./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3dbbec33 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_sum4.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 ca2dcd06e0389cf665904adfee9ccd6a1a268c87541d3b3b3e0bcffb3a75664e --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 10:01:54,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 10:01:54,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 10:01:54,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 10:01:54,153 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 10:01:54,156 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 10:01:54,157 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 10:01:54,160 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 10:01:54,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 10:01:54,166 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 10:01:54,167 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 10:01:54,168 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 10:01:54,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 10:01:54,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 10:01:54,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 10:01:54,173 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 10:01:54,174 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 10:01:54,175 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 10:01:54,177 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 10:01:54,182 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 10:01:54,183 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 10:01:54,183 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 10:01:54,185 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 10:01:54,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 10:01:54,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 10:01:54,194 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 10:01:54,194 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 10:01:54,195 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 10:01:54,196 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 10:01:54,196 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 10:01:54,197 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 10:01:54,198 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 10:01:54,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 10:01:54,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 10:01:54,201 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 10:01:54,202 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 10:01:54,202 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 10:01:54,202 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 10:01:54,203 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 10:01:54,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 10:01:54,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 10:01:54,206 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 10:01:54,233 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 10:01:54,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 10:01:54,234 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 10:01:54,234 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 10:01:54,235 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 10:01:54,235 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 10:01:54,235 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 10:01:54,235 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 10:01:54,236 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 10:01:54,236 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 10:01:54,236 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 10:01:54,237 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 10:01:54,237 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 10:01:54,237 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 10:01:54,237 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 10:01:54,237 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 10:01:54,237 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 10:01:54,238 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 10:01:54,238 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 10:01:54,238 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 10:01:54,238 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 10:01:54,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 10:01:54,239 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 10:01:54,239 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 10:01:54,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 10:01:54,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 10:01:54,239 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 10:01:54,239 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 10:01:54,240 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 10:01:54,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 10:01:54,240 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 10:01:54,240 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 10:01:54,240 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 10:01:54,241 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 10:01:54,241 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 10:01:54,241 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca2dcd06e0389cf665904adfee9ccd6a1a268c87541d3b3b3e0bcffb3a75664e [2023-02-14 10:01:54,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 10:01:54,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 10:01:54,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 10:01:54,520 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 10:01:54,520 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 10:01:54,521 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum4.c [2023-02-14 10:01:55,628 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 10:01:55,770 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 10:01:55,771 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum4.c [2023-02-14 10:01:55,775 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da833b581/f604560d0e47491b9dbffda8fb8269ff/FLAG4d864439c [2023-02-14 10:01:55,792 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da833b581/f604560d0e47491b9dbffda8fb8269ff [2023-02-14 10:01:55,794 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 10:01:55,795 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 10:01:55,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 10:01:55,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 10:01:55,799 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 10:01:55,800 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:01:55" (1/1) ... [2023-02-14 10:01:55,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28ecbbd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:01:55, skipping insertion in model container [2023-02-14 10:01:55,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:01:55" (1/1) ... [2023-02-14 10:01:55,807 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 10:01:55,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 10:01:55,936 WARN L237 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_sum4.c[400,413] [2023-02-14 10:01:55,954 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 10:01:55,961 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 10:01:55,972 WARN L237 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_sum4.c[400,413] [2023-02-14 10:01:55,980 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 10:01:55,992 INFO L208 MainTranslator]: Completed translation [2023-02-14 10:01:55,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:01:55 WrapperNode [2023-02-14 10:01:55,992 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 10:01:55,994 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 10:01:55,994 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 10:01:55,994 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 10:01:56,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:01:55" (1/1) ... [2023-02-14 10:01:56,007 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:01:55" (1/1) ... [2023-02-14 10:01:56,024 INFO L138 Inliner]: procedures = 15, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 127 [2023-02-14 10:01:56,025 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 10:01:56,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 10:01:56,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 10:01:56,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 10:01:56,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:01:55" (1/1) ... [2023-02-14 10:01:56,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:01:55" (1/1) ... [2023-02-14 10:01:56,036 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:01:55" (1/1) ... [2023-02-14 10:01:56,036 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:01:55" (1/1) ... [2023-02-14 10:01:56,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:01:55" (1/1) ... [2023-02-14 10:01:56,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:01:55" (1/1) ... [2023-02-14 10:01:56,045 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:01:55" (1/1) ... [2023-02-14 10:01:56,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:01:55" (1/1) ... [2023-02-14 10:01:56,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 10:01:56,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 10:01:56,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 10:01:56,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 10:01:56,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:01:55" (1/1) ... [2023-02-14 10:01:56,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 10:01:56,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:01:56,078 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) [2023-02-14 10:01:56,103 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 [2023-02-14 10:01:56,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 10:01:56,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 10:01:56,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-14 10:01:56,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 10:01:56,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 10:01:56,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 10:01:56,120 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 10:01:56,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 10:01:56,202 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 10:01:56,203 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 10:01:56,363 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 10:01:56,369 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 10:01:56,369 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2023-02-14 10:01:56,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:01:56 BoogieIcfgContainer [2023-02-14 10:01:56,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 10:01:56,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 10:01:56,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 10:01:56,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 10:01:56,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:01:55" (1/3) ... [2023-02-14 10:01:56,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa3bd75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:01:56, skipping insertion in model container [2023-02-14 10:01:56,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:01:55" (2/3) ... [2023-02-14 10:01:56,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa3bd75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:01:56, skipping insertion in model container [2023-02-14 10:01:56,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:01:56" (3/3) ... [2023-02-14 10:01:56,379 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum4.c [2023-02-14 10:01:56,397 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 10:01:56,397 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 10:01:56,485 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 10:01:56,491 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2a8eda5f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 10:01:56,491 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 10:01:56,510 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 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) [2023-02-14 10:01:56,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-14 10:01:56,516 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:01:56,517 INFO L195 NwaCegarLoop]: 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] [2023-02-14 10:01:56,518 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:01:56,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:01:56,540 INFO L85 PathProgramCache]: Analyzing trace with hash -2094998668, now seen corresponding