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 21:42:03,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 21:42:03,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 21:42:03,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 21:42:03,527 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 21:42:03,527 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 21:42:03,527 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 21:42:03,528 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 21:42:03,528 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 21:42:03,529 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 21:42:03,529 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 21:42:03,530 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 21:42:03,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 21:42:03,531 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 21:42:03,531 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 21:42:03,532 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 21:42:03,532 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 21:42:03,532 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 21:42:03,533 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 21:42:03,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 21:42:03,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 21:42:03,534 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 21:42:03,552 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 21:42:03,552 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 21:42:03,553 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 21:42:03,553 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 21:42:03,554 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 21:42:03,554 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 21:42:03,555 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 21:42:03,555 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 21:42:03,555 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 21:42:03,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 21:42:03,556 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 21:42:03,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 21:42:03,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 21:42:03,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 21:42:03,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 21:42:03,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 21:42:03,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 21:42:03,557 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 21:42:03,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 21:42:03,557 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 21:42:03,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 21:42:03,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 21:42:03,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 21:42:03,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 21:42:03,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:42:03,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 21:42:03,559 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 21:42:03,559 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 21:42:03,559 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 21:42:03,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 21:42:03,559 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 21:42:03,559 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 21:42:03,560 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 21:42:03,560 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e2a4cc1bd1815c470836bbbcc9d3775eac69b651b7231d974ae63a065851dd1 [2021-12-27 21:42:03,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 21:42:03,816 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 21:42:03,818 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 21:42:03,819 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 21:42:03,819 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 21:42:03,820 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array27_pattern.c [2021-12-27 21:42:03,859 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dbf63bdf/6184ab527f5549efae9b1ecd67d9a5ce/FLAG6ed4fa812 [2021-12-27 21:42:04,230 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 21:42:04,231 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array27_pattern.c [2021-12-27 21:42:04,235 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dbf63bdf/6184ab527f5549efae9b1ecd67d9a5ce/FLAG6ed4fa812 [2021-12-27 21:42:04,246 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dbf63bdf/6184ab527f5549efae9b1ecd67d9a5ce [2021-12-27 21:42:04,248 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 21:42:04,250 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 21:42:04,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 21:42:04,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 21:42:04,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 21:42:04,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:42:04" (1/1) ... [2021-12-27 21:42:04,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@155c83d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:04, skipping insertion in model container [2021-12-27 21:42:04,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:42:04" (1/1) ... [2021-12-27 21:42:04,259 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 21:42:04,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 21:42:04,390 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array27_pattern.c[1253,1266] [2021-12-27 21:42:04,407 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:42:04,412 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 21:42:04,421 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array27_pattern.c[1253,1266] [2021-12-27 21:42:04,435 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:42:04,478 INFO L208 MainTranslator]: Completed translation [2021-12-27 21:42:04,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:04 WrapperNode [2021-12-27 21:42:04,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 21:42:04,479 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 21:42:04,479 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 21:42:04,480 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 21:42:04,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:04" (1/1) ... [2021-12-27 21:42:04,495 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:04" (1/1) ... [2021-12-27 21:42:04,511 INFO L137 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2021-12-27 21:42:04,511 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 21:42:04,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 21:42:04,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 21:42:04,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 21:42:04,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:04" (1/1) ... [2021-12-27 21:42:04,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:04" (1/1) ... [2021-12-27 21:42:04,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:04" (1/1) ... [2021-12-27 21:42:04,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:04" (1/1) ... [2021-12-27 21:42:04,530 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:04" (1/1) ... [2021-12-27 21:42:04,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:04" (1/1) ... [2021-12-27 21:42:04,539 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:04" (1/1) ... [2021-12-27 21:42:04,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 21:42:04,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 21:42:04,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 21:42:04,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 21:42:04,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:04" (1/1) ... [2021-12-27 21:42:04,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:42:04,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:04,567 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) [2021-12-27 21:42:04,570 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 [2021-12-27 21:42:04,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 21:42:04,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 21:42:04,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-27 21:42:04,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-27 21:42:04,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 21:42:04,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 