./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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-multidimensional/init-non-constant-2-n-u.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 4fa401c700a21fa1f98a1481c8e8ba1555a45c0429555dc041a1c04ce1059991 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 10:04:00,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 10:04:00,466 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 10:04:00,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 10:04:00,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 10:04:00,496 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 10:04:00,497 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 10:04:00,509 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 10:04:00,511 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 10:04:00,512 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 10:04:00,513 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 10:04:00,514 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 10:04:00,515 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 10:04:00,517 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 10:04:00,518 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 10:04:00,519 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 10:04:00,520 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 10:04:00,523 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 10:04:00,524 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 10:04:00,527 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 10:04:00,529 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 10:04:00,530 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 10:04:00,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 10:04:00,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 10:04:00,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 10:04:00,536 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 10:04:00,536 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 10:04:00,537 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 10:04:00,537 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 10:04:00,538 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 10:04:00,538 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 10:04:00,539 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 10:04:00,540 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 10:04:00,540 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 10:04:00,541 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 10:04:00,542 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 10:04:00,542 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 10:04:00,543 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 10:04:00,543 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 10:04:00,543 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 10:04:00,545 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 10:04:00,545 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 10:04:00,559 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 10:04:00,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 10:04:00,563 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 10:04:00,563 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 10:04:00,563 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 10:04:00,564 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 10:04:00,564 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 10:04:00,564 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 10:04:00,564 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 10:04:00,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 10:04:00,565 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 10:04:00,565 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 10:04:00,565 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 10:04:00,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 10:04:00,566 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 10:04:00,566 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 10:04:00,566 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 10:04:00,566 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 10:04:00,566 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 10:04:00,566 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 10:04:00,567 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 10:04:00,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 10:04:00,567 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 10:04:00,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 10:04:00,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:04:00,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 10:04:00,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 10:04:00,568 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 10:04:00,568 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 10:04:00,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 10:04:00,568 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 10:04:00,568 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 10:04:00,569 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 10:04:00,569 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 10:04:00,569 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fa401c700a21fa1f98a1481c8e8ba1555a45c0429555dc041a1c04ce1059991 [2021-12-21 10:04:00,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 10:04:00,779 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 10:04:00,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 10:04:00,781 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 10:04:00,781 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 10:04:00,782 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c [2021-12-21 10:04:00,841 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbaf99923/b344ea885be74b85b6225936e8ed2269/FLAG5c16c617b [2021-12-21 10:04:01,159 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 10:04:01,159 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c [2021-12-21 10:04:01,163 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbaf99923/b344ea885be74b85b6225936e8ed2269/FLAG5c16c617b [2021-12-21 10:04:01,175 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbaf99923/b344ea885be74b85b6225936e8ed2269 [2021-12-21 10:04:01,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 10:04:01,178 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 10:04:01,180 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 10:04:01,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 10:04:01,182 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 10:04:01,183 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:04:01" (1/1) ... [2021-12-21 10:04:01,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7369e03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:04:01, skipping insertion in model container [2021-12-21 10:04:01,184 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:04:01" (1/1) ... [2021-12-21 10:04:01,189 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 10:04:01,200 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 10:04:01,321 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-multidimensional/init-non-constant-2-n-u.c[421,434] [2021-12-21 10:04:01,335 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:04:01,340 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 10:04:01,348 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-multidimensional/init-non-constant-2-n-u.c[421,434] [2021-12-21 10:04:01,353 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:04:01,362 INFO L208 MainTranslator]: Completed translation [2021-12-21 10:04:01,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:04:01 WrapperNode [2021-12-21 10:04:01,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 10:04:01,363 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 10:04:01,363 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 10:04:01,363 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 10:04:01,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:04:01" (1/1) ... [2021-12-21 10:04:01,372 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:04:01" (1/1) ... [2021-12-21 10:04:01,383 INFO L137 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 69 [2021-12-21 10:04:01,384 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 10:04:01,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 10:04:01,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 10:04:01,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 10:04:01,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:04:01" (1/1) ... [2021-12-21 10:04:01,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:04:01" (1/1) ... [2021-12-21 10:04:01,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:04:01" (1/1) ... [2021-12-21 10:04:01,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:04:01" (1/1) ... [2021-12-21 10:04:01,394 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:04:01" (1/1) ... [2021-12-21 10:04:01,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:04:01" (1/1) ... [2021-12-21 10:04:01,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:04:01" (1/1) ... [2021-12-21 10:04:01,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 10:04:01,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 