./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_m2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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-crafted/zero_sum_m2.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 64e2b591ee375a99f019d69fefe326e9fd46db25f76a67e4f3bee333adbec68f --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 11:26:19,162 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 11:26:19,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 11:26:19,219 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 11:26:19,219 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 11:26:19,222 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 11:26:19,226 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 11:26:19,229 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 11:26:19,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 11:26:19,235 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 11:26:19,236 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 11:26:19,237 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 11:26:19,237 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 11:26:19,239 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 11:26:19,240 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 11:26:19,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 11:26:19,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 11:26:19,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 11:26:19,248 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 11:26:19,249 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 11:26:19,253 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 11:26:19,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 11:26:19,254 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 11:26:19,255 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 11:26:19,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 11:26:19,258 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 11:26:19,258 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 11:26:19,260 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 11:26:19,260 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 11:26:19,261 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 11:26:19,261 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 11:26:19,263 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 11:26:19,264 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 11:26:19,265 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 11:26:19,266 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 11:26:19,266 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 11:26:19,267 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 11:26:19,267 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 11:26:19,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 11:26:19,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 11:26:19,268 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 11:26:19,269 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 11:26:19,293 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 11:26:19,296 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 11:26:19,297 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 11:26:19,297 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 11:26:19,297 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 11:26:19,298 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 11:26:19,299 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 11:26:19,299 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 11:26:19,299 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 11:26:19,300 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 11:26:19,301 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 11:26:19,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 11:26:19,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 11:26:19,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 11:26:19,301 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 11:26:19,301 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 11:26:19,302 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 11:26:19,302 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 11:26:19,302 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 11:26:19,302 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 11:26:19,302 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 11:26:19,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 11:26:19,303 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 11:26:19,303 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 11:26:19,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:26:19,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 11:26:19,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 11:26:19,305 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 11:26:19,306 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 11:26:19,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 11:26:19,306 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 11:26:19,306 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 11:26:19,306 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 11:26:19,307 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 11:26:19,307 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64e2b591ee375a99f019d69fefe326e9fd46db25f76a67e4f3bee333adbec68f [2021-12-14 11:26:19,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 11:26:19,517 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 11:26:19,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 11:26:19,520 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 11:26:19,521 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 11:26:19,521 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_m2.c [2021-12-14 11:26:19,582 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a7fb8d8c/d6be7ea4138a423dae92f97ecb1d9ecd/FLAGaf1388c70 [2021-12-14 11:26:19,937 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 11:26:19,937 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m2.c [2021-12-14 11:26:19,941 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a7fb8d8c/d6be7ea4138a423dae92f97ecb1d9ecd/FLAGaf1388c70 [2021-12-14 11:26:20,385 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a7fb8d8c/d6be7ea4138a423dae92f97ecb1d9ecd [2021-12-14 11:26:20,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 11:26:20,388 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 11:26:20,389 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 11:26:20,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 11:26:20,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 11:26:20,392 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:26:20" (1/1) ... [2021-12-14 11:26:20,393 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@435b1fc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:20, skipping insertion in model container [2021-12-14 11:26:20,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:26:20" (1/1) ... [2021-12-14 11:26:20,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 11:26:20,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 11:26:20,536 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-crafted/zero_sum_m2.c[402,415] [2021-12-14 11:26:20,548 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:26:20,553 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 11:26:20,560 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-crafted/zero_sum_m2.c[402,415] [2021-12-14 11:26:20,571 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:26:20,581 INFO L208 MainTranslator]: Completed translation [2021-12-14 11:26:20,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:20 WrapperNode [2021-12-14 11:26:20,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 11:26:20,583 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 11:26:20,583 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 11:26:20,583 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 11:26:20,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:20" (1/1) ... [2021-12-14 11:26:20,594 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:20" (1/1) ... [2021-12-14 11:26:20,617 INFO L137 Inliner]: procedures = 15, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2021-12-14 11:26:20,618 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 11:26:20,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 11:26:20,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 11:26:20,619 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 11:26:20,624 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:20" (1/1) ... [2021-12-14 11:26:20,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:20" (1/1) ... [2021-12-14 11:26:20,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:20" (1/1) ... [2021-12-14 11:26:20,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:20" (1/1) ... [2021-12-14 11:26:20,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:20" (1/1) ... [2021-12-14 11:26:20,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:20" (1/1) ... [2021-12-14 