./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_m3.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_m3.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 1743decb4413dd023f2c21969cafbefd9f03a99467b1795f9affedc42875deb2 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 11:26:21,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 11:26:21,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 11:26:21,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 11:26:21,156 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 11:26:21,158 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 11:26:21,159 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 11:26:21,161 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 11:26:21,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 11:26:21,165 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 11:26:21,166 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 11:26:21,167 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 11:26:21,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 11:26:21,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 11:26:21,187 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 11:26:21,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 11:26:21,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 11:26:21,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 11:26:21,192 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 11:26:21,197 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 11:26:21,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 11:26:21,198 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 11:26:21,200 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 11:26:21,200 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 11:26:21,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 11:26:21,205 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 11:26:21,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 11:26:21,207 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 11:26:21,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 11:26:21,207 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 11:26:21,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 11:26:21,208 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 11:26:21,209 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 11:26:21,210 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 11:26:21,211 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 11:26:21,211 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 11:26:21,212 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 11:26:21,212 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 11:26:21,213 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 11:26:21,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 11:26:21,228 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 11:26:21,228 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 11:26:21,256 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 11:26:21,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 11:26:21,257 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 11:26:21,257 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 11:26:21,258 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 11:26:21,258 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 11:26:21,259 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 11:26:21,259 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 11:26:21,259 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 11:26:21,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 11:26:21,260 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 11:26:21,260 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 11:26:21,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 11:26:21,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 11:26:21,265 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 11:26:21,275 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 11:26:21,275 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 11:26:21,275 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 11:26:21,276 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 11:26:21,276 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 11:26:21,276 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 11:26:21,276 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 11:26:21,276 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 11:26:21,276 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 11:26:21,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:26:21,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 11:26:21,277 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 11:26:21,277 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 11:26:21,277 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 11:26:21,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 11:26:21,277 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 11:26:21,278 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 11:26:21,278 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 11:26:21,278 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 11:26:21,278 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1743decb4413dd023f2c21969cafbefd9f03a99467b1795f9affedc42875deb2 [2021-12-14 11:26:21,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 11:26:21,686 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 11:26:21,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 11:26:21,689 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 11:26:21,690 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 11:26:21,691 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_m3.c [2021-12-14 11:26:21,740 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72b3ca5e3/b444c2059e814bab9c4876f7a35e74f0/FLAGa4363eed6 [2021-12-14 11:26:22,168 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 11:26:22,169 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m3.c [2021-12-14 11:26:22,173 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72b3ca5e3/b444c2059e814bab9c4876f7a35e74f0/FLAGa4363eed6 [2021-12-14 11:26:22,195 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72b3ca5e3/b444c2059e814bab9c4876f7a35e74f0 [2021-12-14 11:26:22,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 11:26:22,198 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 11:26:22,199 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 11:26:22,199 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 11:26:22,201 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 11:26:22,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:26:22" (1/1) ... [2021-12-14 11:26:22,202 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dd2f6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:22, skipping insertion in model container [2021-12-14 11:26:22,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:26:22" (1/1) ... [2021-12-14 11:26:22,214 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 11:26:22,224 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 11:26:22,316 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_m3.c[402,415] [2021-12-14 11:26:22,327 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:26:22,332 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 11:26:22,340 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_m3.c[402,415] [2021-12-14 11:26:22,345 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:26:22,353 INFO L208 MainTranslator]: Completed translation [2021-12-14 11:26:22,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:22 WrapperNode [2021-12-14 11:26:22,354 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 11:26:22,355 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 11:26:22,355 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 11:26:22,355 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 11:26:22,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:22" (1/1) ... [2021-12-14 11:26:22,379 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:22" (1/1) ... [2021-12-14 11:26:22,391 INFO L137 Inliner]: procedures = 15, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 105 [2021-12-14 11:26:22,392 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 11:26:22,392 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 11:26:22,392 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 11:26:22,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 11:26:22,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:22" (1/1) ... [2021-12-14 11:26:22,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:22" (1/1) ... [2021-12-14 11:26:22,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:22" (1/1) ... [2021-12-14 11:26:22,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:22" (1/1) ... [2021-12-14 11:26:22,408 