./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_const4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum_const4.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 e61c61c9ffe0a2031cf5a0964b1882adcc5bdae1b7345aeaf1c374f155ad9e78 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 19:55:53,069 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 19:55:53,071 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 19:55:53,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 19:55:53,110 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 19:55:53,113 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 19:55:53,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 19:55:53,116 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 19:55:53,118 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 19:55:53,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 19:55:53,123 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 19:55:53,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 19:55:53,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 19:55:53,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 19:55:53,129 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 19:55:53,130 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 19:55:53,130 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 19:55:53,132 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 19:55:53,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 19:55:53,141 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 19:55:53,143 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 19:55:53,145 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 19:55:53,146 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 19:55:53,146 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 19:55:53,153 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 19:55:53,154 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 19:55:53,154 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 19:55:53,155 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 19:55:53,156 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 19:55:53,156 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 19:55:53,157 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 19:55:53,157 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 19:55:53,158 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 19:55:53,159 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 19:55:53,160 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 19:55:53,160 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 19:55:53,161 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 19:55:53,161 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 19:55:53,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 19:55:53,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 19:55:53,163 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 19:55:53,164 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 19:55:53,193 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 19:55:53,193 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 19:55:53,194 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 19:55:53,194 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 19:55:53,195 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 19:55:53,195 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 19:55:53,195 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 19:55:53,196 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 19:55:53,196 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 19:55:53,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 19:55:53,197 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 19:55:53,197 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 19:55:53,197 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 19:55:53,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 19:55:53,197 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 19:55:53,198 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 19:55:53,198 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 19:55:53,198 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 19:55:53,198 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 19:55:53,198 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 19:55:53,199 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 19:55:53,199 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 19:55:53,199 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 19:55:53,199 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 19:55:53,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 19:55:53,199 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 19:55:53,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 19:55:53,200 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 19:55:53,201 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 19:55:53,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 19:55:53,201 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 19:55:53,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 19:55:53,202 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 19:55:53,202 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 19:55:53,202 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 19:55:53,202 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e61c61c9ffe0a2031cf5a0964b1882adcc5bdae1b7345aeaf1c374f155ad9e78 [2023-02-17 19:55:53,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 19:55:53,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 19:55:53,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 19:55:53,439 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 19:55:53,439 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 19:55:53,440 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const4.c [2023-02-17 19:55:54,464 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 19:55:54,666 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 19:55:54,666 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const4.c [2023-02-17 19:55:54,670 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84751bafc/05601fa56a844bb8893718080b076997/FLAGc4e75a28d [2023-02-17 19:55:54,681 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84751bafc/05601fa56a844bb8893718080b076997 [2023-02-17 19:55:54,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 19:55:54,683 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 19:55:54,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 19:55:54,684 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 19:55:54,687 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 19:55:54,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 07:55:54" (1/1) ... [2023-02-17 19:55:54,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@125cc76a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:55:54, skipping insertion in model container [2023-02-17 19:55:54,689 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 07:55:54" (1/1) ... [2023-02-17 19:55:54,695 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 19:55:54,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 19:55:54,841 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_sum_const4.c[406,419] [2023-02-17 19:55:54,877 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 19:55:54,889 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 19:55:54,902 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_sum_const4.c[406,419] [2023-02-17 19:55:54,923 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 19:55:54,938 INFO L208 MainTranslator]: Completed translation [2023-02-17 19:55:54,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:55:54 WrapperNode [2023-02-17 19:55:54,938 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 19:55:54,939 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 19:55:54,939 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 19:55:54,940 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 19:55:54,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:55:54" (1/1) ... [2023-02-17 19:55:54,959 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:55:54" (1/1) ... [2023-02-17 19:55:54,982 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 126 [2023-02-17 19:55:54,983 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 19:55:54,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 19:55:54,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 19:55:54,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 19:55:54,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:55:54" (1/1) ... [2023-02-17 19:55:54,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:55:54" (1/1) ... [2023-02-17 19:55:54,996 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:55:54" (1/1) ... [2023-02-17 