21:42:04,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-27 21:42:04,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-27 21:42:04,671 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 21:42:04,672 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 21:42:04,823 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 21:42:04,827 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 21:42:04,827 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-27 21:42:04,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:42:04 BoogieIcfgContainer [2021-12-27 21:42:04,840 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 21:42:04,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 21:42:04,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 21:42:04,843 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 21:42:04,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 09:42:04" (1/3) ... [2021-12-27 21:42:04,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c4ea6e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:42:04, skipping insertion in model container [2021-12-27 21:42:04,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:04" (2/3) ... [2021-12-27 21:42:04,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c4ea6e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:42:04, skipping insertion in model container [2021-12-27 21:42:04,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:42:04" (3/3) ... [2021-12-27 21:42:04,844 INFO L111 eAbstractionObserver]: Analyzing ICFG array27_pattern.c [2021-12-27 21:42:04,847 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 21:42:04,847 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 21:42:04,894 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 21:42:04,920 INFO L339 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-27 21:42:04,920 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 21:42:04,932 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:42:04,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-27 21:42:04,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:04,936 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:42:04,937 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:04,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:04,941 INFO L85 PathProgramCache]: Analyzing trace with hash -468356531, now seen corresponding path program 1 times [2021-12-27 21:42:04,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:04,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307105789] [2021-12-27 21:42:04,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:04,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:05,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:42:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:42:05,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:05,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307105789] [2021-12-27 21:42:05,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307105789] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:42:05,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:42:05,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 21:42:05,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228946277] [2021-12-27 21:42:05,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:42:05,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-27 21:42:05,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:05,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-27 21:42:05,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-27 21:42:05,093 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:42:05,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:05,104 INFO L93 Difference]: Finished difference Result 41 states and 60 transitions. [2021-12-27 21:42:05,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-27 21:42:05,106 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-27 21:42:05,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:05,110 INFO L225 Difference]: With dead ends: 41 [2021-12-27 21:42:05,110 INFO L226 Difference]: Without dead ends: 18 [2021-12-27 21:42:05,113 INFO L932 BasicCegarLoop]: 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 [2021-12-27 21:42:05,116 INFO L933 BasicCegarLoop]: 26 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, 26 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 [2021-12-27 21:42:05,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:42:05,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-27 21:42:05,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-27 21:42:05,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:42:05,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-12-27 21:42:05,138 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2021-12-27 21:42:05,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:05,138 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-12-27 21:42:05,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:42:05,139 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-12-27 21:42:05,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-27 21:42:05,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:05,140 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:42:05,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-27 21:42:05,140 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:05,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:05,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1936709868, now seen corresponding path program 1 times [2021-12-27 21:42:05,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:05,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194440361] [2021-12-27 21:42:05,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:05,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:05,163 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:05,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1528492019] [2021-12-27 21:42:05,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:05,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:05,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:05,184 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) [2021-12-27 21:42:05,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-27 21:42:05,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:42:05,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-27 21:42:05,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:05,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:42:05,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:42:05,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:05,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194440361] [2021-12-27 21:42:05,374 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:05,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528492019] [2021-12-27 21:42:05,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528492019] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:42:05,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:42:05,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-27 21:42:05,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994430538] [2021-12-27 21:42:05,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:42:05,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-27 21:42:05,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:05,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-27 21:42:05,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:42:05,381 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:42:05,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:05,464 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2021-12-27 21:42:05,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-27 21:42:05,465 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-27 21:42:05,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:05,467 INFO L225 Difference]: With dead ends: 36 [2021-12-27 21:42:05,467 INFO L226 Difference]: Without dead ends: 27 [2021-12-27 21:42:05,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-27 21:42:05,469 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 58 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:42:05,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 11 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:42:05,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-27 21:42:05,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2021-12-27 