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:22" (1/1) ... [2021-12-14 11:26:22,412 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:22" (1/1) ... [2021-12-14 11:26:22,413 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:22" (1/1) ... [2021-12-14 11:26:22,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 11:26:22,415 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 11:26:22,415 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 11:26:22,415 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 11:26:22,416 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:22" (1/1) ... [2021-12-14 11:26:22,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:26:22,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:26:22,455 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 11:26:22,461 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 11:26:22,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 11:26:22,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 11:26:22,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 11:26:22,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 11:26:22,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 11:26:22,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 11:26:22,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 11:26:22,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 11:26:22,540 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 11:26:22,541 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 11:26:22,664 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 11:26:22,668 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 11:26:22,668 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-12-14 11:26:22,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:26:22 BoogieIcfgContainer [2021-12-14 11:26:22,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 11:26:22,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 11:26:22,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 11:26:22,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 11:26:22,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:26:22" (1/3) ... [2021-12-14 11:26:22,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45ad409b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:26:22, skipping insertion in model container [2021-12-14 11:26:22,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:22" (2/3) ... [2021-12-14 11:26:22,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45ad409b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:26:22, skipping insertion in model container [2021-12-14 11:26:22,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:26:22" (3/3) ... [2021-12-14 11:26:22,676 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_m3.c [2021-12-14 11:26:22,679 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 11:26:22,679 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 11:26:22,744 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 11:26:22,748 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 11:26:22,749 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 11:26:22,791 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 states have internal predecessors, (47), 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 11:26:22,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-14 11:26:22,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:26:22,795 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:26:22,796 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:26:22,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:26:22,799 INFO L85 PathProgramCache]: Analyzing trace with hash 534528496, now seen corresponding path program 1 times [2021-12-14 11:26:22,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:26:22,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911451976] [2021-12-14 11:26:22,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:26:22,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:26:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:22,974 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 11:26:22,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:26:22,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911451976] [2021-12-14 11:26:22,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911451976] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:26:22,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:26:22,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 11:26:22,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128782748] [2021-12-14 11:26:22,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:26:22,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 11:26:22,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:26:23,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 11:26:23,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 11:26:23,032 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 states have internal predecessors, (47), 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 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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 11:26:23,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:26:23,064 INFO L93 Difference]: Finished difference Result 59 states and 86 transitions. [2021-12-14 11:26:23,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 11:26:23,067 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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 19 [2021-12-14 11:26:23,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:26:23,074 INFO L225 Difference]: With dead ends: 59 [2021-12-14 11:26:23,074 INFO L226 Difference]: Without dead ends: 27 [2021-12-14 11:26:23,077 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 11:26:23,081 INFO L933 BasicCegarLoop]: 39 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, 39 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 11:26:23,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:26:23,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-14 11:26:23,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-14 11:26:23,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:23,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-12-14 11:26:23,112 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 19 [2021-12-14 11:26:23,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:26:23,112 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-12-14 11:26:23,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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 11:26:23,113 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-12-14 11:26:23,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-14 11:26:23,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:26:23,114 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:26:23,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 11:26:23,115 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:26:23,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:26:23,119 INFO L85 PathProgramCache]: Analyzing trace with hash -697412484, now seen corresponding path program 1 times [2021-12-14 11:26:23,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:26:23,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601877094] [2021-12-14 11:26:23,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:26:23,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:26:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:23,215 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 11:26:23,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:26:23,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601877094] [2021-12-14 11:26:23,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601877094] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:26:23,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:26:23,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 11:26:23,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169901388] [2021-12-14 11:26:23,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:26:23,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 11:26:23,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:26:23,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 11:26:23,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 11:26:23,222 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 11:26:23,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:26:23,285 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2021-12-14 11:26:23,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 11:26:23,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 19 [2021-12-14 11:26:23,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:26:23,286 INFO L225 Difference]: With dead ends: 51 [2021-12-14 11:26:23,286 INFO L226 Difference]: Without dead ends: 29 [2021-12-14 11:26:23,286 