11:26:20,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:20" (1/1) ... [2021-12-14 11:26:20,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 11:26:20,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 11:26:20,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 11:26:20,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 11:26:20,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:20" (1/1) ... [2021-12-14 11:26:20,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:26:20,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:26:20,685 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) [2021-12-14 11:26:20,698 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 [2021-12-14 11:26:20,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 11:26:20,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 11:26:20,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 11:26:20,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 11:26:20,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 11:26:20,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 11:26:20,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 11:26:20,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 11:26:20,763 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 11:26:20,764 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 11:26:20,888 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 11:26:20,893 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 11:26:20,893 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-14 11:26:20,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:26:20 BoogieIcfgContainer [2021-12-14 11:26:20,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 11:26:20,900 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 11:26:20,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 11:26:20,903 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 11:26:20,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:26:20" (1/3) ... [2021-12-14 11:26:20,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24a8574e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:26:20, skipping insertion in model container [2021-12-14 11:26:20,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:20" (2/3) ... [2021-12-14 11:26:20,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24a8574e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:26:20, skipping insertion in model container [2021-12-14 11:26:20,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:26:20" (3/3) ... [2021-12-14 11:26:20,906 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_m2.c [2021-12-14 11:26:20,910 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 11:26:20,910 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 11:26:20,953 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 11:26:20,958 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 [2021-12-14 11:26:20,959 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 11:26:20,968 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:20,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-14 11:26:20,971 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:26:20,972 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:26:20,972 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:26:20,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:26:20,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1122046426, now seen corresponding path program 1 times [2021-12-14 11:26:20,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:26:20,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752284148] [2021-12-14 11:26:20,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:26:20,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:26:21,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:21,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:26:21,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:26:21,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752284148] [2021-12-14 11:26:21,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752284148] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:26:21,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:26:21,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 11:26:21,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281842696] [2021-12-14 11:26:21,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:26:21,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 11:26:21,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:26:21,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 11:26:21,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 11:26:21,176 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:21,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:26:21,189 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2021-12-14 11:26:21,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 11:26:21,191 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-14 11:26:21,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:26:21,196 INFO L225 Difference]: With dead ends: 47 [2021-12-14 11:26:21,196 INFO L226 Difference]: Without dead ends: 21 [2021-12-14 11:26:21,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 11:26:21,201 INFO L933 BasicCegarLoop]: 31 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, 31 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 [2021-12-14 11:26:21,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:26:21,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-14 11:26:21,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-14 11:26:21,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:21,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-12-14 11:26:21,227 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2021-12-14 11:26:21,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:26:21,227 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-12-14 11:26:21,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:21,228 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-12-14 11:26:21,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-14 11:26:21,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:26:21,228 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:26:21,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 11:26:21,229 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:26:21,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:26:21,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1896542740, now seen corresponding path program 1 times [2021-12-14 11:26:21,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:26:21,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757397082] [2021-12-14 11:26:21,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:26:21,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:26:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:21,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:26:21,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:26:21,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757397082] [2021-12-14 11:26:21,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757397082] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:26:21,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:26:21,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 11:26:21,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936245395] [2021-12-14 11:26:21,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:26:21,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 11:26:21,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:26:21,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 11:26:21,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 11:26:21,328 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:21,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:26:21,361 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-12-14 11:26:21,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 11:26:21,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-14 11:26:21,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:26:21,363 INFO L225 Difference]: With dead ends: 39 [2021-12-14 11:26:21,364 INFO L226 Difference]: Without dead ends: 23 [2021-12-14 11:26:21,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 11:26:21,366 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:26:21,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:26:21,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-14 11:26:21,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-12-14 11:26:21,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:21,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-12-14 11:26:21,373 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2021-12-14 11:26:21,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:26:21,374 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-12-14 11:26:21,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:21,375 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-12-14 11:26:21,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 