21:42:05,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 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) [2021-12-27 21:42:05,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-12-27 21:42:05,476 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 10 [2021-12-27 21:42:05,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:05,479 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-12-27 21:42:05,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:42:05,480 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-12-27 21:42:05,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-27 21:42:05,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:05,480 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:42:05,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-27 21:42:05,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:05,697 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:05,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:05,699 INFO L85 PathProgramCache]: Analyzing trace with hash 129650620, now seen corresponding path program 1 times [2021-12-27 21:42:05,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:05,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866989664] [2021-12-27 21:42:05,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:05,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:05,717 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:05,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516979718] [2021-12-27 21:42:05,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:05,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:05,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:05,727 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) [2021-12-27 21:42:05,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-27 21:42:05,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:42:05,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-27 21:42:05,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:05,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 21:42:05,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:42:05,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:05,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866989664] [2021-12-27 21:42:05,793 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:05,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516979718] [2021-12-27 21:42:05,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516979718] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:42:05,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:42:05,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-27 21:42:05,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198255596] [2021-12-27 21:42:05,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:42:05,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 21:42:05,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:05,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 21:42:05,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-27 21:42:05,795 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:42:05,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:05,832 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-12-27 21:42:05,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 21:42:05,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-27 21:42:05,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:05,833 INFO L225 Difference]: With dead ends: 40 [2021-12-27 21:42:05,833 INFO L226 Difference]: Without dead ends: 25 [2021-12-27 21:42:05,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:42:05,834 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:42:05,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 16 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:42:05,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-27 21:42:05,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-12-27 21:42:05,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 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) [2021-12-27 21:42:05,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-12-27 21:42:05,839 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 16 [2021-12-27 21:42:05,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:05,839 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-12-27 21:42:05,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:42:05,839 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-12-27 21:42:05,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-27 21:42:05,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:05,840 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:42:05,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-27 21:42:06,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-27 21:42:06,067 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:06,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:06,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1705469543, now seen corresponding path program 1 times [2021-12-27 21:42:06,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:06,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536215628] [2021-12-27 21:42:06,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:06,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:06,076 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:06,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157674391] [2021-12-27 21:42:06,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:06,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:06,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:06,077 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) [2021-12-27 21:42:06,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-27 21:42:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:42:06,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-27 21:42:06,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:06,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 32 [2021-12-27 21:42:06,234 INFO L387 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 [2021-12-27 21:42:06,241 INFO L387 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 [2021-12-27 21:42:06,387 INFO L387 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 36 treesize of output 24 [2021-12-27 21:42:06,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:42:06,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:42:11,390 INFO L387 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 56 treesize of output 52 [2021-12-27 21:42:11,403 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 21:42:11,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 59 [2021-12-27 21:42:11,415 INFO L387 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 19 treesize of output 4 [2021-12-27 21:42:11,449 INFO L387 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 17 treesize of output 4 [2021-12-27 21:42:12,192 INFO L353 Elim1Store]: treesize reduction 46, result has 37.0 percent of original size [2021-12-27 21:42:12,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 68 [2021-12-27 21:42:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:42:12,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:12,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536215628] [2021-12-27 21:42:12,414 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:12,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157674391] [2021-12-27 21:42:12,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157674391] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:42:12,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:42:12,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-12-27 21:42:12,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814158264] [2021-12-27 21:42:12,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:42:12,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-27 21:42:12,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:12,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-27 21:42:12,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=263, Unknown=1, NotChecked=0, Total=342 [2021-12-27 21:42:12,417 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 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) [2021-12-27 21:42:13,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:13,637 INFO L93 Difference]: Finished difference Result 87 states and 109 transitions. [2021-12-27 21:42:13,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-27 