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 11:26:23,287 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:26:23,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:26:23,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-14 11:26:23,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-12-14 11:26:23,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:23,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-12-14 11:26:23,304 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 19 [2021-12-14 11:26:23,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:26:23,320 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-12-14 11:26:23,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 11:26:23,323 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-12-14 11:26:23,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-14 11:26:23,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:26:23,325 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:26:23,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 11:26:23,326 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:26:23,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:26:23,327 INFO L85 PathProgramCache]: Analyzing trace with hash -506383970, now seen corresponding path program 1 times [2021-12-14 11:26:23,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:26:23,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785895581] [2021-12-14 11:26:23,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:26:23,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:26:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:23,421 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 11:26:23,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:26:23,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785895581] [2021-12-14 11:26:23,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785895581] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:26:23,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:26:23,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 11:26:23,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513211603] [2021-12-14 11:26:23,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:26:23,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 11:26:23,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:26:23,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 11:26:23,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 11:26:23,426 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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 11:26:23,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:26:23,521 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2021-12-14 11:26:23,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 11:26:23,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-14 11:26:23,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:26:23,522 INFO L225 Difference]: With dead ends: 59 [2021-12-14 11:26:23,522 INFO L226 Difference]: Without dead ends: 40 [2021-12-14 11:26:23,523 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 11:26:23,524 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:26:23,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 17 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:26:23,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-14 11:26:23,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-12-14 11:26:23,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 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 11:26:23,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-12-14 11:26:23,529 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 21 [2021-12-14 11:26:23,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:26:23,529 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-12-14 11:26:23,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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 11:26:23,530 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-12-14 11:26:23,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-14 11:26:23,530 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:26:23,530 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:26:23,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 11:26:23,531 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:26:23,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:26:23,531 INFO L85 PathProgramCache]: Analyzing trace with hash 615846698, now seen corresponding path program 1 times [2021-12-14 11:26:23,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:26:23,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346357715] [2021-12-14 11:26:23,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:26:23,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:26:23,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 11:26:23,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:26:23,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346357715] [2021-12-14 11:26:23,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346357715] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:26:23,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720658363] [2021-12-14 11:26:23,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:26:23,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:26:23,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:26:23,577 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 11:26:23,580 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 11:26:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:23,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 11:26:23,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:26:23,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 11:26:23,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:26:23,819 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 11:26:23,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720658363] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:26:23,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:26:23,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-14 11:26:23,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695120763] [2021-12-14 11:26:23,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:26:23,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 11:26:23,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:26:23,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 11:26:23,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-14 11:26:23,823 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 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 11:26:23,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:26:23,856 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2021-12-14 11:26:23,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 11:26:23,857 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 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) Word has length 33 [2021-12-14 11:26:23,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:26:23,858 INFO L225 Difference]: With dead ends: 65 [2021-12-14 11:26:23,858 INFO L226 Difference]: Without dead ends: 37 [2021-12-14 11:26:23,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 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 11:26:23,860 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:26:23,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 61 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:26:23,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-14 11:26:23,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-12-14 11:26:23,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 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 11:26:23,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-12-14 11:26:23,864 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 33 [2021-12-14 11:26:23,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:26:23,865 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-12-14 11:26:23,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 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 11:26:23,865 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-12-14 11:26:23,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-14 11:26:23,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:26:23,866 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:26:23,888 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 11:26:24,082 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 11:26:24,083 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:26:24,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:26:24,083 INFO L85 PathProgramCache]: Analyzing trace with hash -160084788, now seen corresponding path program 2 times [2021-12-14 11:26:24,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:26:24,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619801426] [2021-12-14 