11:26:21,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:26:21,377 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:26:21,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 11:26:21,377 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:26:21,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:26:21,378 INFO L85 PathProgramCache]: Analyzing trace with hash -66597874, now seen corresponding path program 1 times [2021-12-14 11:26:21,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:26:21,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970030508] [2021-12-14 11:26:21,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:26:21,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:26:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 11:26:21,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:26:21,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970030508] [2021-12-14 11:26:21,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970030508] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:26:21,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:26:21,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 11:26:21,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532466122] [2021-12-14 11:26:21,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:26:21,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 11:26:21,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:26:21,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 11:26:21,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 11:26:21,418 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:21,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:26:21,460 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2021-12-14 11:26:21,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 11:26:21,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-14 11:26:21,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:26:21,461 INFO L225 Difference]: With dead ends: 43 [2021-12-14 11:26:21,462 INFO L226 Difference]: Without dead ends: 30 [2021-12-14 11:26:21,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 11:26:21,463 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:26:21,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 15 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:26:21,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-14 11:26:21,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2021-12-14 11:26:21,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:21,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-12-14 11:26:21,467 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2021-12-14 11:26:21,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:26:21,467 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-12-14 11:26:21,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:21,468 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-12-14 11:26:21,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-14 11:26:21,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:26:21,468 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:26:21,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 11:26:21,469 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:26:21,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:26:21,469 INFO L85 PathProgramCache]: Analyzing trace with hash -2060422634, now seen corresponding path program 1 times [2021-12-14 11:26:21,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:26:21,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580010223] [2021-12-14 11:26:21,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:26:21,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:26:21,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:21,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 11:26:21,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:26:21,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580010223] [2021-12-14 11:26:21,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580010223] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:26:21,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532161199] [2021-12-14 11:26:21,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:26:21,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:26:21,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:26:21,541 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) [2021-12-14 11:26:21,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 11:26:21,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:21,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 11:26:21,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:26:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 11:26:21,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:26:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 11:26:21,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532161199] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:26:21,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:26:21,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-14 11:26:21,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172828991] [2021-12-14 11:26:21,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:26:21,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 11:26:21,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:26:21,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 11:26:21,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-14 11:26:21,754 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:21,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:26:21,797 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-12-14 11:26:21,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 11:26:21,798 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-14 11:26:21,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:26:21,799 INFO L225 Difference]: With dead ends: 49 [2021-12-14 11:26:21,800 INFO L226 Difference]: Without dead ends: 29 [2021-12-14 11:26:21,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-14 11:26:21,801 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:26:21,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 45 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:26:21,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-14 11:26:21,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-12-14 11:26:21,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:21,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-12-14 11:26:21,814 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2021-12-14 11:26:21,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:26:21,815 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-12-14 11:26:21,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:21,815 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-12-14 11:26:21,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-14 11:26:21,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:26:21,815 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:26:21,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 11:26:22,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:26:22,016 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:26:22,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:26:22,017 INFO L85 PathProgramCache]: Analyzing trace with hash -959615560, now seen corresponding path program 2 times [2021-12-14 11:26:22,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:26:22,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231250760] [2021-12-14 11:26:22,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:26:22,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:26:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:22,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 11:26:22,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:26:22,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231250760] [2021-12-14 11:26:22,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231250760] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:26:22,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990178338] [2021-12-14 11:26:22,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 11:26:22,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:26:22,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:26:22,058 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) [2021-12-14 11:26:22,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 11:26:22,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 11:26:22,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:26:22,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 11:26:22,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:26:22,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 11:26:22,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:26:22,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 11:26:22,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990178338] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:26:22,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:26:22,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-14 