path program 1 times [2023-02-14 10:01:56,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:01:56,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432547495] [2023-02-14 10:01:56,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:01:56,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:01:56,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:01:56,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:01:56,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:01:56,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432547495] [2023-02-14 10:01:56,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432547495] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:01:56,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:01:56,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 10:01:56,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793817658] [2023-02-14 10:01:56,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:01:56,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 10:01:56,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:01:56,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 10:01:56,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 10:01:56,795 INFO L87 Difference]: Start difference. First operand has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 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) Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 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) [2023-02-14 10:01:56,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:01:56,820 INFO L93 Difference]: Finished difference Result 71 states and 106 transitions. [2023-02-14 10:01:56,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 10:01:56,822 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-14 10:01:56,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:01:56,842 INFO L225 Difference]: With dead ends: 71 [2023-02-14 10:01:56,843 INFO L226 Difference]: Without dead ends: 33 [2023-02-14 10:01:56,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 10:01:56,851 INFO L413 NwaCegarLoop]: 47 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, 47 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 [2023-02-14 10:01:56,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:01:56,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-14 10:01:56,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-02-14 10:01:56,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:01:56,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2023-02-14 10:01:56,887 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 23 [2023-02-14 10:01:56,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:01:56,888 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2023-02-14 10:01:56,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 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) [2023-02-14 10:01:56,889 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2023-02-14 10:01:56,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-14 10:01:56,890 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:01:56,890 INFO L195 NwaCegarLoop]: 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] [2023-02-14 10:01:56,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 10:01:56,890 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:01:56,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:01:56,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1680934388, now seen corresponding path program 1 times [2023-02-14 10:01:56,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:01:56,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317689139] [2023-02-14 10:01:56,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:01:56,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:01:56,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:01:57,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:01:57,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:01:57,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317689139] [2023-02-14 10:01:57,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317689139] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:01:57,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:01:57,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 10:01:57,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152131439] [2023-02-14 10:01:57,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:01:57,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 10:01:57,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:01:57,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 10:01:57,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 10:01:57,075 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2023-02-14 10:01:57,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:01:57,136 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2023-02-14 10:01:57,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 10:01:57,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-14 10:01:57,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:01:57,138 INFO L225 Difference]: With dead ends: 63 [2023-02-14 10:01:57,139 INFO L226 Difference]: Without dead ends: 35 [2023-02-14 10:01:57,139 INFO L412 NwaCegarLoop]: 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 [2023-02-14 10:01:57,141 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:01:57,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:01:57,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-14 10:01:57,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2023-02-14 10:01:57,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 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) [2023-02-14 10:01:57,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-02-14 10:01:57,151 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 23 [2023-02-14 10:01:57,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:01:57,152 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-02-14 10:01:57,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2023-02-14 10:01:57,153 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-02-14 10:01:57,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-14 10:01:57,154 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:01:57,154 INFO L195 NwaCegarLoop]: 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] [2023-02-14 10:01:57,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 10:01:57,155 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:01:57,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:01:57,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1381660206, now seen corresponding path program 1 times [2023-02-14 10:01:57,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:01:57,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363668031] [2023-02-14 10:01:57,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:01:57,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:01:57,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:01:57,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 10:01:57,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:01:57,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363668031] [2023-02-14 10:01:57,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363668031] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:01:57,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:01:57,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 10:01:57,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532484411] [2023-02-14 10:01:57,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:01:57,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 10:01:57,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:01:57,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 10:01:57,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 10:01:57,262 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:01:57,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:01:57,373 INFO L93 Difference]: Finished difference Result 75 states and 97 transitions. [2023-02-14 10:01:57,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 10:01:57,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-14 10:01:57,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:01:57,375 INFO L225 Difference]: With dead ends: 75 [2023-02-14 10:01:57,375 INFO L226 Difference]: Without dead ends: 50 [2023-02-14 10:01:57,376 INFO L412 NwaCegarLoop]: 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 [2023-02-14 10:01:57,377 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 58 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:01:57,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 19 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:01:57,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-14 10:01:57,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2023-02-14 10:01:57,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:01:57,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2023-02-14 10:01:57,385 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 25 [2023-02-14 10:01:57,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:01:57,385 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2023-02-14 10:01:57,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:01:57,386 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2023-02-14 10:01:57,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-14 10:01:57,386 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:01:57,386 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:01:57,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 10:01:57,387 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:01:57,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:01:57,387 INFO L85 PathProgramCache]: Analyzing trace with hash -158323138, now seen corresponding path program 1 times [2023-02-14 10:01:57,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:01:57,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123030740] [2023-02-14 10:01:57,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:01:57,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:01:57,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:01:57,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 10:01:57,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:01:57,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123030740] [2023-02-14 10:01:57,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123030740] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:01:57,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888290554] [2023-02-14 10:01:57,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:01:57,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:01:57,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:01:57,485 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) [2023-02-14 10:01:57,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 10:01:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:01:57,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 10:01:57,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:01:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 10:01:57,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:01:57,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 10:01:57,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888290554] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:01:57,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:01:57,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-14 10:01:57,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417124929] [2023-02-14 10:01:57,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:01:57,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 10:01:57,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:01:57,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 10:01:57,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-02-14 10:01:57,741 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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) [2023-02-14 10:01:57,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:01:57,803 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2023-02-14 10:01:57,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 10:01:57,806 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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 41 [2023-02-14 10:01:57,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:01:57,807 INFO L225 Difference]: With dead ends: 81 [2023-02-14 10:01:57,807 INFO L226 Difference]: Without dead ends: 45 [2023-02-14 10:01:57,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-02-14 10:01:57,809 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:01:57,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 