11:26:24,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:26:24,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:26:24,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 11:26:24,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:26:24,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619801426] [2021-12-14 11:26:24,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619801426] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:26:24,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354216020] [2021-12-14 11:26:24,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 11:26:24,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:26:24,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:26:24,142 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 11:26:24,185 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 11:26:24,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 11:26:24,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:26:24,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 11:26:24,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:26:24,282 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 11:26:24,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:26:24,367 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 11:26:24,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354216020] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:26:24,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:26:24,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-14 11:26:24,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636025495] [2021-12-14 11:26:24,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:26:24,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 11:26:24,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:26:24,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 11:26:24,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-14 11:26:24,386 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 11:26:24,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:26:24,483 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2021-12-14 11:26:24,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 11:26:24,483 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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) Word has length 35 [2021-12-14 11:26:24,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:26:24,484 INFO L225 Difference]: With dead ends: 78 [2021-12-14 11:26:24,484 INFO L226 Difference]: Without dead ends: 54 [2021-12-14 11:26:24,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 65 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 11:26:24,486 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 55 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:26:24,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 25 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:26:24,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-14 11:26:24,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2021-12-14 11:26:24,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 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 11:26:24,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-12-14 11:26:24,492 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 35 [2021-12-14 11:26:24,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:26:24,492 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-12-14 11:26:24,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 11:26:24,492 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-12-14 11:26:24,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-14 11:26:24,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:26:24,493 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1] [2021-12-14 11:26:24,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 11:26:24,707 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 11:26:24,708 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:26:24,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:26:24,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1337652904, now seen corresponding path program 3 times [2021-12-14 11:26:24,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:26:24,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541233488] [2021-12-14 11:26:24,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:26:24,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:26:24,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:26,566 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:26:26,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:26:26,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541233488] [2021-12-14 11:26:26,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541233488] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:26:26,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986412115] [2021-12-14 11:26:26,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 11:26:26,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:26:26,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:26:26,576 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 11:26:26,577 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 11:26:26,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-14 11:26:26,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:26:26,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-14 11:26:26,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:26:30,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 11:26:30,468 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 11:26:30,728 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:26:30,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:26:40,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 11:26:40,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 103 [2021-12-14 11:26:41,282 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:26:41,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986412115] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:26:41,282 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:26:41,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 37, 37] total 96 [2021-12-14 11:26:41,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931795302] [2021-12-14 11:26:41,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:26:41,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-12-14 11:26:41,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:26:41,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-12-14 11:26:41,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=8553, Unknown=0, NotChecked=0, Total=9120 [2021-12-14 11:26:41,286 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 96 states, 96 states have (on average 1.3854166666666667) internal successors, (133), 96 states have internal predecessors, (133), 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 11:26:46,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:26:46,116 INFO L93 Difference]: Finished difference Result 126 states and 144 transitions. [2021-12-14 11:26:46,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-14 11:26:46,117 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.3854166666666667) internal successors, (133), 96 states have internal predecessors, (133), 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 11:26:46,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:26:46,118 INFO L225 Difference]: With dead ends: 126 [2021-12-14 11:26:46,118 INFO L226 Difference]: Without dead ends: 120 [2021-12-14 11:26:46,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 25 SyntacticMatches, 15 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5736 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=1058, Invalid=18402, Unknown=0, NotChecked=0, Total=19460 [2021-12-14 11:26:46,123 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 785 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 11:26:46,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 190 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 450 Invalid, 0 Unknown, 785 Unchecked, 0.2s Time] [2021-12-14 11:26:46,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-14 11:26:46,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 77. [2021-12-14 11:26:46,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 76 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 11:26:46,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2021-12-14 11:26:46,132 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 47 [2021-12-14 11:26:46,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:26:46,132 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2021-12-14 11:26:46,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.3854166666666667) internal successors, (133), 96 states have internal predecessors, (133), 