11:26:22,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125454621] [2021-12-14 11:26:22,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:26:22,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 11:26:22,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:26:22,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 11:26:22,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-14 11:26:22,248 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:22,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:26:22,323 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2021-12-14 11:26:22,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 11:26:22,323 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-14 11:26:22,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:26:22,324 INFO L225 Difference]: With dead ends: 56 [2021-12-14 11:26:22,324 INFO L226 Difference]: Without dead ends: 40 [2021-12-14 11:26:22,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-12-14 11:26:22,325 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:26:22,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 15 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:26:22,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-14 11:26:22,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2021-12-14 11:26:22,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:22,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-12-14 11:26:22,328 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2021-12-14 11:26:22,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:26:22,328 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-12-14 11:26:22,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:22,328 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-12-14 11:26:22,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-14 11:26:22,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:26:22,329 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:26:22,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-14 11:26:22,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:26:22,544 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:26:22,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:26:22,544 INFO L85 PathProgramCache]: Analyzing trace with hash -2048824896, now seen corresponding path program 3 times [2021-12-14 11:26:22,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:26:22,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381479302] [2021-12-14 11:26:22,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:26:22,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:26:22,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:23,430 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:26:23,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:26:23,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381479302] [2021-12-14 11:26:23,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381479302] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:26:23,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123075808] [2021-12-14 11:26:23,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 11:26:23,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:26:23,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:26:23,432 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) [2021-12-14 11:26:23,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 11:26:23,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-14 11:26:23,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:26:23,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-14 11:26:23,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:26:23,570 INFO L388 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 [2021-12-14 11:26:25,277 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 11:26:25,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2021-12-14 11:26:25,515 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:26:25,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:26:34,629 INFO L388 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 72 treesize of output 64 [2021-12-14 11:26:34,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 11:26:34,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 215 [2021-12-14 11:26:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:26:35,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123075808] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:26:35,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:26:35,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 29, 29] total 73 [2021-12-14 11:26:35,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911714912] [2021-12-14 11:26:35,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:26:35,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-14 11:26:35,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:26:35,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-14 11:26:35,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=4855, Unknown=1, NotChecked=0, Total=5256 [2021-12-14 11:26:35,065 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 73 states, 73 states have (on average 1.3287671232876712) internal successors, (97), 73 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:38,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:26:38,850 INFO L93 Difference]: Finished difference Result 100 states and 115 transitions. [2021-12-14 11:26:38,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-14 11:26:38,851 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.3287671232876712) internal successors, (97), 73 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-14 11:26:38,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:26:38,853 INFO L225 Difference]: With dead ends: 100 [2021-12-14 11:26:38,853 INFO L226 Difference]: Without dead ends: 94 [2021-12-14 11:26:38,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 18 SyntacticMatches, 11 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3616 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=865, Invalid=11344, Unknown=1, NotChecked=0, Total=12210 [2021-12-14 11:26:38,856 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 62 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 403 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 11:26:38,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 124 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 278 Invalid, 0 Unknown, 403 Unchecked, 0.2s Time] [2021-12-14 11:26:38,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-14 11:26:38,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 65. [2021-12-14 11:26:38,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.1875) internal successors, (76), 64 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:38,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2021-12-14 11:26:38,866 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 35 [2021-12-14 11:26:38,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:26:38,866 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2021-12-14 11:26:38,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.3287671232876712) internal successors, (97), 73 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:38,866 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2021-12-14 11:26:38,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-14 11:26:38,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:26:38,867 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:26:38,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 11:26:39,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:26:39,086 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:26:39,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:26:39,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1772469278, now seen corresponding path program 4 times [2021-12-14 11:26:39,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:26:39,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355677384] [2021-12-14 11:26:39,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:26:39,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:26:39,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 11:26:39,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:26:39,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355677384] [2021-12-14 11:26:39,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355677384] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:26:39,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338596057] [2021-12-14 11:26:39,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 11:26:39,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:26:39,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:26:39,193 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) [2021-12-14 11:26:39,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 11:26:39,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 11:26:39,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:26:39,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 