77 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:01:57,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-02-14 10:01:57,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2023-02-14 10:01:57,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 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) [2023-02-14 10:01:57,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2023-02-14 10:01:57,819 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 41 [2023-02-14 10:01:57,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:01:57,820 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2023-02-14 10:01:57,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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) [2023-02-14 10:01:57,820 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2023-02-14 10:01:57,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 10:01:57,821 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:01:57,822 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:01:57,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-14 10:01:58,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:01:58,031 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:01:58,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:01:58,032 INFO L85 PathProgramCache]: Analyzing trace with hash 408266208, now seen corresponding path program 2 times [2023-02-14 10:01:58,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:01:58,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013465241] [2023-02-14 10:01:58,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:01:58,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:01:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:01:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-14 10:01:58,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:01:58,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013465241] [2023-02-14 10:01:58,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013465241] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:01:58,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434047159] [2023-02-14 10:01:58,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 10:01:58,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:01:58,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:01:58,124 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) [2023-02-14 10:01:58,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 10:01:58,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 10:01:58,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:01:58,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 10:01:58,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:01:58,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-14 10:01:58,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:01:58,357 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-14 10:01:58,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434047159] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:01:58,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:01:58,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-02-14 10:01:58,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034998852] [2023-02-14 10:01:58,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:01:58,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-14 10:01:58,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:01:58,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-14 10:01:58,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-02-14 10:01:58,362 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 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) [2023-02-14 10:01:58,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:01:58,514 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2023-02-14 10:01:58,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 10:01:58,515 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 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 43 [2023-02-14 10:01:58,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:01:58,515 INFO L225 Difference]: With dead ends: 100 [2023-02-14 10:01:58,516 INFO L226 Difference]: Without dead ends: 68 [2023-02-14 10:01:58,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2023-02-14 10:01:58,517 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:01:58,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 27 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:01:58,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-14 10:01:58,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2023-02-14 10:01:58,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 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) [2023-02-14 10:01:58,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2023-02-14 10:01:58,525 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 43 [2023-02-14 10:01:58,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:01:58,525 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2023-02-14 10:01:58,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 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) [2023-02-14 10:01:58,525 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2023-02-14 10:01:58,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-14 10:01:58,527 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:01:58,527 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1] [2023-02-14 10:01:58,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 10:01:58,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:01:58,742 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:01:58,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:01:58,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1004340752, now seen corresponding path program 3 times [2023-02-14 10:01:58,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:01:58,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598476125] [2023-02-14 10:01:58,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:01:58,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:01:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:02:02,208 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:02:02,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:02:02,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598476125] [2023-02-14 10:02:02,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598476125] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:02:02,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190366814] [2023-02-14 10:02:02,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 10:02:02,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:02:02,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:02:02,213 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) [2023-02-14 10:02:02,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 10:02:02,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 10:02:02,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:02:02,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 86 conjunts are in the unsatisfiable core [2023-02-14 10:02:02,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:02:03,971 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:02:03,972 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 16 [2023-02-14 10:02:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:02:04,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:02:09,152 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:02:09,155 INFO L350 Elim1Store]: Elim1 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 37 treesize of output 76 [2023-02-14 10:02:09,486 INFO L321 Elim1Store]: treesize reduction 58, result has 13.4 percent of original size [2023-02-14 10:02:09,486 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 17 [2023-02-14 10:02:09,949 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:02:09,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190366814] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:02:09,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:02:09,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27, 29] total 65 [2023-02-14 10:02:09,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850550832] [2023-02-14 10:02:09,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:02:09,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-02-14 10:02:09,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:02:09,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-02-14 10:02:09,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=3745, Unknown=0, NotChecked=0, Total=4160 [2023-02-14 10:02:09,955 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 65 states, 65 states have (on average 2.6) internal successors, (169), 65 states have internal predecessors, (169), 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) [2023-02-14 10:02:16,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:02:16,537 INFO L93 Difference]: Finished difference Result 169 states and 193 transitions. [2023-02-14 10:02:16,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-14 10:02:16,538 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.6) internal successors, (169), 65 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-14 10:02:16,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:02:16,539 INFO L225 Difference]: With dead ends: 169 [2023-02-14 10:02:16,539 INFO L226 Difference]: Without dead ends: 163 [2023-02-14 10:02:16,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 68 SyntacticMatches, 33 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 3154 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=805, Invalid=6851, Unknown=0, NotChecked=0, Total=7656 [2023-02-14 10:02:16,543 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 113 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 1717 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-14 10:02:16,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 133 Invalid, 1863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1717 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-02-14 10:02:16,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-02-14 10:02:16,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 101. [2023-02-14 10:02:16,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.16) internal successors, (116), 100 states have internal predecessors, (116), 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) [2023-02-14 10:02:16,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2023-02-14 10:02:16,560 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 59 [2023-02-14 10:02:16,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:02:16,561 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2023-02-14 10:02:16,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.6) internal successors, (169), 65 states have internal predecessors, (169), 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) [2023-02-14 10:02:16,561 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2023-02-14 10:02:16,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-02-14 10:02:16,562 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:02:16,563 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 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, 1, 1, 1, 1] [2023-02-14 10:02:16,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 10:02:16,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:02:16,769 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:02:16,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:02:16,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1580077422, now seen corresponding path program 4 times [2023-02-14 10:02:16,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:02:16,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832530217] [2023-02-14 10:02:16,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:02:16,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:02:16,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:02:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-14 10:02:16,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:02:16,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832530217] [2023-02-14 10:02:16,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832530217] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:02:16,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600488835] [2023-02-14 10:02:16,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 10:02:16,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:02:16,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:02:16,913 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) [2023-02-14 10:02:16,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 10:02:16,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 