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 11:26:46,132 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2021-12-14 11:26:46,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-14 11:26:46,133 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:26:46,133 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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, 1, 1, 1, 1] [2021-12-14 11:26:46,158 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 11:26:46,349 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 11:26:46,350 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:26:46,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:26:46,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1235984134, now seen corresponding path program 4 times [2021-12-14 11:26:46,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:26:46,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098399070] [2021-12-14 11:26:46,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:26:46,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:26:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:46,439 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-14 11:26:46,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:26:46,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098399070] [2021-12-14 11:26:46,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098399070] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:26:46,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180866229] [2021-12-14 11:26:46,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 11:26:46,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:26:46,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:26:46,444 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 11:26:46,446 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 11:26:46,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 11:26:46,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:26:46,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 11:26:46,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:26:46,618 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-14 11:26:46,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:26:46,711 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-14 11:26:46,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180866229] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:26:46,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:26:46,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-14 11:26:46,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228407833] [2021-12-14 11:26:46,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:26:46,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 11:26:46,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:26:46,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 11:26:46,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-12-14 11:26:46,714 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 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 11:26:46,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:26:46,904 INFO L93 Difference]: Finished difference Result 152 states and 174 transitions. [2021-12-14 11:26:46,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 11:26:46,905 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 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 11:26:46,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:26:46,906 INFO L225 Difference]: With dead ends: 152 [2021-12-14 11:26:46,906 INFO L226 Difference]: Without dead ends: 80 [2021-12-14 11:26:46,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 93 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 11:26:46,906 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 61 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:26:46,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 87 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:26:46,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-14 11:26:46,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-12-14 11:26:46,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 78 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 11:26:46,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2021-12-14 11:26:46,913 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 49 [2021-12-14 11:26:46,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:26:46,913 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2021-12-14 11:26:46,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 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 11:26:46,913 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2021-12-14 11:26:46,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-14 11:26:46,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:26:46,914 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1] [2021-12-14 11:26:46,935 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 11:26:47,119 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 11:26:47,120 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:26:47,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:26:47,120 INFO L85 PathProgramCache]: Analyzing trace with hash -436136292, now seen corresponding path program 5 times [2021-12-14 11:26:47,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:26:47,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607965705] [2021-12-14 11:26:47,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:26:47,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:26:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:47,187 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-14 11:26:47,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:26:47,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607965705] [2021-12-14 11:26:47,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607965705] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:26:47,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853145312] [2021-12-14 11:26:47,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 11:26:47,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:26:47,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:26:47,189 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 11:26:47,207 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 11:26:47,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-14 11:26:47,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:26:47,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 11:26:47,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:26:47,370 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-14 11:26:47,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:26:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-14 11:26:47,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853145312] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:26:47,451 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:26:47,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-14 11:26:47,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22639865] [2021-12-14 11:26:47,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:26:47,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 11:26:47,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:26:47,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 11:26:47,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-14 11:26:47,452 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 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 11:26:47,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:26:47,597 INFO L93 Difference]: Finished difference Result 125 states and 145 transitions. [2021-12-14 11:26:47,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 11:26:47,598 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 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 51 [2021-12-14 11:26:47,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:26:47,599 INFO L225 Difference]: With dead ends: 125 [2021-12-14 11:26:47,599 INFO L226 Difference]: Without dead ends: 68 [2021-12-14 11:26:47,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 95 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 11:26:47,600 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 112 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:26:47,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 37 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:26:47,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-14 11:26:47,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2021-12-14 11:26:47,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 61 states have internal predecessors, (68), 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 11:26:47,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-12-14 11:26:47,605 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 