11:26:39,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:26:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 11:26:39,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:26:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 11:26:39,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338596057] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:26:39,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:26:39,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-14 11:26:39,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175566994] [2021-12-14 11:26:39,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:26:39,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 11:26:39,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:26:39,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 11:26:39,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-12-14 11:26:39,413 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:39,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:26:39,544 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2021-12-14 11:26:39,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 11:26:39,544 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-14 11:26:39,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:26:39,545 INFO L225 Difference]: With dead ends: 113 [2021-12-14 11:26:39,545 INFO L226 Difference]: Without dead ends: 65 [2021-12-14 11:26:39,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-12-14 11:26:39,546 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:26:39,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 57 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:26:39,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-14 11:26:39,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-12-14 11:26:39,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.171875) internal successors, (75), 64 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:39,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2021-12-14 11:26:39,551 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 37 [2021-12-14 11:26:39,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:26:39,551 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2021-12-14 11:26:39,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:39,554 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2021-12-14 11:26:39,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-14 11:26:39,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:26:39,557 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:26:39,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 11:26:39,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:26:39,768 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:26:39,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:26:39,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1270817660, now seen corresponding path program 5 times [2021-12-14 11:26:39,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:26:39,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601506616] [2021-12-14 11:26:39,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:26:39,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:26:39,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:39,843 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-14 11:26:39,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:26:39,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601506616] [2021-12-14 11:26:39,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601506616] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:26:39,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246792955] [2021-12-14 11:26:39,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 11:26:39,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:26:39,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:26:39,852 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) [2021-12-14 11:26:39,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 11:26:39,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-14 11:26:39,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:26:39,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 11:26:39,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:26:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-14 11:26:39,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:26:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-14 11:26:40,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246792955] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:26:40,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:26:40,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-14 11:26:40,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946464097] [2021-12-14 11:26:40,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:26:40,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 11:26:40,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:26:40,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 11:26:40,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-14 11:26:40,066 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:40,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:26:40,206 INFO L93 Difference]: Finished difference Result 99 states and 115 transitions. [2021-12-14 11:26:40,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 11:26:40,206 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-14 11:26:40,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:26:40,207 INFO L225 Difference]: With dead ends: 99 [2021-12-14 11:26:40,207 INFO L226 Difference]: Without dead ends: 62 [2021-12-14 11:26:40,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-12-14 11:26:40,208 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 117 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:26:40,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 30 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:26:40,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-14 11:26:40,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2021-12-14 11:26:40,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:40,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-12-14 11:26:40,212 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2021-12-14 11:26:40,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:26:40,212 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-12-14 11:26:40,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:40,212 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-12-14 11:26:40,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 11:26:40,213 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:26:40,213 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:26:40,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-14 11:26:40,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:26:40,414 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:26:40,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:26:40,414 INFO L85 PathProgramCache]: Analyzing trace with hash -604138262, now seen corresponding path program 6 times [2021-12-14 11:26:40,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:26:40,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892149997] [2021-12-14 11:26:40,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:26:40,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:26:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:26:41,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:26:41,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892149997] [2021-12-14 11:26:41,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892149997] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:26:41,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400171175] [2021-12-14 11:26:41,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 11:26:41,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:26:41,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:26:41,868 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) [2021-12-14 11:26:41,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 11:26:41,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-14 11:26:41,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:26:41,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-14 11:26:41,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:26:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 11:26:43,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:26:44,402 INFO L354 Elim1Store]: treesize reduction 114, result has 46.0 percent of original size [2021-12-14 11:26:44,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 108 [2021-12-14 11:26:44,638 INFO L354 Elim1Store]: treesize reduction 198, result has 6.2 percent of original size [2021-12-14 11:26:44,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 23 [2021-12-14 11:26:44,741 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 11:26:44,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400171175] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:26:44,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:26:44,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 