10:02:16,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:02:16,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 10:02:16,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:02:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-14 10:02:17,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:02:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-14 10:02:17,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600488835] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:02:17,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:02:17,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-02-14 10:02:17,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605613297] [2023-02-14 10:02:17,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:02:17,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-14 10:02:17,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:02:17,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-14 10:02:17,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-02-14 10:02:17,178 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 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) [2023-02-14 10:02:17,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:02:17,593 INFO L93 Difference]: Finished difference Result 274 states and 315 transitions. [2023-02-14 10:02:17,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-14 10:02:17,594 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 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 61 [2023-02-14 10:02:17,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:02:17,595 INFO L225 Difference]: With dead ends: 274 [2023-02-14 10:02:17,595 INFO L226 Difference]: Without dead ends: 136 [2023-02-14 10:02:17,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 109 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2023-02-14 10:02:17,597 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 264 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 10:02:17,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 65 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 10:02:17,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-14 10:02:17,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 112. [2023-02-14 10:02:17,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.135135135135135) internal successors, (126), 111 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:02:17,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2023-02-14 10:02:17,615 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 61 [2023-02-14 10:02:17,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:02:17,616 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2023-02-14 10:02:17,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 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) [2023-02-14 10:02:17,616 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2023-02-14 10:02:17,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-14 10:02:17,617 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:02:17,618 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1] [2023-02-14 10:02:17,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 10:02:17,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:02:17,819 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:02:17,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:02:17,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1506179060, now seen corresponding path program 5 times [2023-02-14 10:02:17,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:02:17,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851486091] [2023-02-14 10:02:17,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:02:17,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:02:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:02:17,932 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-14 10:02:17,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:02:17,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851486091] [2023-02-14 10:02:17,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851486091] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:02:17,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326384698] [2023-02-14 10:02:17,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 10:02:17,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:02:17,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:02:17,934 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) [2023-02-14 10:02:17,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 10:02:18,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-14 10:02:18,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:02:18,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 10:02:18,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:02:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-14 10:02:18,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:02:18,209 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-14 10:02:18,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326384698] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:02:18,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:02:18,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-14 10:02:18,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236175319] [2023-02-14 10:02:18,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:02:18,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 10:02:18,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:02:18,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 10:02:18,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-02-14 10:02:18,212 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:02:18,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:02:18,404 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2023-02-14 10:02:18,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 10:02:18,404 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-14 10:02:18,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:02:18,405 INFO L225 Difference]: With dead ends: 126 [2023-02-14 10:02:18,405 INFO L226 Difference]: Without dead ends: 86 [2023-02-14 10:02:18,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 115 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-14 10:02:18,406 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 155 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:02:18,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 39 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:02:18,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-14 10:02:18,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2023-02-14 10:02:18,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 77 states have internal predecessors, (86), 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) [2023-02-14 10:02:18,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2023-02-14 10:02:18,415 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 63 [2023-02-14 10:02:18,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:02:18,416 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2023-02-14 10:02:18,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:02:18,416 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2023-02-14 10:02:18,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-02-14 10:02:18,421 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:02:18,422 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1] [2023-02-14 10:02:18,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 10:02:18,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:02:18,627 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:02:18,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:02:18,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1152417058, now seen corresponding path program 6 times [2023-02-14 10:02:18,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:02:18,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659868814] [2023-02-14 10:02:18,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:02:18,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:02:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:02:23,541 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:02:23,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:02:23,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659868814] [2023-02-14 10:02:23,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659868814] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:02:23,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199130948] [2023-02-14 10:02:23,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 10:02:23,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:02:23,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:02:23,545 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) [2023-02-14 10:02:23,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 10:02:23,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-14 10:02:23,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:02:23,621 WARN L261 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 118 conjunts are in the unsatisfiable core [2023-02-14 10:02:23,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:02:23,659 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 10:02:25,739 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:02:25,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:02:50,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 80 [2023-02-14 10:02:50,327 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:02:50,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 189 [2023-02-14 10:02:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:02:50,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199130948] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:02:50,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:02:50,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 45, 44] total 116 [2023-02-14 10:02:50,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014219054] [2023-02-14 10:02:50,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:02:50,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2023-02-14 10:02:50,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:02:50,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2023-02-14 10:02:50,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=907, Invalid=12425, Unknown=8, NotChecked=0, Total=13340 [2023-02-14 10:02:50,762 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 116 states, 116 states have (on average 1.7758620689655173) internal successors, (206), 116 states have internal predecessors, (206), 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) [2023-02-14 10:02:58,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:02:58,224 INFO L93 Difference]: Finished difference Result 184 states and 209 transitions. [2023-02-14 10:02:58,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-14 10:02:58,226 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.7758620689655173) internal successors, (206), 116 states have internal predecessors, (206), 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 77 [2023-02-14 10:02:58,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:02:58,226 INFO L225 Difference]: With dead ends: 184 [2023-02-14 10:02:58,227 INFO L226 Difference]: Without dead ends: 84 [2023-02-14 10:02:58,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 80 SyntacticMatches, 19 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8794 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=1648, Invalid=18366, Unknown=8, NotChecked=0, Total=20022 [2023-02-14 10:02:58,231 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 221 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 5777 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 6248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 5777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-02-14 10:02:58,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 242 Invalid, 6248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 5777 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-02-14 10:02:58,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-02-14 10:02:58,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2023-02-14 10:02:58,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1111111111111112) internal successors, (90), 81 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) [2023-02-14 10:02:58,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2023-02-14 10:02:58,238 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 77 [2023-02-14 10:02:58,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:02:58,238 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2023-02-14 