10:04:01,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 10:04:01,399 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 10:04:01,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:04:01" (1/1) ... [2021-12-21 10:04:01,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:04:01,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:04:01,423 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) [2021-12-21 10:04:01,440 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 [2021-12-21 10:04:01,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 10:04:01,459 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 10:04:01,459 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 10:04:01,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 10:04:01,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 10:04:01,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 10:04:01,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 10:04:01,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 10:04:01,460 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 10:04:01,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 10:04:01,510 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 10:04:01,511 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 10:04:01,638 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 10:04:01,642 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 10:04:01,643 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-21 10:04:01,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:04:01 BoogieIcfgContainer [2021-12-21 10:04:01,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 10:04:01,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 10:04:01,658 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 10:04:01,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 10:04:01,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:04:01" (1/3) ... [2021-12-21 10:04:01,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e381527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:04:01, skipping insertion in model container [2021-12-21 10:04:01,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:04:01" (2/3) ... [2021-12-21 10:04:01,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e381527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:04:01, skipping insertion in model container [2021-12-21 10:04:01,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:04:01" (3/3) ... [2021-12-21 10:04:01,662 INFO L111 eAbstractionObserver]: Analyzing ICFG init-non-constant-2-n-u.c [2021-12-21 10:04:01,668 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 10:04:01,669 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 10:04:01,713 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 10:04:01,717 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 [2021-12-21 10:04:01,717 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 10:04:01,727 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 20 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:04:01,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 10:04:01,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:04:01,731 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:04:01,732 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:04:01,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:04:01,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1178325179, now seen corresponding path program 1 times [2021-12-21 10:04:01,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:04:01,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737169249] [2021-12-21 10:04:01,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:04:01,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:04:01,816 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:04:01,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87501276] [2021-12-21 10:04:01,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:04:01,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:04:01,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:04:01,820 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) [2021-12-21 10:04:01,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 10:04:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:04:01,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-21 10:04:01,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:04:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 10:04:01,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:04:01,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:04:01,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737169249] [2021-12-21 10:04:01,950 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:04:01,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87501276] [2021-12-21 10:04:01,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87501276] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:04:01,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:04:01,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:04:01,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040915062] [2021-12-21 10:04:01,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:04:01,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 10:04:01,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:04:01,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 10:04:01,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 10:04:01,990 INFO L87 Difference]: Start difference. First operand has 23 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 20 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:04:02,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:04:02,004 INFO L93 Difference]: Finished difference Result 43 states and 64 transitions. [2021-12-21 10:04:02,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 10:04:02,006 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-12-21 10:04:02,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:04:02,012 INFO L225 Difference]: With dead ends: 43 [2021-12-21 10:04:02,013 INFO L226 Difference]: Without dead ends: 19 [2021-12-21 10:04:02,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 10:04:02,018 INFO L933 BasicCegarLoop]: 27 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, 27 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 [2021-12-21 10:04:02,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:04:02,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-21 10:04:02,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-12-21 10:04:02,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:04:02,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-12-21 10:04:02,053 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 18 [2021-12-21 10:04:02,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:04:02,054 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-12-21 10:04:02,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:04:02,054 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-12-21 10:04:02,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 10:04:02,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:04:02,056 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:04:02,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 10:04:02,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-21 10:04:02,273 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:04:02,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:04:02,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1509384059, now seen corresponding path program 1 times [2021-12-21 10:04:02,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:04:02,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051103325] [2021-12-21 10:04:02,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:04:02,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:04:02,283 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:04:02,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [436754138] [2021-12-21 10:04:02,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:04:02,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:04:02,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:04:02,285 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) [2021-12-21 10:04:02,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 10:04:02,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:04:02,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 10:04:02,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:04:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:04:02,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:04:02,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:04:02,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051103325] [2021-12-21 10:04:02,388 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:04:02,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436754138] [2021-12-21 10:04:02,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436754138] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:04:02,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:04:02,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 10:04:02,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330352918] [2021-12-21 10:04:02,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:04:02,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 