21:42:13,638 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-27 21:42:13,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:13,640 INFO L225 Difference]: With dead ends: 87 [2021-12-27 21:42:13,640 INFO L226 Difference]: Without dead ends: 81 [2021-12-27 21:42:13,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=260, Invalid=929, Unknown=1, NotChecked=0, Total=1190 [2021-12-27 21:42:13,641 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 121 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-27 21:42:13,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 59 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 274 Invalid, 0 Unknown, 65 Unchecked, 0.7s Time] [2021-12-27 21:42:13,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-27 21:42:13,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 50. [2021-12-27 21:42:13,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.346938775510204) internal successors, (66), 49 states have internal predecessors, (66), 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) [2021-12-27 21:42:13,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2021-12-27 21:42:13,652 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 21 [2021-12-27 21:42:13,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:13,652 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2021-12-27 21:42:13,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 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) [2021-12-27 21:42:13,655 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2021-12-27 21:42:13,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-27 21:42:13,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:13,656 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:42:13,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-27 21:42:13,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:13,865 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:13,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:13,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1881533531, now seen corresponding path program 2 times [2021-12-27 21:42:13,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:13,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271752025] [2021-12-27 21:42:13,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:13,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:13,872 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:13,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859280094] [2021-12-27 21:42:13,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:42:13,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:13,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:13,874 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) [2021-12-27 21:42:13,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-27 21:42:13,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:42:13,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:42:13,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-27 21:42:13,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:42:14,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:42:14,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:42:14,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:14,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271752025] [2021-12-27 21:42:14,096 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:14,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859280094] [2021-12-27 21:42:14,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859280094] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:42:14,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:42:14,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-27 21:42:14,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448236788] [2021-12-27 21:42:14,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:42:14,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-27 21:42:14,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:14,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-27 21:42:14,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-27 21:42:14,097 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 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) [2021-12-27 21:42:14,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:14,290 INFO L93 Difference]: Finished difference Result 120 states and 155 transitions. [2021-12-27 21:42:14,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-27 21:42:14,291 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 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 23 [2021-12-27 21:42:14,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:14,292 INFO L225 Difference]: With dead ends: 120 [2021-12-27 21:42:14,292 INFO L226 Difference]: Without dead ends: 83 [2021-12-27 21:42:14,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-27 21:42:14,292 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 94 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:42:14,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 44 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:42:14,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-27 21:42:14,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2021-12-27 21:42:14,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.2881355932203389) internal successors, (76), 59 states have internal predecessors, (76), 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) [2021-12-27 21:42:14,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2021-12-27 21:42:14,306 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 23 [2021-12-27 21:42:14,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:14,306 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2021-12-27 21:42:14,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 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) [2021-12-27 21:42:14,307 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2021-12-27 21:42:14,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-27 21:42:14,308 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:14,309 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:42:14,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-27 21:42:14,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:14,514 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:14,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:14,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1532144674, now seen corresponding path program 3 times [2021-12-27 21:42:14,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:14,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489390409] [2021-12-27 21:42:14,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:14,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:14,522 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:14,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223799722] [2021-12-27 21:42:14,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-27 21:42:14,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:14,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:14,538 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) [2021-12-27 21:42:14,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-27 21:42:14,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-27 21:42:14,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:42:14,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-27 21:42:14,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:14,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 32 [2021-12-27 21:42:14,728 INFO L387 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 [2021-12-27 21:42:14,736 INFO L387 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 [2021-12-27 21:42:14,836 INFO L353 Elim1Store]: treesize reduction 54, result has 11.5 percent of original size [2021-12-27 21:42:14,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 30 [2021-12-27 21:42:14,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-27 21:42:14,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:42:15,196 INFO L387 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 56 treesize of output 52 [2021-12-27 21:42:15,208 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 21:42:15,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 59 [2021-12-27 21:42:15,223 INFO L387 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 19 treesize of output 4 [2021-12-27 