10:02:58,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.7758620689655173) internal successors, (206), 116 states have internal predecessors, (206), 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) [2023-02-14 10:02:58,239 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2023-02-14 10:02:58,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-02-14 10:02:58,240 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:02:58,240 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1] [2023-02-14 10:02:58,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 10:02:58,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:02:58,445 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:02:58,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:02:58,446 INFO L85 PathProgramCache]: Analyzing trace with hash 385815078, now seen corresponding path program 7 times [2023-02-14 10:02:58,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:02:58,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920265013] [2023-02-14 10:02:58,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:02:58,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:02:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:02:58,601 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-02-14 10:02:58,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:02:58,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920265013] [2023-02-14 10:02:58,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920265013] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:02:58,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380178158] [2023-02-14 10:02:58,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 10:02:58,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:02:58,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:02:58,604 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) [2023-02-14 10:02:58,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 10:02:58,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:02:58,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 10:02:58,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:02:58,782 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-02-14 10:02:58,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:02:58,863 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-02-14 10:02:58,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380178158] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:02:58,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:02:58,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-02-14 10:02:58,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001518926] [2023-02-14 10:02:58,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:02:58,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-14 10:02:58,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:02:58,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-14 10:02:58,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-02-14 10:02:58,865 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 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) [2023-02-14 10:02:59,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:02:59,098 INFO L93 Difference]: Finished difference Result 156 states and 176 transitions. [2023-02-14 10:02:59,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 10:02:59,099 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 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 81 [2023-02-14 10:02:59,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:02:59,100 INFO L225 Difference]: With dead ends: 156 [2023-02-14 10:02:59,100 INFO L226 Difference]: Without dead ends: 104 [2023-02-14 10:02:59,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 148 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2023-02-14 10:02:59,101 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 417 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 10:02:59,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 36 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 10:02:59,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-02-14 10:02:59,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2023-02-14 10:02:59,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0947368421052632) internal successors, (104), 95 states have internal predecessors, (104), 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) [2023-02-14 10:02:59,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2023-02-14 10:02:59,109 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 81 [2023-02-14 10:02:59,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:02:59,110 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2023-02-14 10:02:59,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 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) [2023-02-14 10:02:59,110 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2023-02-14 10:02:59,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-02-14 10:02:59,111 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:02:59,111 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1] [2023-02-14 10:02:59,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 10:02:59,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:02:59,318 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:02:59,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:02:59,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1202071596, now seen corresponding path program 8 times [2023-02-14 10:02:59,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:02:59,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696289708] [2023-02-14 10:02:59,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:02:59,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:02:59,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:03:07,493 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 2 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:03:07,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:03:07,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696289708] [2023-02-14 10:03:07,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696289708] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:03:07,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510526732] [2023-02-14 10:03:07,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 10:03:07,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:03:07,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:03:07,501 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) [2023-02-14 10:03:07,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 10:03:07,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 10:03:07,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:03:07,586 WARN L261 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 148 conjunts are in the unsatisfiable core [2023-02-14 10:03:07,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:03:07,628 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 10:03:09,698 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:03:09,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:03:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 10:03:11,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510526732] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:03:11,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:03:11,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 24, 19] total 96 [2023-02-14 10:03:11,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838753734] [2023-02-14 10:03:11,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:03:11,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-02-14 10:03:11,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:03:11,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-02-14 10:03:11,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=8635, Unknown=0, NotChecked=0, Total=9120 [2023-02-14 10:03:11,223 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand has 96 states, 96 states have (on average 2.5625) internal successors, (246), 96 states have internal predecessors, (246), 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) [2023-02-14 10:03:20,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:03:20,150 INFO L93 Difference]: Finished difference Result 276 states and 306 transitions. [2023-02-14 10:03:20,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-02-14 10:03:20,151 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.5625) internal successors, (246), 96 states have internal predecessors, (246), 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 95 [2023-02-14 10:03:20,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:03:20,152 INFO L225 Difference]: With dead ends: 276 [2023-02-14 10:03:20,152 INFO L226 Difference]: Without dead ends: 272 [2023-02-14 10:03:20,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 146 SyntacticMatches, 26 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7354 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=1502, Invalid=20550, Unknown=0, NotChecked=0, Total=22052 [2023-02-14 10:03:20,155 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 131 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 5539 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 6262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 5539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-02-14 10:03:20,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 216 Invalid, 6262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [723 Valid, 5539 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-02-14 10:03:20,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-02-14 10:03:20,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 173. [2023-02-14 10:03:20,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.1046511627906976) internal successors, (190), 172 states have internal predecessors, (190), 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) [2023-02-14 10:03:20,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 190 transitions. [2023-02-14 10:03:20,179 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 190 transitions. Word has length 95 [2023-02-14 10:03:20,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:03:20,180 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 190 transitions. [2023-02-14 10:03:20,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.5625) internal successors, (246), 96 states have internal predecessors, (246), 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) [2023-02-14 10:03:20,180 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 190 transitions. [2023-02-14 10:03:20,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-02-14 10:03:20,181 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:03:20,181 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 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, 1, 1, 1, 1] [2023-02-14 10:03:20,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 10:03:20,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-14 10:03:20,385 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:03:20,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:03:20,387 INFO L85 PathProgramCache]: Analyzing trace with hash 208634870, now seen corresponding path program 9 times [2023-02-14 10:03:20,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:03:20,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469544443] [2023-02-14 10:03:20,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:03:20,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:03:20,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:03:20,587 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-02-14 10:03:20,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:03:20,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469544443] [2023-02-14 10:03:20,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469544443] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:03:20,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677233870] [2023-02-14 10:03:20,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 10:03:20,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:03:20,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:03:20,590 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) [2023-02-14 10:03:20,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 10:03:20,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-14 10:03:20,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:03:20,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-14 10:03:20,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:03:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-02-14 10:03:20,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:03:20,989 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-02-14 