10:04:02,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:04:02,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 10:04:02,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:04:02,391 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:04:02,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:04:02,436 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2021-12-21 10:04:02,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 10:04:02,436 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-12-21 10:04:02,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:04:02,437 INFO L225 Difference]: With dead ends: 38 [2021-12-21 10:04:02,437 INFO L226 Difference]: Without dead ends: 29 [2021-12-21 10:04:02,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:04:02,438 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:04:02,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 43 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:04:02,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-21 10:04:02,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2021-12-21 10:04:02,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:04:02,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-12-21 10:04:02,452 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 18 [2021-12-21 10:04:02,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:04:02,453 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-12-21 10:04:02,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:04:02,453 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-12-21 10:04:02,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-21 10:04:02,453 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:04:02,454 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:04:02,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 10:04:02,655 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,SelfDestructingSolverStorable1 [2021-12-21 10:04:02,656 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:04:02,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:04:02,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1347743446, now seen corresponding path program 1 times [2021-12-21 10:04:02,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:04:02,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944139995] [2021-12-21 10:04:02,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:04:02,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:04:02,669 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:04:02,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702586902] [2021-12-21 10:04:02,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:04:02,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:04:02,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:04:02,672 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) [2021-12-21 10:04:02,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 10:04:02,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:04:02,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 10:04:02,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:04:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:04:02,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:04:02,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:04:02,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944139995] [2021-12-21 10:04:02,781 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:04:02,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702586902] [2021-12-21 10:04:02,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702586902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:04:02,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:04:02,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 10:04:02,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073501296] [2021-12-21 10:04:02,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:04:02,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 10:04:02,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:04:02,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 10:04:02,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:04:02,783 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:04:02,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:04:02,821 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-12-21 10:04:02,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 10:04:02,821 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-12-21 10:04:02,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:04:02,822 INFO L225 Difference]: With dead ends: 50 [2021-12-21 10:04:02,822 INFO L226 Difference]: Without dead ends: 27 [2021-12-21 10:04:02,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:04:02,823 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:04:02,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 64 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:04:02,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-21 10:04:02,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2021-12-21 10:04:02,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:04:02,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-12-21 10:04:02,827 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 21 [2021-12-21 10:04:02,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:04:02,827 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-12-21 10:04:02,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:04:02,827 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-12-21 10:04:02,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-21 10:04:02,828 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:04:02,828 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:04:02,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 10:04:03,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:04:03,043 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:04:03,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:04:03,044 INFO L85 PathProgramCache]: Analyzing trace with hash -142126156, now seen corresponding path program 1 times [2021-12-21 10:04:03,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:04:03,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929517929] [2021-12-21 10:04:03,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:04:03,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:04:03,053 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:04:03,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596680531] [2021-12-21 10:04:03,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:04:03,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:04:03,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:04:03,054 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) [2021-12-21 10:04:03,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 10:04:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:04:03,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 10:04:03,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:04:03,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 10:04:03,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:04:03,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:04:03,271 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 27 treesize of output 25 [2021-12-21 10:04:03,284 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 43 treesize of output 41 [2021-12-21 10:04:03,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:04:03,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:04:03,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929517929] [2021-12-21 10:04:03,435 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:04:03,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596680531] [2021-12-21 10:04:03,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596680531] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:04:03,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 10:04:03,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-12-21 10:04:03,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234107114] [2021-12-21 10:04:03,436 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 10:04:03,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:04:03,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:04:03,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:04:03,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:04:03,438 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:04:03,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:04:03,540 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-12-21 10:04:03,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 10:04:03,541 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-12-21 10:04:03,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:04:03,541 INFO L225 Difference]: With dead ends: 64 [2021-12-21 10:04:03,542 INFO L226 Difference]: Without dead ends: 62 [2021-12-21 10:04:03,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:04:03,542 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 74 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:04:03,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 92 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:04:03,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-21 