51 [2021-12-14 11:26:47,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:26:47,605 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-12-14 11:26:47,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 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 11:26:47,606 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-12-14 11:26:47,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-14 11:26:47,606 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:26:47,606 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1] [2021-12-14 11:26:47,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 11:26:47,811 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 11:26:47,812 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:26:47,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:26:47,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1781065978, now seen corresponding path program 6 times [2021-12-14 11:26:47,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:26:47,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453977306] [2021-12-14 11:26:47,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:26:47,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:26:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:50,220 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:26:50,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:26:50,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453977306] [2021-12-14 11:26:50,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453977306] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:26:50,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115301929] [2021-12-14 11:26:50,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 11:26:50,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:26:50,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:26:50,222 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 11:26:50,223 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 11:26:50,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-14 11:26:50,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:26:50,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-14 11:26:50,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:26:52,040 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 11:26:52,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:26:54,995 INFO L354 Elim1Store]: treesize reduction 114, result has 46.0 percent of original size [2021-12-14 11:26:54,996 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 11:26:55,190 INFO L354 Elim1Store]: treesize reduction 198, result has 6.2 percent of original size [2021-12-14 11:26:55,191 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 11:26:55,259 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 11:26:55,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115301929] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:26:55,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:26:55,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 38, 37] total 100 [2021-12-14 11:26:55,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868879075] [2021-12-14 11:26:55,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:26:55,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-12-14 11:26:55,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:26:55,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-12-14 11:26:55,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=9535, Unknown=0, NotChecked=0, Total=9900 [2021-12-14 11:26:55,263 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 100 states, 100 states have (on average 1.47) internal successors, (147), 100 states have internal predecessors, (147), 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 11:27:05,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:27:05,417 INFO L93 Difference]: Finished difference Result 181 states and 200 transitions. [2021-12-14 11:27:05,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-14 11:27:05,418 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.47) internal successors, (147), 100 states have internal predecessors, (147), 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 61 [2021-12-14 11:27:05,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:27:05,419 INFO L225 Difference]: With dead ends: 181 [2021-12-14 11:27:05,419 INFO L226 Difference]: Without dead ends: 177 [2021-12-14 11:27:05,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 54 SyntacticMatches, 17 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=1334, Invalid=24426, Unknown=0, NotChecked=0, Total=25760 [2021-12-14 11:27:05,428 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 90 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 4552 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 5016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 4552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-14 11:27:05,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 222 Invalid, 5016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 4552 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-14 11:27:05,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-14 11:27:05,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 91. [2021-12-14 11:27:05,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1222222222222222) internal successors, (101), 90 states have internal predecessors, (101), 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 11:27:05,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2021-12-14 11:27:05,444 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 61 [2021-12-14 11:27:05,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:27:05,444 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2021-12-14 11:27:05,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.47) internal successors, (147), 100 states have internal predecessors, (147), 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 11:27:05,444 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2021-12-14 11:27:05,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-14 11:27:05,445 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:27:05,445 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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, 1, 1, 1, 1] [2021-12-14 11:27:05,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 11:27:05,654 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 11:27:05,654 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:27:05,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:27:05,655 INFO L85 PathProgramCache]: Analyzing trace with hash 2140781352, now seen corresponding path program 7 times [2021-12-14 11:27:05,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:27:05,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825930320] [2021-12-14 11:27:05,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:27:05,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:27:05,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:27:05,774 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-14 11:27:05,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:27:05,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825930320] [2021-12-14 11:27:05,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825930320] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:27:05,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863871036] [2021-12-14 11:27:05,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 11:27:05,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:27:05,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:27:05,776 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 11:27:05,778 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 11:27:05,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:27:05,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-14 11:27:05,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:27:05,996 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-14 11:27:05,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:27:06,100 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-14 11:27:06,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863871036] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:27:06,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:27:06,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-14 11:27:06,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347997267] [2021-12-14 11:27:06,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:27:06,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-14 11:27:06,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:27:06,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-14 11:27:06,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-12-14 11:27:06,101 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 