10:03:20,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677233870] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:03:20,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:03:20,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2023-02-14 10:03:20,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266270293] [2023-02-14 10:03:20,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:03:20,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-14 10:03:20,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:03:20,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-14 10:03:20,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2023-02-14 10:03:20,991 INFO L87 Difference]: Start difference. First operand 173 states and 190 transitions. Second operand has 24 states, 24 states have (on average 4.25) internal successors, (102), 24 states have internal predecessors, (102), 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) [2023-02-14 10:03:21,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:03:21,605 INFO L93 Difference]: Finished difference Result 467 states and 513 transitions. [2023-02-14 10:03:21,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-14 10:03:21,605 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.25) internal successors, (102), 24 states have internal predecessors, (102), 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 97 [2023-02-14 10:03:21,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:03:21,606 INFO L225 Difference]: With dead ends: 467 [2023-02-14 10:03:21,606 INFO L226 Difference]: Without dead ends: 196 [2023-02-14 10:03:21,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 183 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=937, Unknown=0, NotChecked=0, Total=1190 [2023-02-14 10:03:21,607 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 535 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 10:03:21,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 70 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [489 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 10:03:21,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-02-14 10:03:21,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 172. [2023-02-14 10:03:21,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.087719298245614) internal successors, (186), 171 states have internal predecessors, (186), 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) [2023-02-14 10:03:21,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 186 transitions. [2023-02-14 10:03:21,626 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 186 transitions. Word has length 97 [2023-02-14 10:03:21,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:03:21,626 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 186 transitions. [2023-02-14 10:03:21,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.25) internal successors, (102), 24 states have internal predecessors, (102), 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) [2023-02-14 10:03:21,626 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 186 transitions. [2023-02-14 10:03:21,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-02-14 10:03:21,627 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:03:21,628 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 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, 1, 1, 1, 1] [2023-02-14 10:03:21,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 10:03:21,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:03:21,837 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:03:21,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:03:21,838 INFO L85 PathProgramCache]: Analyzing trace with hash 356238296, now seen corresponding path program 10 times [2023-02-14 10:03:21,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:03:21,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972304079] [2023-02-14 10:03:21,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:03:21,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:03:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:03:22,022 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-02-14 10:03:22,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:03:22,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972304079] [2023-02-14 10:03:22,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972304079] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:03:22,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009742217] [2023-02-14 10:03:22,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 10:03:22,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:03:22,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:03:22,024 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:03:22,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 10:03:22,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 10:03:22,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:03:22,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-14 10:03:22,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:03:22,255 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-02-14 10:03:22,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:03:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-02-14 10:03:22,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009742217] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:03:22,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:03:22,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2023-02-14 10:03:22,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279364048] [2023-02-14 10:03:22,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:03:22,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-14 10:03:22,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:03:22,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-14 10:03:22,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2023-02-14 10:03:22,373 INFO L87 Difference]: Start difference. First operand 172 states and 186 transitions. Second operand has 24 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 24 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) [2023-02-14 10:03:22,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:03:22,827 INFO L93 Difference]: Finished difference Result 186 states and 200 transitions. [2023-02-14 10:03:22,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-14 10:03:22,828 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 24 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) Word has length 99 [2023-02-14 10:03:22,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:03:22,828 INFO L225 Difference]: With dead ends: 186 [2023-02-14 10:03:22,828 INFO L226 Difference]: Without dead ends: 122 [2023-02-14 10:03:22,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 177 SyntacticMatches, 10 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=236, Invalid=756, Unknown=0, NotChecked=0, Total=992 [2023-02-14 10:03:22,829 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 531 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 10:03:22,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 41 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 10:03:22,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-02-14 10:03:22,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2023-02-14 10:03:22,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.079646017699115) internal successors, (122), 113 states have internal predecessors, (122), 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) [2023-02-14 10:03:22,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2023-02-14 10:03:22,843 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 99 [2023-02-14 10:03:22,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:03:22,843 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2023-02-14 10:03:22,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 24 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) [2023-02-14 10:03:22,844 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2023-02-14 10:03:22,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-02-14 10:03:22,844 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:03:22,845 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:03:22,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 10:03:23,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-14 10:03:23,051 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:03:23,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:03:23,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1362635270, now seen corresponding path program 11 times [2023-02-14 10:03:23,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:03:23,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099577459] [2023-02-14 10:03:23,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:03:23,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:03:23,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:03:34,544 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 12 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:03:34,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:03:34,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099577459] [2023-02-14 10:03:34,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099577459] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:03:34,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392134623] [2023-02-14 10:03:34,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 10:03:34,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:03:34,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:03:34,546 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:03:34,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 10:03:35,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-14 10:03:35,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:03:35,085 WARN L261 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 184 conjunts are in the unsatisfiable core [2023-02-14 10:03:35,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:03:35,130 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 10:03:35,202 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 10:03:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:03:38,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:03:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-14 10:03:41,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392134623] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:03:41,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:03:41,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 29, 23] total 110 [2023-02-14 10:03:41,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452910182] [2023-02-14 10:03:41,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:03:41,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2023-02-14 10:03:41,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:03:41,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2023-02-14 10:03:41,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=11498, Unknown=0, NotChecked=0, Total=11990 [2023-02-14 10:03:41,055 INFO L87 Difference]: Start difference. First operand 114 states and 122 transitions. Second operand has 110 states, 110 states have (on average 2.6818181818181817) internal successors, (295), 110 states have internal predecessors, (295), 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) [2023-02-14 10:03:52,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:03:52,667 INFO L93 Difference]: Finished difference Result 225 states and 247 transitions. [2023-02-14 10:03:52,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-02-14 10:03:52,668 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.6818181818181817) internal successors, (295), 110 states have internal predecessors, (295), 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 113 [2023-02-14 10:03:52,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:03:52,669 INFO L225 Difference]: With dead ends: 225 [2023-02-14 10:03:52,669 INFO L226 Difference]: Without dead ends: 221 [2023-02-14 10:03:52,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 177 SyntacticMatches, 35 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8027 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=1504, Invalid=23618, Unknown=0, NotChecked=0, Total=25122 [2023-02-14 10:03:52,671 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 250 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 7478 mSolverCounterSat, 1338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 8816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1338 IncrementalHoareTripleChecker+Valid, 7478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-02-14 10:03:52,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 255 Invalid, 