10:04:03,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 30. [2021-12-21 10:04:03,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:04:03,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-12-21 10:04:03,547 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 22 [2021-12-21 10:04:03,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:04:03,548 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-12-21 10:04:03,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:04:03,548 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-12-21 10:04:03,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-21 10:04:03,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:04:03,548 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:04:03,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 10:04:03,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:04:03,768 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:04:03,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:04:03,768 INFO L85 PathProgramCache]: Analyzing trace with hash 762284573, now seen corresponding path program 1 times [2021-12-21 10:04:03,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:04:03,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092668546] [2021-12-21 10:04:03,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:04:03,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:04:03,775 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:04:03,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399628470] [2021-12-21 10:04:03,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:04:03,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:04:03,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:04:03,776 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) [2021-12-21 10:04:03,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 10:04:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:04:03,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 10:04:03,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:04:03,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:04:03,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:04:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:04:03,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:04:03,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092668546] [2021-12-21 10:04:03,943 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:04:03,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399628470] [2021-12-21 10:04:03,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399628470] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:04:03,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 10:04:03,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-21 10:04:03,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310686395] [2021-12-21 10:04:03,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 10:04:03,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 10:04:03,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:04:03,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 10:04:03,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:04:03,945 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:04:04,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:04:04,009 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2021-12-21 10:04:04,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 10:04:04,009 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-12-21 10:04:04,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:04:04,010 INFO L225 Difference]: With dead ends: 80 [2021-12-21 10:04:04,010 INFO L226 Difference]: Without dead ends: 67 [2021-12-21 10:04:04,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:04:04,011 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 45 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:04:04,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 97 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:04:04,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-21 10:04:04,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 52. [2021-12-21 10:04:04,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:04:04,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2021-12-21 10:04:04,018 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 25 [2021-12-21 10:04:04,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:04:04,018 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2021-12-21 10:04:04,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:04:04,018 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2021-12-21 10:04:04,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-21 10:04:04,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:04:04,019 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:04:04,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-21 10:04:04,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:04:04,236 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:04:04,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:04:04,236 INFO L85 PathProgramCache]: Analyzing trace with hash 923457379, now seen corresponding path program 2 times [2021-12-21 10:04:04,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:04:04,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877674663] [2021-12-21 10:04:04,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:04:04,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:04:04,243 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:04:04,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119539744] [2021-12-21 10:04:04,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 10:04:04,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:04:04,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:04:04,244 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) [2021-12-21 10:04:04,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 10:04:04,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 10:04:04,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:04:04,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-21 10:04:04,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:04:04,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-12-21 10:04:04,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:04:04,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-21 10:04:04,554 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:04:04,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:04:06,682 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_23| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_23|)) (forall ((v_ArrVal_46 Int)) (= (mod (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#A~0#1.base|) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_23| (* |c_ULTIMATE.start_main_~n~0#1| 4))) v_ArrVal_46) |c_ULTIMATE.start_main_~#A~0#1.offset|) 4294967296) (mod |c_ULTIMATE.start_main_~C~0#1| 4294967296))))) is different from false [2021-12-21 10:04:06,751 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 34 [2021-12-21 10:04:06,756 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 97 treesize of output 95 [2021-12-21 10:04:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 4 not checked. [2021-12-21 10:04:11,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:04:11,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877674663] [2021-12-21 10:04:11,636 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:04:11,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119539744] [2021-12-21 10:04:11,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119539744] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:04:11,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 10:04:11,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-12-21 10:04:11,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923396270] [2021-12-21 10:04:11,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 10:04:11,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 10:04:11,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:04:11,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 10:04:11,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=213, Unknown=1, NotChecked=30, Total=306 [2021-12-21 10:04:11,640 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 10:04:13,672 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~n~0#1| 1500) (forall ((|v_ULTIMATE.start_main_~i~0#1_23| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_23|)) (forall ((v_ArrVal_46 Int)) (= (mod (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#A~0#1.base|) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_23| (* |c_ULTIMATE.start_main_~n~0#1| 4))) v_ArrVal_46) |c_ULTIMATE.start_main_~#A~0#1.offset|) 4294967296) (mod |c_ULTIMATE.start_main_~C~0#1| 4294967296))))) (= |c_ULTIMATE.start_main_~i~0#1| 0) (= |c_ULTIMATE.start_main_~#A~0#1.offset| 0) (= (+ |c_ULTIMATE.start_main_~C~0#1| |c_ULTIMATE.start_main_~i~0#1|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#A~0#1.base|) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| (* (* |c_ULTIMATE.start_main_~n~0#1| 4) |c_ULTIMATE.start_main_~i~0#1|))))) is different from false [2021-12-21 10:04:13,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:04:13,819 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2021-12-21 