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 11:27:06,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:27:06,281 INFO L93 Difference]: Finished difference Result 217 states and 242 transitions. [2021-12-14 11:27:06,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 11:27:06,281 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 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 63 [2021-12-14 11:27:06,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:27:06,282 INFO L225 Difference]: With dead ends: 217 [2021-12-14 11:27:06,282 INFO L226 Difference]: Without dead ends: 94 [2021-12-14 11:27:06,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 120 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 11:27:06,283 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 72 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:27:06,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 87 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:27:06,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-14 11:27:06,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-12-14 11:27:06,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.1195652173913044) internal successors, (103), 92 states have internal predecessors, (103), 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 11:27:06,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2021-12-14 11:27:06,291 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 63 [2021-12-14 11:27:06,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:27:06,291 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2021-12-14 11:27:06,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 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 11:27:06,292 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2021-12-14 11:27:06,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 11:27:06,292 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:27:06,292 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1] [2021-12-14 11:27:06,312 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 11:27:06,497 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 11:27:06,498 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:27:06,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:27:06,498 INFO L85 PathProgramCache]: Analyzing trace with hash -784405174, now seen corresponding path program 8 times [2021-12-14 11:27:06,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:27:06,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805362340] [2021-12-14 11:27:06,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:27:06,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:27:06,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:27:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-14 11:27:06,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:27:06,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805362340] [2021-12-14 11:27:06,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805362340] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:27:06,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221216253] [2021-12-14 11:27:06,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 11:27:06,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:27:06,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:27:06,582 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 11:27:06,584 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 11:27:06,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 11:27:06,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:27:06,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-14 11:27:06,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:27:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-14 11:27:06,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:27:06,865 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-14 11:27:06,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221216253] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:27:06,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:27:06,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-14 11:27:06,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038384957] [2021-12-14 11:27:06,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:27:06,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-14 11:27:06,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:27:06,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-14 11:27:06,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 11:27:06,868 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 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 11:27:07,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:27:07,038 INFO L93 Difference]: Finished difference Result 155 states and 175 transitions. [2021-12-14 11:27:07,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 11:27:07,039 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 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 65 [2021-12-14 11:27:07,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:27:07,040 INFO L225 Difference]: With dead ends: 155 [2021-12-14 11:27:07,040 INFO L226 Difference]: Without dead ends: 82 [2021-12-14 11:27:07,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 122 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 11:27:07,042 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 155 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:27:07,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 28 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:27:07,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-14 11:27:07,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2021-12-14 11:27:07,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0933333333333333) internal successors, (82), 75 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:27:07,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2021-12-14 11:27:07,052 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 65 [2021-12-14 11:27:07,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:27:07,052 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2021-12-14 11:27:07,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 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 11:27:07,052 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2021-12-14 11:27:07,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-14 11:27:07,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:27:07,052 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1] [2021-12-14 11:27:07,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-14 11:27:07,271 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 11:27:07,271 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:27:07,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:27:07,273 INFO L85 PathProgramCache]: Analyzing trace with hash 958143540, now seen corresponding path program 9 times [2021-12-14 11:27:07,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:27:07,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498424316] [2021-12-14 11:27:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:27:07,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:27:07,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:27:10,897 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:27:10,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:27:10,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498424316] [2021-12-14 11:27:10,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498424316] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:27:10,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287886042] [2021-12-14 11:27:10,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 11:27:10,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:27:10,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:27:10,898 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 11:27:10,899 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 11:27:10,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-14 11:27:10,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:27:10,967 WARN L261 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 116 conjunts are in the unsatisfiable core [2021-12-14 11:27:10,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:27:11,054 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 11:27:21,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:27:21,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:27:21,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 11:27:21,704 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 11:27:21,705 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 11:27:22,184 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 96 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 11:27:22,184 INFO L328 TraceCheckSpWp]: Computing backward predicates...