21:42:15,249 INFO L387 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 17 treesize of output 4 [2021-12-27 21:42:16,096 INFO L353 Elim1Store]: treesize reduction 38, result has 47.9 percent of original size [2021-12-27 21:42:16,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 76 [2021-12-27 21:42:18,262 WARN L838 $PredicateComparison]: unable to prove that (forall ((~ARR_SIZE~0 Int)) (or (< 1 ~ARR_SIZE~0) (not (< |c_ULTIMATE.start_main_~row~0#1| ~ARR_SIZE~0)) (and (= (+ (* ~ARR_SIZE~0 ~ARR_SIZE~0 ~ARR_SIZE~0) ~ARR_SIZE~0) (+ (* |c_ULTIMATE.start_main_~sum~0#1| 2) (* 2 (* ~ARR_SIZE~0 ~ARR_SIZE~0)))) (= (* 17179869180 |c_ULTIMATE.start_main_~row~0#1|) (* (* |c_ULTIMATE.start_main_~row~0#1| (mod ~ARR_SIZE~0 4294967296)) 4))))) is different from false [2021-12-27 21:42:18,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 1 not checked. [2021-12-27 21:42:18,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:18,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489390409] [2021-12-27 21:42:18,278 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:18,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223799722] [2021-12-27 21:42:18,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223799722] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:42:18,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:42:18,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-12-27 21:42:18,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522404988] [2021-12-27 21:42:18,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:42:18,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-27 21:42:18,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:18,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-27 21:42:18,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=209, Unknown=1, NotChecked=30, Total=306 [2021-12-27 21:42:18,281 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:42:19,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:19,130 INFO L93 Difference]: Finished difference Result 184 states and 232 transitions. [2021-12-27 21:42:19,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-27 21:42:19,131 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-27 21:42:19,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:19,132 INFO L225 Difference]: With dead ends: 184 [2021-12-27 21:42:19,132 INFO L226 Difference]: Without dead ends: 178 [2021-12-27 21:42:19,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=241, Invalid=692, Unknown=1, NotChecked=58, Total=992 [2021-12-27 21:42:19,133 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 83 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-27 21:42:19,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 75 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 323 Invalid, 0 Unknown, 42 Unchecked, 0.4s Time] [2021-12-27 21:42:19,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-12-27 21:42:19,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 101. [2021-12-27 21:42:19,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.32) internal successors, (132), 100 states have internal predecessors, (132), 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) [2021-12-27 21:42:19,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 132 transitions. [2021-12-27 21:42:19,158 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 132 transitions. Word has length 24 [2021-12-27 21:42:19,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:19,158 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 132 transitions. [2021-12-27 21:42:19,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:42:19,158 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 132 transitions. [2021-12-27 21:42:19,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-27 21:42:19,162 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:19,162 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:42:19,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-27 21:42:19,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:19,366 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:19,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:19,367 INFO L85 PathProgramCache]: Analyzing trace with hash -511185762, now seen corresponding path program 1 times [2021-12-27 21:42:19,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:19,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800433727] [2021-12-27 21:42:19,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:19,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:19,378 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:19,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1540265450] [2021-12-27 21:42:19,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:19,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:19,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:19,379 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) [2021-12-27 21:42:19,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-27 21:42:19,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:42:19,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-27 21:42:19,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-27 21:42:19,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:42:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-27 21:42:19,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:19,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800433727] [2021-12-27 21:42:19,556 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:19,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540265450] [2021-12-27 21:42:19,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540265450] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:42:19,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:42:19,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-12-27 21:42:19,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599942914] [2021-12-27 21:42:19,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:42:19,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-27 21:42:19,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:19,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-27 21:42:19,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-27 21:42:19,558 INFO L87 Difference]: Start difference. First operand 101 states and 132 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 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) [2021-12-27 21:42:19,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:19,740 INFO L93 Difference]: Finished difference Result 216 states and 284 transitions. [2021-12-27 21:42:19,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-27 21:42:19,740 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 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 24 [2021-12-27 21:42:19,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:19,741 INFO L225 Difference]: With dead ends: 216 [2021-12-27 21:42:19,741 INFO L226 Difference]: Without dead ends: 144 [2021-12-27 21:42:19,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2021-12-27 21:42:19,742 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 64 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:42:19,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 30 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:42:19,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-27 21:42:19,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 99. [2021-12-27 21:42:19,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.2857142857142858) internal successors, (126), 98 states have internal predecessors, (126), 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) [2021-12-27 21:42:19,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2021-12-27 21:42:19,762 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 24 [2021-12-27 21:42:19,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:19,762 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2021-12-27 21:42:19,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 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) [2021-12-27 21:42:19,763 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2021-12-27 21:42:19,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-27 21:42:19,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:19,763 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:42:19,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-27 21:42:19,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:19,979 