10:04:13,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 10:04:13,820 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2021-12-21 10:04:13,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:04:13,820 INFO L225 Difference]: With dead ends: 76 [2021-12-21 10:04:13,821 INFO L226 Difference]: Without dead ends: 74 [2021-12-21 10:04:13,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=113, Invalid=355, Unknown=2, NotChecked=82, Total=552 [2021-12-21 10:04:13,821 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 48 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:04:13,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 108 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 124 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2021-12-21 10:04:13,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-21 10:04:13,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2021-12-21 10:04:13,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 52 states have internal predecessors, (66), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:04:13,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-12-21 10:04:13,846 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 26 [2021-12-21 10:04:13,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:04:13,847 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-12-21 10:04:13,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 10:04:13,847 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2021-12-21 10:04:13,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-21 10:04:13,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:04:13,848 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] [2021-12-21 10:04:13,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 10:04:14,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:04:14,059 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:04:14,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:04:14,060 INFO L85 PathProgramCache]: Analyzing trace with hash -789350489, now seen corresponding path program 2 times [2021-12-21 10:04:14,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:04:14,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476778552] [2021-12-21 10:04:14,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:04:14,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:04:14,068 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:04:14,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2033145101] [2021-12-21 10:04:14,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 10:04:14,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:04:14,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:04:14,072 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) [2021-12-21 10:04:14,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 10:04:14,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 10:04:14,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:04:14,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-21 10:04:14,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:04:14,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-21 10:04:14,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:04:14,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:04:14,400 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 30 treesize of output 28 [2021-12-21 10:04:14,404 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 50 treesize of output 46 [2021-12-21 10:04:14,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:04:14,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476778552] [2021-12-21 10:04:14,625 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:04:14,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033145101] [2021-12-21 10:04:14,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033145101] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:04:14,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:04:14,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-12-21 10:04:14,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448908304] [2021-12-21 10:04:14,626 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 10:04:14,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 10:04:14,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:04:14,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 10:04:14,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-12-21 10:04:14,627 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:04:14,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:04:14,755 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2021-12-21 10:04:14,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 10:04:14,756 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-12-21 10:04:14,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:04:14,756 INFO L225 Difference]: With dead ends: 91 [2021-12-21 10:04:14,756 INFO L226 Difference]: Without dead ends: 89 [2021-12-21 10:04:14,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-12-21 10:04:14,757 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 47 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:04:14,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 107 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:04:14,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-21 10:04:14,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 59. [2021-12-21 10:04:14,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 55 states have internal predecessors, (70), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:04:14,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2021-12-21 10:04:14,770 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 26 [2021-12-21 10:04:14,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:04:14,770 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2021-12-21 10:04:14,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:04:14,771 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2021-12-21 10:04:14,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 10:04:14,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:04:14,772 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:04:14,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 10:04:14,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:04:14,993 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:04:14,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:04:14,993 INFO L85 PathProgramCache]: Analyzing trace with hash 67410713, now seen corresponding path program 3 times [2021-12-21 10:04:14,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:04:14,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856866515] [2021-12-21 10:04:14,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:04:14,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:04:15,000 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:04:15,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1382939385] [2021-12-21 10:04:15,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 10:04:15,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:04:15,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:04:15,031 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) [2021-12-21 10:04:15,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 10:04:15,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-21 10:04:15,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:04:15,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 10:04:15,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:04:15,134 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:04:15,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:04:15,183 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:04:15,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:04:15,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856866515] [2021-12-21 10:04:15,184 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:04:15,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382939385] [2021-12-21 10:04:15,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382939385] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:04:15,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 10:04:15,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-21 10:04:15,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536384653] [2021-12-21 10:04:15,185 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 10:04:15,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 10:04:15,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:04:15,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 10:04:15,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:04:15,186 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:04:15,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:04:15,266 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2021-12-21 10:04:15,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 10:04:15,267 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2021-12-21 10:04:15,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:04:15,267 INFO L225 Difference]: With dead ends: 82 [2021-12-21 10:04:15,268 INFO L226 Difference]: Without dead ends: 69 [2021-12-21 10:04:15,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:04:15,268 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 52 