8816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1338 Valid, 7478 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-02-14 10:03:52,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-02-14 10:03:52,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 116. [2023-02-14 10:03:52,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0782608695652174) internal successors, (124), 115 states have internal predecessors, (124), 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) [2023-02-14 10:03:52,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 124 transitions. [2023-02-14 10:03:52,693 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 124 transitions. Word has length 113 [2023-02-14 10:03:52,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:03:52,693 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 124 transitions. [2023-02-14 10:03:52,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.6818181818181817) internal successors, (295), 110 states have internal predecessors, (295), 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) [2023-02-14 10:03:52,693 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 124 transitions. [2023-02-14 10:03:52,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-02-14 10:03:52,694 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:03:52,694 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:03:52,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-14 10:03:52,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-14 10:03:52,895 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:03:52,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:03:52,895 INFO L85 PathProgramCache]: Analyzing trace with hash -419294808, now seen corresponding path program 12 times [2023-02-14 10:03:52,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:03:52,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610387836] [2023-02-14 10:03:52,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:03:52,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:03:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:03:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2023-02-14 10:03:53,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:03:53,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610387836] [2023-02-14 10:03:53,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610387836] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:03:53,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815286050] [2023-02-14 10:03:53,138 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 10:03:53,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:03:53,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:03:53,141 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:03:53,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 10:03:53,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-14 10:03:53,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:03:53,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 10:03:53,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:03:53,513 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2023-02-14 10:03:53,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:03:53,709 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2023-02-14 10:03:53,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815286050] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:03:53,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:03:53,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 28 [2023-02-14 10:03:53,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859100390] [2023-02-14 10:03:53,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:03:53,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-14 10:03:53,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:03:53,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-14 10:03:53,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2023-02-14 10:03:53,711 INFO L87 Difference]: Start difference. First operand 116 states and 124 transitions. Second operand has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 28 states have internal predecessors, (94), 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) [2023-02-14 10:03:54,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:03:54,444 INFO L93 Difference]: Finished difference Result 419 states and 455 transitions. [2023-02-14 10:03:54,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-14 10:03:54,444 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 28 states have internal predecessors, (94), 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 115 [2023-02-14 10:03:54,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:03:54,445 INFO L225 Difference]: With dead ends: 419 [2023-02-14 10:03:54,445 INFO L226 Difference]: Without dead ends: 141 [2023-02-14 10:03:54,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 212 SyntacticMatches, 12 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=1306, Unknown=0, NotChecked=0, Total=1640 [2023-02-14 10:03:54,446 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 539 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 481 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 10:03:54,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 100 Invalid, 1529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [481 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 10:03:54,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-02-14 10:03:54,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 132. [2023-02-14 10:03:54,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0687022900763359) internal successors, (140), 131 states have internal predecessors, (140), 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) [2023-02-14 10:03:54,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 140 transitions. [2023-02-14 10:03:54,469 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 140 transitions. Word has length 115 [2023-02-14 10:03:54,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:03:54,469 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 140 transitions. [2023-02-14 10:03:54,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 28 states have internal predecessors, (94), 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) [2023-02-14 10:03:54,469 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 140 transitions. [2023-02-14 10:03:54,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-02-14 10:03:54,470 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:03:54,470 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:03:54,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-14 10:03:54,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-14 10:03:54,673 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:03:54,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:03:54,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1520659528, now seen corresponding path program 13 times [2023-02-14 10:03:54,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:03:54,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315165735] [2023-02-14 10:03:54,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:03:54,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:03:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:04:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:04:10,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:04:10,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315165735] [2023-02-14 10:04:10,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315165735] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:04:10,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331772982] [2023-02-14 10:04:10,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 10:04:10,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:04:10,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:04:10,699 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:04:10,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 10:04:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:04:10,815 WARN L261 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 216 conjunts are in the unsatisfiable core [2023-02-14 10:04:10,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:04:10,989 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2023-02-14 10:04:15,316 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:04:15,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:04:18,970 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-14 10:04:18,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331772982] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:04:18,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:04:18,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 34, 27] total 132 [2023-02-14 10:04:18,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412583577] [2023-02-14 10:04:18,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:04:18,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2023-02-14 10:04:18,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:04:18,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2023-02-14 10:04:18,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=16666, Unknown=0, NotChecked=0, Total=17292 [2023-02-14 10:04:18,975 INFO L87 Difference]: Start difference. First operand 132 states and 140 transitions. Second operand has 132 states, 132 states have (on average 2.5681818181818183) internal successors, (339), 132 states have internal predecessors, (339), 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) [2023-02-14 10:04:39,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:04:39,168 INFO L93 Difference]: Finished difference Result 354 states and 384 transitions. [2023-02-14 10:04:39,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-02-14 10:04:39,168 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.5681818181818183) internal successors, (339), 132 states have internal predecessors, (339), 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 131 [2023-02-14 10:04:39,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:04:39,170 INFO L225 Difference]: With dead ends: 354 [2023-02-14 10:04:39,171 INFO L226 Difference]: Without dead ends: 350 [2023-02-14 10:04:39,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 206 SyntacticMatches, 38 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12639 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=2593, Invalid=40049, Unknown=0, NotChecked=0, Total=42642 [2023-02-14 10:04:39,173 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 318 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 11016 mSolverCounterSat, 1744 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 12760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1744 IncrementalHoareTripleChecker+Valid, 11016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:04:39,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 268 Invalid, 12760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1744 Valid, 11016 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2023-02-14 10:04:39,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2023-02-14 10:04:39,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 241. [2023-02-14 10:04:39,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.0833333333333333) internal successors, (260), 240 states have internal predecessors, (260), 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) [2023-02-14 10:04:39,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 260 transitions. [2023-02-14 10:04:39,233 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 260 transitions. Word has length 131 [2023-02-14 10:04:39,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:04:39,233 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 260 transitions. [2023-02-14 10:04:39,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.5681818181818183) internal successors, (339), 132 states have internal predecessors, (339), 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) [2023-02-14 10:04:39,234 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 260 transitions. [2023-02-14 10:04:39,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-02-14 10:04:39,234 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:04:39,234 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:04:39,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-14 10:04:39,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-14 10:04:39,435 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:04:39,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:04:39,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1011689766, now seen corresponding path program 14 times [2023-02-14 