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:19,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:19,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1060244373, now seen corresponding path program 2 times [2021-12-27 21:42:19,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:19,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645986227] [2021-12-27 21:42:19,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:19,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:19,986 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:19,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [4173371] [2021-12-27 21:42:19,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:42:19,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:19,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:19,987 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) [2021-12-27 21:42:19,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-27 21:42:20,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:42:20,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:42:20,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-27 21:42:20,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:20,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-27 21:42:20,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:42:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-27 21:42:20,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:20,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645986227] [2021-12-27 21:42:20,183 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:20,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4173371] [2021-12-27 21:42:20,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4173371] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:42:20,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:42:20,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-27 21:42:20,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898126495] [2021-12-27 21:42:20,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:42:20,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-27 21:42:20,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:20,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-27 21:42:20,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-27 21:42:20,184 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 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) [2021-12-27 21:42:20,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:20,302 INFO L93 Difference]: Finished difference Result 137 states and 164 transitions. [2021-12-27 21:42:20,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-27 21:42:20,303 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 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 26 [2021-12-27 21:42:20,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:20,303 INFO L225 Difference]: With dead ends: 137 [2021-12-27 21:42:20,303 INFO L226 Difference]: Without dead ends: 101 [2021-12-27 21:42:20,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-12-27 21:42:20,304 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 50 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:42:20,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 36 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:42:20,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-27 21:42:20,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 84. [2021-12-27 21:42:20,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.2650602409638554) internal successors, (105), 83 states have internal predecessors, (105), 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) [2021-12-27 21:42:20,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2021-12-27 21:42:20,314 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 26 [2021-12-27 21:42:20,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:20,314 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2021-12-27 21:42:20,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 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) [2021-12-27 21:42:20,314 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2021-12-27 21:42:20,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-27 21:42:20,315 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:20,315 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:42:20,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-27 21:42:20,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:20,519 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:20,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:20,520 INFO L85 PathProgramCache]: Analyzing trace with hash -956437022, now seen corresponding path program 1 times [2021-12-27 21:42:20,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:20,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163848233] [2021-12-27 21:42:20,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:20,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:20,526 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:20,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264850389] [2021-12-27 21:42:20,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:20,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:20,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:20,528 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) [2021-12-27 21:42:20,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-27 21:42:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:42:20,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-27 21:42:20,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-27 21:42:20,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:42:20,707 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-27 21:42:20,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:20,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163848233] [2021-12-27 21:42:20,708 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:20,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264850389] [2021-12-27 21:42:20,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264850389] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:42:20,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:42:20,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-12-27 21:42:20,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808634361] [2021-12-27 21:42:20,709 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:42:20,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-27 21:42:20,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:20,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-27 21:42:20,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-27 21:42:20,710 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 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) [2021-12-27 21:42:20,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:20,863 INFO L93 Difference]: Finished difference Result 153 states and 189 transitions. [2021-12-27 21:42:20,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-27 21:42:20,864 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 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 27 [2021-12-27 21:42:20,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:20,864 INFO L225 Difference]: With dead ends: 153 [2021-12-27 21:42:20,864 INFO L226 Difference]: Without dead ends: 87 [2021-12-27 21:42:20,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-12-27 21:42:20,865 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 75 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:42:20,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 20 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:42:20,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-27 21:42:20,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 67. [2021-12-27 21:42:20,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2424242424242424) internal successors, (82), 66 states have internal predecessors, (82), 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) [2021-12-27 21:42:20,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2021-12-27 21:42:20,874 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 27 [2021-12-27 21:42:20,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:20,875 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2021-12-27 21:42:20,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 