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:04:15,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 101 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:04:15,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-21 10:04:15,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2021-12-21 10:04:15,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 55 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:04:15,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2021-12-21 10:04:15,292 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 27 [2021-12-21 10:04:15,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:04:15,292 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2021-12-21 10:04:15,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:04:15,293 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2021-12-21 10:04:15,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 10:04:15,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:04:15,293 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, 1] [2021-12-21 10:04:15,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 10:04:15,496 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,SelfDestructingSolverStorable7 [2021-12-21 10:04:15,497 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:04:15,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:04:15,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1681074929, now seen corresponding path program 1 times [2021-12-21 10:04:15,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:04:15,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473365802] [2021-12-21 10:04:15,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:04:15,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:04:15,504 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:04:15,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [210365981] [2021-12-21 10:04:15,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:04:15,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:04:15,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:04:15,508 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) [2021-12-21 10:04:15,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 10:04:15,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:04:15,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 10:04:15,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:04:15,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 10:04:15,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:04:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 10:04:15,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:04:15,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473365802] [2021-12-21 10:04:15,703 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:04:15,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210365981] [2021-12-21 10:04:15,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210365981] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:04:15,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 10:04:15,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-21 10:04:15,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973511501] [2021-12-21 10:04:15,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 10:04:15,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 10:04:15,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:04:15,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 10:04:15,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:04:15,706 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:04:15,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:04:15,771 INFO L93 Difference]: Finished difference Result 129 states and 152 transitions. [2021-12-21 10:04:15,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 10:04:15,771 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-12-21 10:04:15,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:04:15,773 INFO L225 Difference]: With dead ends: 129 [2021-12-21 10:04:15,773 INFO L226 Difference]: Without dead ends: 102 [2021-12-21 10:04:15,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:04:15,775 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 50 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:04:15,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 73 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:04:15,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-21 10:04:15,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 62. [2021-12-21 10:04:15,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 58 states have (on average 1.206896551724138) internal successors, (70), 58 states have internal predecessors, (70), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:04:15,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2021-12-21 10:04:15,789 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 28 [2021-12-21 10:04:15,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:04:15,789 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2021-12-21 10:04:15,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:04:15,790 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2021-12-21 10:04:15,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 10:04:15,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:04:15,793 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:04:15,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-21 10:04:16,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:04:16,010 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:04:16,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:04:16,010 INFO L85 PathProgramCache]: Analyzing trace with hash 777979813, now seen corresponding path program 4 times [2021-12-21 10:04:16,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:04:16,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640877717] [2021-12-21 10:04:16,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:04:16,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:04:16,017 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:04:16,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1537503537] [2021-12-21 10:04:16,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 10:04:16,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:04:16,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:04:16,032 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) [2021-12-21 10:04:16,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 10:04:16,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 10:04:16,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:04:16,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-21 10:04:16,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:04:16,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-12-21 10:04:16,175 INFO L353 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-12-21 10:04:16,176 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 1 case distinctions, treesize of input 36 treesize of output 35 [2021-12-21 10:04:16,228 INFO L353 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-12-21 10:04:16,229 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 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-21 10:04:16,263 INFO L353 Elim1Store]: treesize reduction 84, result has 18.4 percent of original size [2021-12-21 10:04:16,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2021-12-21 10:04:16,356 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:04:16,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:04:30,160 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_111 Int) (|v_ULTIMATE.start_main_~j~0#1_69| Int) (v_ArrVal_107 Int)) (or (= (mod (select (let ((.cse0 (* |c_ULTIMATE.start_main_~n~0#1| 4))) (let ((.cse1 (* (+ |c_ULTIMATE.start_main_~i~0#1| 1) .cse0))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#A~0#1.base|) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| (* .cse0 |c_ULTIMATE.start_main_~i~0#1|) (* |c_ULTIMATE.start_main_~j~0#1| 4)) v_ArrVal_107) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| .cse1) (+ |c_ULTIMATE.start_main_~C~0#1| |c_ULTIMATE.start_main_~i~0#1| 1)) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| .cse1 (* |v_ULTIMATE.start_main_~j~0#1_69| 4)) v_ArrVal_111))) |c_ULTIMATE.start_main_~#A~0#1.offset|) 4294967296) (mod |c_ULTIMATE.start_main_~C~0#1| 4294967296)) (not (<= 1 |v_ULTIMATE.start_main_~j~0#1_69|)))) is different from false [2021-12-21 10:04:30,199 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 70 treesize of output 68 [2021-12-21 10:04:30,205 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 1078 treesize of output 1074 [2021-12-21 10:04:34,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:04:34,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640877717] [2021-12-21 10:04:34,143 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:04:34,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537503537] [2021-12-21 10:04:34,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537503537] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:04:34,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:04:34,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-12-21 10:04:34,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634050179] [2021-12-21 10:04:34,144 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 