28, 26] total 75 [2021-12-14 11:26:44,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018220361] [2021-12-14 11:26:44,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:26:44,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-14 11:26:44,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:26:44,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-14 11:26:44,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=5268, Unknown=0, NotChecked=0, Total=5550 [2021-12-14 11:26:44,746 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 75 states, 75 states have (on average 1.4533333333333334) internal successors, (109), 75 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:47,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:26:47,509 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2021-12-14 11:26:47,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-14 11:26:47,510 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.4533333333333334) internal successors, (109), 75 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-14 11:26:47,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:26:47,510 INFO L225 Difference]: With dead ends: 81 [2021-12-14 11:26:47,510 INFO L226 Difference]: Without dead ends: 77 [2021-12-14 11:26:47,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2928 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=567, Invalid=9333, Unknown=0, NotChecked=0, Total=9900 [2021-12-14 11:26:47,512 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 2040 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 2142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:26:47,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 133 Invalid, 2142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2040 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 11:26:47,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-14 11:26:47,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2021-12-14 11:26:47,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.121212121212121) internal successors, (74), 66 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:47,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2021-12-14 11:26:47,517 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 45 [2021-12-14 11:26:47,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:26:47,517 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2021-12-14 11:26:47,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.4533333333333334) internal successors, (109), 75 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:47,518 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2021-12-14 11:26:47,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-14 11:26:47,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:26:47,518 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:26:47,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-14 11:26:47,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:26:47,726 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:26:47,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:26:47,726 INFO L85 PathProgramCache]: Analyzing trace with hash -703050612, now seen corresponding path program 7 times [2021-12-14 11:26:47,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:26:47,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171316784] [2021-12-14 11:26:47,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:26:47,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:26:47,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:47,828 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-14 11:26:47,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:26:47,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171316784] [2021-12-14 11:26:47,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171316784] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:26:47,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459226738] [2021-12-14 11:26:47,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 11:26:47,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:26:47,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:26:47,831 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) [2021-12-14 11:26:47,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 11:26:47,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:47,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-14 11:26:47,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:26:47,960 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-14 11:26:47,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:26:48,006 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-14 11:26:48,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459226738] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:26:48,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:26:48,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-14 11:26:48,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654996872] [2021-12-14 11:26:48,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:26:48,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-14 11:26:48,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:26:48,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-14 11:26:48,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-12-14 11:26:48,007 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:48,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:26:48,124 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2021-12-14 11:26:48,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 11:26:48,125 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-14 11:26:48,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:26:48,125 INFO L225 Difference]: With dead ends: 132 [2021-12-14 11:26:48,125 INFO L226 Difference]: Without dead ends: 70 [2021-12-14 11:26:48,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2021-12-14 11:26:48,134 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 53 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:26:48,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 75 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:26:48,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-14 11:26:48,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-12-14 11:26:48,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 68 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:48,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2021-12-14 11:26:48,140 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 47 [2021-12-14 11:26:48,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:26:48,140 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2021-12-14 11:26:48,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:48,140 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2021-12-14 11:26:48,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-14 11:26:48,141 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:26:48,141 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:26:48,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 11:26:48,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:26:48,354 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:26:48,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:26:48,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1331298990, now seen corresponding path program 8 times [2021-12-14 11:26:48,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:26:48,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684449470] [2021-12-14 11:26:48,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:26:48,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:26:48,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:48,459 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-14 11:26:48,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:26:48,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684449470] [2021-12-14 11:26:48,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684449470] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:26:48,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717257187] [2021-12-14 11:26:48,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 11:26:48,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:26:48,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:26:48,461 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) [2021-12-14 11:26:48,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 11:26:48,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 11:26:48,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:26:48,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-14 11:26:48,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:26:48,615 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-14 11:26:48,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:26:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-14 11:26:48,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717257187] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:26:48,669 