10:04:39,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:04:39,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57914011] [2023-02-14 10:04:39,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:04:39,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:04:39,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:04:39,698 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-02-14 10:04:39,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:04:39,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57914011] [2023-02-14 10:04:39,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57914011] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:04:39,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882633455] [2023-02-14 10:04:39,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 10:04:39,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:04:39,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:04:39,701 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:04:39,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-14 10:04:39,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 10:04:39,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:04:39,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-14 10:04:39,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:04:40,097 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-02-14 10:04:40,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:04:40,293 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-02-14 10:04:40,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882633455] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:04:40,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:04:40,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-02-14 10:04:40,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278960217] [2023-02-14 10:04:40,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:04:40,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-14 10:04:40,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:04:40,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-14 10:04:40,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2023-02-14 10:04:40,295 INFO L87 Difference]: Start difference. First operand 241 states and 260 transitions. Second operand has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 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) [2023-02-14 10:04:40,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:04:40,846 INFO L93 Difference]: Finished difference Result 569 states and 614 transitions. [2023-02-14 10:04:40,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-14 10:04:40,846 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 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 133 [2023-02-14 10:04:40,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:04:40,847 INFO L225 Difference]: With dead ends: 569 [2023-02-14 10:04:40,847 INFO L226 Difference]: Without dead ends: 244 [2023-02-14 10:04:40,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 243 SyntacticMatches, 14 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2023-02-14 10:04:40,848 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 138 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 10:04:40,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 100 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 10:04:40,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-02-14 10:04:40,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2023-02-14 10:04:40,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.0826446280991735) internal successors, (262), 242 states have internal predecessors, (262), 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) [2023-02-14 10:04:40,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 262 transitions. [2023-02-14 10:04:40,901 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 262 transitions. Word has length 133 [2023-02-14 10:04:40,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:04:40,901 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 262 transitions. [2023-02-14 10:04:40,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 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) [2023-02-14 10:04:40,902 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 262 transitions. [2023-02-14 10:04:40,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-02-14 10:04:40,903 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:04:40,903 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:04:40,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-14 10:04:41,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:04:41,109 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:04:41,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:04:41,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1838655620, now seen corresponding path program 15 times [2023-02-14 10:04:41,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:04:41,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463634397] [2023-02-14 10:04:41,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:04:41,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:04:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:04:41,369 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2023-02-14 10:04:41,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:04:41,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463634397] [2023-02-14 10:04:41,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463634397] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:04:41,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58513675] [2023-02-14 10:04:41,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 10:04:41,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:04:41,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:04:41,373 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:04:41,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-14 10:04:41,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-14 10:04:41,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:04:41,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-14 10:04:41,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:04:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2023-02-14 10:04:41,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:04:41,887 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2023-02-14 10:04:41,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58513675] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:04:41,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:04:41,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-02-14 10:04:41,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293254534] [2023-02-14 10:04:41,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:04:41,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-14 10:04:41,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:04:41,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-14 10:04:41,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2023-02-14 10:04:41,890 INFO L87 Difference]: Start difference. First operand 243 states and 262 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 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) [2023-02-14 10:04:42,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:04:42,267 INFO L93 Difference]: Finished difference Result 369 states and 402 transitions. [2023-02-14 10:04:42,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-14 10:04:42,267 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 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 135 [2023-02-14 10:04:42,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:04:42,268 INFO L225 Difference]: With dead ends: 369 [2023-02-14 10:04:42,268 INFO L226 Difference]: Without dead ends: 158 [2023-02-14 10:04:42,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 247 SyntacticMatches, 14 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=347, Invalid=843, Unknown=0, NotChecked=0, Total=1190 [2023-02-14 10:04:42,269 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 516 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 10:04:42,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 36 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 10:04:42,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-02-14 10:04:42,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2023-02-14 10:04:42,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0604026845637584) internal successors, (158), 149 states have internal predecessors, (158), 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) [2023-02-14 10:04:42,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 158 transitions. [2023-02-14 10:04:42,314 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 158 transitions. Word has length 135 [2023-02-14 10:04:42,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:04:42,314 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 158 transitions. [2023-02-14 10:04:42,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 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) [2023-02-14 10:04:42,315 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 158 transitions. [2023-02-14 10:04:42,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-02-14 10:04:42,315 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:04:42,316 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:04:42,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-14 10:04:42,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-14 10:04:42,522 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:04:42,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:04:42,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1596967702, now seen corresponding path program 16 times [2023-02-14 10:04:42,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:04:42,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454823435] [2023-02-14 10:04:42,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:04:42,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:04:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:05:02,690 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 42 proven. 399 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:05:02,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:05:02,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454823435] [2023-02-14 10:05:02,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454823435] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:05:02,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044038895] [2023-02-14 10:05:02,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 10:05:02,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:05:02,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:05:02,693 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:05:02,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-14 10:05:02,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 10:05:02,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:05:02,796 WARN L261 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 234 conjunts are in the unsatisfiable core [2023-02-14 10:05:02,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:05:07,404 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-14 10:05:07,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:05:11,402 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:05:11,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 120 treesize of output 551 [2023-02-14 10:05:16,365 INFO L321 Elim1Store]: treesize reduction 504, result has 5.4 percent of original size [2023-02-14 10:05:16,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 121 treesize of output 48 [2023-02-14 10:05:16,492 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-14 10:05:16,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044038895] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:05:16,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:05:16,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 32, 32] total 134 [2023-02-14 10:05:16,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654680177] [2023-02-14 10:05:16,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:05:16,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2023-02-14 10:05:16,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:05:16,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2023-02-14 10:05:16,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=16876, Unknown=0, NotChecked=0, Total=17822 [2023-02-14 10:05:16,495 INFO L87 Difference]: Start difference. First operand 150 states and 158 transitions. Second operand has 134 states, 134 states have (on average 2.6641791044776117) internal successors, (357), 134 states have internal predecessors, (357), 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)