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) [2021-12-27 21:42:20,875 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2021-12-27 21:42:20,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-27 21:42:20,875 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:20,876 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:42:20,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-27 21:42:21,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-27 21:42:21,092 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:21,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:21,093 INFO L85 PathProgramCache]: Analyzing trace with hash -14420759, now seen corresponding path program 2 times [2021-12-27 21:42:21,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:21,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994603940] [2021-12-27 21:42:21,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:21,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:21,107 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:21,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376399809] [2021-12-27 21:42:21,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:42:21,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:21,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:21,111 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) [2021-12-27 21:42:21,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-27 21:42:21,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:42:21,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:42:21,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-27 21:42:21,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:21,227 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-27 21:42:21,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:42:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-27 21:42:21,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:21,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994603940] [2021-12-27 21:42:21,267 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:21,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376399809] [2021-12-27 21:42:21,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376399809] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:42:21,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:42:21,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-27 21:42:21,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575445901] [2021-12-27 21:42:21,267 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:42:21,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-27 21:42:21,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:21,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-27 21:42:21,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-27 21:42:21,268 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 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) [2021-12-27 21:42:21,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:21,334 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2021-12-27 21:42:21,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-27 21:42:21,334 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 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 30 [2021-12-27 21:42:21,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:21,335 INFO L225 Difference]: With dead ends: 80 [2021-12-27 21:42:21,335 INFO L226 Difference]: Without dead ends: 67 [2021-12-27 21:42:21,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-12-27 21:42:21,336 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 48 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:42:21,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 27 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:42:21,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-27 21:42:21,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 47. [2021-12-27 21:42:21,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 states have internal predecessors, (56), 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) [2021-12-27 21:42:21,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-12-27 21:42:21,341 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 30 [2021-12-27 21:42:21,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:21,341 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-12-27 21:42:21,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 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) [2021-12-27 21:42:21,342 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-12-27 21:42:21,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-27 21:42:21,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:21,342 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:42:21,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-27 21:42:21,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-27 21:42:21,559 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:21,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:21,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1156561688, now seen corresponding path program 3 times [2021-12-27 21:42:21,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:21,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737933860] [2021-12-27 21:42:21,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:21,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:21,572 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:21,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189194787] [2021-12-27 21:42:21,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-27 21:42:21,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:21,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:21,574 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) [2021-12-27 21:42:21,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-27 21:42:21,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-27 21:42:21,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:42:21,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-27 21:42:21,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:21,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 61 treesize of output 56 [2021-12-27 21:42:21,777 INFO L387 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 19 treesize of output 18 [2021-12-27 21:42:21,783 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-27 21:42:21,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 48 treesize of output 41 [2021-12-27 21:42:21,859 INFO L353 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2021-12-27 21:42:21,860 INFO L387 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2021-12-27 21:42:21,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 77 treesize of output 68 [2021-12-27 21:42:22,008 INFO L353 Elim1Store]: treesize reduction 160, result has 19.6 percent of original size [2021-12-27 21:42:22,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 67 treesize of output 103 [2021-12-27 21:42:22,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,032 INFO L353 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2021-12-27 21:42:22,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 12 [2021-12-27 21:42:22,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 92 treesize of output 81 [2021-12-27 21:42:22,323 INFO L353 Elim1Store]: treesize reduction 332, result has 13.3 percent of original size [2021-12-27 21:42:22,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 80 treesize of output 118 [2021-12-27 21:42:22,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 37 [2021-12-27 21:42:23,140 INFO L353 Elim1Store]: treesize reduction 332, result has 30.1 percent of original size [2021-12-27 21:42:23,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 132 treesize of output 179 [2021-12-27 21:42:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:42:23,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:42:30,983 INFO L387 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 56 treesize of output 52 [2021-12-27 21:42:31,019 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 21:42:31,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 59 [2021-12-27 21:42:31,042 INFO L387 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 19 treesize of output 4 [2021-12-27 21:42:31,439 INFO L353 Elim1Store]: treesize reduction 163, result has 22.0 percent of original size [2021-12-27 21:42:31,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 299906451 treesize of output 284702131