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:26:48,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-14 11:26:48,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129074875] [2021-12-14 11:26:48,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:26:48,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-14 11:26:48,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:26:48,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-14 11:26:48,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 11:26:48,671 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:48,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:26:48,769 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2021-12-14 11:26:48,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 11:26:48,769 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-14 11:26:48,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:26:48,771 INFO L225 Difference]: With dead ends: 101 [2021-12-14 11:26:48,771 INFO L226 Difference]: Without dead ends: 60 [2021-12-14 11:26:48,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2021-12-14 11:26:48,772 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 152 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:26:48,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 23 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:26:48,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-14 11:26:48,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2021-12-14 11:26:48,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:48,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-12-14 11:26:48,783 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2021-12-14 11:26:48,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:26:48,783 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-12-14 11:26:48,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:48,783 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-12-14 11:26:48,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-14 11:26:48,784 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:26:48,784 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:26:48,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 11:26:49,000 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,SelfDestructingSolverStorable10 [2021-12-14 11:26:49,000 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:26:49,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:26:49,001 INFO L85 PathProgramCache]: Analyzing trace with hash -2047700076, now seen corresponding path program 9 times [2021-12-14 11:26:49,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:26:49,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747650281] [2021-12-14 11:26:49,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:26:49,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:26:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:26:51,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:26:51,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747650281] [2021-12-14 11:26:51,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747650281] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:26:51,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265423144] [2021-12-14 11:26:51,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 11:26:51,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:26:51,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:26:51,081 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) [2021-12-14 11:26:51,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 11:26:51,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-14 11:26:51,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:26:51,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-14 11:26:51,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:26:51,209 INFO L388 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 [2021-12-14 11:26:55,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:26:55,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:26:55,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:26:55,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 11:26:55,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 51 [2021-12-14 11:26:55,573 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 11:26:55,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:27:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 11:27:06,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265423144] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:27:06,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:27:06,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 40, 38] total 116 [2021-12-14 11:27:06,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776042554] [2021-12-14 11:27:06,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:27:06,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-12-14 11:27:06,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:27:06,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-12-14 11:27:06,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=644, Invalid=12696, Unknown=0, NotChecked=0, Total=13340 [2021-12-14 11:27:06,158 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 116 states, 116 states have (on average 1.2844827586206897) internal successors, (149), 116 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:27:13,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:27:13,614 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2021-12-14 11:27:13,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-14 11:27:13,615 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.2844827586206897) internal successors, (149), 116 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-14 11:27:13,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:27:13,615 INFO L225 Difference]: With dead ends: 93 [2021-12-14 11:27:13,615 INFO L226 Difference]: Without dead ends: 89 [2021-12-14 11:27:13,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6665 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=1352, Invalid=26038, Unknown=0, NotChecked=0, Total=27390 [2021-12-14 11:27:13,620 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 43 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 1788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1043 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 11:27:13,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 227 Invalid, 1788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 696 Invalid, 0 Unknown, 1043 Unchecked, 0.3s Time] [2021-12-14 11:27:13,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-14 11:27:13,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2021-12-14 11:27:13,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:27:13,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2021-12-14 11:27:13,638 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 55 [2021-12-14 11:27:13,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:27:13,638 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2021-12-14 11:27:13,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.2844827586206897) internal successors, (149), 116 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:27:13,639 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2021-12-14 11:27:13,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-14 11:27:13,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:27:13,640 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:27:13,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 11:27:13,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:27:13,857 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:27:13,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:27:13,858 INFO L85 PathProgramCache]: Analyzing trace with hash -691517258, now seen corresponding path program 10 times [2021-12-14 11:27:13,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:27:13,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127482302] [2021-12-14 11:27:13,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:27:13,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:27:13,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:27:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-14 11:27:13,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:27:13,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127482302] [2021-12-14 11:27:13,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127482302] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:27:13,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234553981] [2021-12-14 11:27:13,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 11:27:13,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:27:13,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:27:13,974 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) [2021-12-14 11:27:13,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 11:27:14,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 11:27:14,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:27:14,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 