10:04:34,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 10:04:34,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:04:34,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 10:04:34,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=354, Unknown=7, NotChecked=40, Total=506 [2021-12-21 10:04:34,144 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:04:34,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:04:34,449 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2021-12-21 10:04:34,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 10:04:34,449 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-12-21 10:04:34,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:04:34,450 INFO L225 Difference]: With dead ends: 124 [2021-12-21 10:04:34,450 INFO L226 Difference]: Without dead ends: 122 [2021-12-21 10:04:34,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=244, Invalid=745, Unknown=7, NotChecked=60, Total=1056 [2021-12-21 10:04:34,451 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 58 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:04:34,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 112 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:04:34,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-21 10:04:34,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 86. [2021-12-21 10:04:34,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.1951219512195121) internal successors, (98), 82 states have internal predecessors, (98), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:04:34,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2021-12-21 10:04:34,465 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 28 [2021-12-21 10:04:34,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:04:34,466 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2021-12-21 10:04:34,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:04:34,467 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2021-12-21 10:04:34,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-21 10:04:34,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:04:34,471 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:04:34,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 10:04:34,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-21 10:04:34,689 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:04:34,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:04:34,690 INFO L85 PathProgramCache]: Analyzing trace with hash -589628086, now seen corresponding path program 3 times [2021-12-21 10:04:34,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:04:34,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282266290] [2021-12-21 10:04:34,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:04:34,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:04:34,701 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:04:34,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1278794975] [2021-12-21 10:04:34,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 10:04:34,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:04:34,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:04:34,703 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:04:34,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 10:04:34,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-21 10:04:34,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:04:34,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 10:04:34,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:04:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:04:34,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:04:34,903 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:04:34,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:04:34,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282266290] [2021-12-21 10:04:34,904 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:04:34,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278794975] [2021-12-21 10:04:34,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278794975] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:04:34,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 10:04:34,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-12-21 10:04:34,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288052868] [2021-12-21 10:04:34,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 10:04:34,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 10:04:34,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:04:34,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 10:04:34,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:04:34,906 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:04:35,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:04:35,033 INFO L93 Difference]: Finished difference Result 208 states and 249 transitions. [2021-12-21 10:04:35,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 10:04:35,033 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2021-12-21 10:04:35,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:04:35,035 INFO L225 Difference]: With dead ends: 208 [2021-12-21 10:04:35,035 INFO L226 Difference]: Without dead ends: 163 [2021-12-21 10:04:35,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-12-21 10:04:35,036 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 111 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:04:35,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 134 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:04:35,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-21 10:04:35,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 130. [2021-12-21 10:04:35,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 126 states have (on average 1.2222222222222223) internal successors, (154), 126 states have internal predecessors, (154), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:04:35,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 158 transitions. [2021-12-21 10:04:35,048 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 158 transitions. Word has length 29 [2021-12-21 10:04:35,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:04:35,049 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 158 transitions. [2021-12-21 10:04:35,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:04:35,049 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 158 transitions. [2021-12-21 10:04:35,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-21 10:04:35,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:04:35,050 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:04:35,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-21 10:04:35,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-21 10:04:35,262 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:04:35,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:04:35,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1018620818, now seen corresponding path program 5 times [2021-12-21 10:04:35,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:04:35,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145078626] [2021-12-21 10:04:35,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:04:35,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:04:35,272 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:04:35,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316134306] [2021-12-21 10:04:35,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 10:04:35,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:04:35,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:04:35,282 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:04:35,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 10:04:35,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-21 10:04:35,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:04:35,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-21 10:04:35,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:04:35,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-12-21 10:04:35,510 INFO L353 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-12-21 10:04:35,511 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-21 10:04:35,580 INFO L353 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-12-21 10:04:35,580 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 1 case distinctions, treesize of input 28 treesize of output 27 [2021-12-21 10:04:35,645 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:04:35,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:04:44,020 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_46| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_46|)) (forall ((|v_ULTIMATE.start_main_~j~0#1_91| Int)) (or (forall ((v_ArrVal_146 Int)) (= (mod |c_ULTIMATE.start_main_~C~0#1| 4294967296) (mod (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#A~0#1.base|) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_46| (* |c_ULTIMATE.start_main_~n~0#1| 4)) (* |v_ULTIMATE.start_main_~j~0#1_91| 4)) v_ArrVal_146) |c_ULTIMATE.start_main_~#A~0#1.offset|) 4294967296))) (not (<= 0 |v_ULTIMATE.start_main_~j~0#1_91|)))))) is different from false [2021-12-21 10:05:07,320 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 48 treesize of output 46 [2021-12-21 10:05:07,325 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 2070 treesize of output 2054