11:27:14,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:27:14,187 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-14 11:27:14,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:27:14,277 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-14 11:27:14,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234553981] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:27:14,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:27:14,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-14 11:27:14,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198726277] [2021-12-14 11:27:14,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:27:14,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 11:27:14,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:27:14,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 11:27:14,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-12-14 11:27:14,279 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:27:14,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:27:14,450 INFO L93 Difference]: Finished difference Result 160 states and 174 transitions. [2021-12-14 11:27:14,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 11:27:14,451 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-14 11:27:14,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:27:14,451 INFO L225 Difference]: With dead ends: 160 [2021-12-14 11:27:14,451 INFO L226 Difference]: Without dead ends: 84 [2021-12-14 11:27:14,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-12-14 11:27:14,453 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:27:14,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 69 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:27:14,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-14 11:27:14,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-12-14 11:27:14,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0975609756097562) internal successors, (90), 82 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:27:14,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2021-12-14 11:27:14,459 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 57 [2021-12-14 11:27:14,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:27:14,459 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2021-12-14 11:27:14,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:27:14,459 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2021-12-14 11:27:14,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-14 11:27:14,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:27:14,460 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:27:14,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 11:27:14,675 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,SelfDestructingSolverStorable12 [2021-12-14 11:27:14,675 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:27:14,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:27:14,676 INFO L85 PathProgramCache]: Analyzing trace with hash -801227688, now seen corresponding path program 11 times [2021-12-14 11:27:14,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:27:14,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260050021] [2021-12-14 11:27:14,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:27:14,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:27:14,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:27:14,778 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-14 11:27:14,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:27:14,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260050021] [2021-12-14 11:27:14,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260050021] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:27:14,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306167294] [2021-12-14 11:27:14,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 11:27:14,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:27:14,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:27:14,780 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) [2021-12-14 11:27:14,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 11:27:14,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-14 11:27:14,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:27:14,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 11:27:14,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:27:15,020 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-14 11:27:15,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:27:15,096 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-14 11:27:15,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306167294] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:27:15,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:27:15,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-14 11:27:15,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901797525] [2021-12-14 11:27:15,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:27:15,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 11:27:15,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:27:15,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 11:27:15,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-12-14 11:27:15,099 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:27:15,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:27:15,253 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2021-12-14 11:27:15,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 11:27:15,253 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-14 11:27:15,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:27:15,254 INFO L225 Difference]: With dead ends: 119 [2021-12-14 11:27:15,254 INFO L226 Difference]: Without dead ends: 70 [2021-12-14 11:27:15,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=208, Invalid=494, Unknown=0, NotChecked=0, Total=702 [2021-12-14 11:27:15,257 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 120 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:27:15,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 30 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:27:15,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-14 11:27:15,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2021-12-14 11:27:15,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:27:15,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-12-14 11:27:15,271 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 59 [2021-12-14 11:27:15,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:27:15,271 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-12-14 11:27:15,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:27:15,271 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-12-14 11:27:15,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 11:27:15,272 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:27:15,272 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:27:15,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-14 11:27:15,479 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,SelfDestructingSolverStorable13 [2021-12-14 11:27:15,480 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:27:15,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:27:15,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1079638594, now seen corresponding path program 12 times [2021-12-14 11:27:15,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:27:15,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835927041] [2021-12-14 11:27:15,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:27:15,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:27:15,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:27:17,922 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:27:17,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:27:17,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835927041] [2021-12-14 11:27:17,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835927041] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:27:17,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865424144] [2021-12-14 11:27:17,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 11:27:17,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:27:17,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:27:17,924 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) [2021-12-14 11:27:17,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-14 11:27:18,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-14 11:27:18,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:27:18,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 102 conjunts are in the unsatisfiable core [2021-12-14 11:27:18,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:27:23,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 11:27:23,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2021-12-14 11:27:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 3 proven. 121 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 11:27:23,882 INFO L328 TraceCheckSpWp]: Computing backward predicates...