19:55:54,996 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:55:54" (1/1) ... [2023-02-17 19:55:55,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:55:54" (1/1) ... [2023-02-17 19:55:55,017 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:55:54" (1/1) ... [2023-02-17 19:55:55,022 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:55:54" (1/1) ... [2023-02-17 19:55:55,023 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:55:54" (1/1) ... [2023-02-17 19:55:55,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 19:55:55,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 19:55:55,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 19:55:55,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 19:55:55,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:55:54" (1/1) ... [2023-02-17 19:55:55,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 19:55:55,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 19:55:55,054 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) [2023-02-17 19:55:55,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 19:55:55,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 19:55:55,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 19:55:55,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 19:55:55,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 19:55:55,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 19:55:55,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 19:55:55,085 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 [2023-02-17 19:55:55,172 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 19:55:55,173 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 19:55:55,327 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 19:55:55,332 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 19:55:55,332 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2023-02-17 19:55:55,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 07:55:55 BoogieIcfgContainer [2023-02-17 19:55:55,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 19:55:55,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 19:55:55,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 19:55:55,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 19:55:55,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 07:55:54" (1/3) ... [2023-02-17 19:55:55,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2662e3fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 07:55:55, skipping insertion in model container [2023-02-17 19:55:55,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:55:54" (2/3) ... [2023-02-17 19:55:55,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2662e3fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 07:55:55, skipping insertion in model container [2023-02-17 19:55:55,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 07:55:55" (3/3) ... [2023-02-17 19:55:55,340 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_const4.c [2023-02-17 19:55:55,364 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 19:55:55,364 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 19:55:55,422 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 19:55:55,429 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;@29468de3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 19:55:55,429 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 19:55:55,433 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) [2023-02-17 19:55:55,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-17 19:55:55,440 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:55:55,440 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] [2023-02-17 19:55:55,441 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:55:55,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:55:55,445 INFO L85 PathProgramCache]: Analyzing trace with hash -2094998668, now seen corresponding path program 1 times [2023-02-17 19:55:55,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:55:55,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975486553] [2023-02-17 19:55:55,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:55:55,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:55:55,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:55:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 19:55:55,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:55:55,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975486553] [2023-02-17 19:55:55,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975486553] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 19:55:55,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 19:55:55,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 19:55:55,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043717687] [2023-02-17 19:55:55,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 19:55:55,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 19:55:55,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:55:55,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 19:55:55,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 19:55:55,605 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) [2023-02-17 19:55:55,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:55:55,621 INFO L93 Difference]: Finished difference Result 71 states and 106 transitions. [2023-02-17 19:55:55,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 19:55:55,624 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 [2023-02-17 19:55:55,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:55:55,629 INFO L225 Difference]: With dead ends: 71 [2023-02-17 19:55:55,630 INFO L226 Difference]: Without dead ends: 33 [2023-02-17 19:55:55,632 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 [2023-02-17 19:55:55,635 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 [2023-02-17 19:55:55,635 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] [2023-02-17 19:55:55,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-17 19:55:55,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-02-17 19:55:55,657 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) [2023-02-17 19:55:55,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2023-02-17 19:55:55,659 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 23 [2023-02-17 19:55:55,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:55:55,660 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2023-02-17 19:55:55,660 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) [2023-02-17 19:55:55,660 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2023-02-17 19:55:55,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-17 19:55:55,661 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:55:55,661 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] [2023-02-17 19:55:55,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 19:55:55,662 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:55:55,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:55:55,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1680934388, now seen corresponding path program 1 times [2023-02-17 19:55:55,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:55:55,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449749743] [2023-02-17 19:55:55,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:55:55,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:55:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:55:55,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 19:55:55,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:55:55,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449749743] [2023-02-17 19:55:55,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449749743] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 19:55:55,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 19:55:55,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 19:55:55,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283500796] [2023-02-17 19:55:55,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 19:55:55,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 19:55:55,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:55:55,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 19:55:55,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 19:55:55,791 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) [2023-02-17 19:55:55,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:55:55,853 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2023-02-17 19:55:55,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 19:55:55,854 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 [2023-02-17 19:55:55,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:55:55,855 INFO L225 Difference]: With dead ends: 63 [2023-02-17 19:55:55,855 INFO L226 Difference]: Without dead ends: 35 [2023-02-17 19:55:55,856 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 [2023-02-17 19:55:55,857 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 19:55:55,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 19:55:55,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-17 19:55:55,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2023-02-17 19:55:55,865 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) [2023-02-17 19:55:55,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-02-17 19:55:55,868 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 23 [2023-02-17 19:55:55,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:55:55,869 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-02-17 19:55:55,869 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) [2023-02-17 19:55:55,869 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-02-17 19:55:55,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-17 19:55:55,870 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:55:55,870 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] [2023-02-17 19:55:55,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 19:55:55,871 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:55:55,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:55:55,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1381660206, now seen corresponding path program 1 times [2023-02-17 19:55:55,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:55:55,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94138722] [2023-02-17 19:55:55,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:55:55,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:55:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:55:55,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 19:55:55,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:55:55,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94138722] [2023-02-17 19:55:55,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94138722] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 19:55:55,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 19:55:55,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 19:55:55,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129165857] [2023-02-17 19:55:55,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 19:55:55,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 19:55:55,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:55:55,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 19:55:55,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 19:55:55,992 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) [2023-02-17 19:55:56,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:55:56,072 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2023-02-17 19:55:56,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 19:55:56,073 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 [2023-02-17 19:55:56,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:55:56,074 INFO L225 Difference]: With dead ends: 76 [2023-02-17 19:55:56,074 INFO L226 Difference]: Without dead ends: 51 [2023-02-17 19:55:56,075 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 [2023-02-17 19:55:56,076 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 59 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 19:55:56,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 17 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 19:55:56,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-17 19:55:56,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2023-02-17 19:55:56,083 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) [2023-02-17 19:55:56,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2023-02-17 19:55:56,084 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 25 [2023-02-17 19:55:56,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:55:56,084 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2023-02-17 19:55:56,085 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) [2023-02-17 19:55:56,085 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2023-02-17 19:55:56,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-17 19:55:56,086 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:55:56,086 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] [2023-02-17 19:55:56,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 19:55:56,086 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:55:56,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:55:56,087 INFO L85 PathProgramCache]: Analyzing trace with hash -158323138, now seen corresponding path program 1 times [2023-02-17 19:55:56,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:55:56,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810021101] [2023-02-17 19:55:56,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:55:56,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:55:56,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:55:56,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 19:55:56,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:55:56,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810021101] [2023-02-17 19:55:56,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810021101] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 19:55:56,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413644658] [2023-02-17 19:55:56,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:55:56,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:55:56,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 19:55:56,224 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) [2023-02-17 19:55:56,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 19:55:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:55:56,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-17 19:55:56,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 19:55:56,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 19:55:56,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 19:55:56,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 19:55:56,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413644658] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 19:55:56,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 19:55:56,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-17 19:55:56,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513270555] [2023-02-17 19:55:56,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 19:55:56,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 19:55:56,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:55:56,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 19:55:56,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-02-17 19:55:56,363 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) [2023-02-17 19:55:56,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:55:56,480 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2023-02-17 19:55:56,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 19:55:56,482 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 [2023-02-17 19:55:56,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:55:56,482 INFO L225 Difference]: With dead ends: 81 [2023-02-17 19:55:56,484 INFO L226 Difference]: Without dead ends: 45 [2023-02-17 19:55:56,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-02-17 19:55:56,487 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 19:55:56,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 40 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 19:55:56,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-02-17 19:55:56,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2023-02-17 19:55:56,498 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) [2023-02-17 19:55:56,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2023-02-17 19:55:56,502 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 41 [2023-02-17 19:55:56,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:55:56,503 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2023-02-17 19:55:56,503 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) [2023-02-17 19:55:56,503 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2023-02-17 19:55:56,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-17 19:55:56,504 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:55:56,504 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] [2023-02-17 19:55:56,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 19:55:56,704 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 [2023-02-17 19:55:56,705 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:55:56,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:55:56,706 INFO L85 PathProgramCache]: Analyzing trace with hash 408266208, now seen corresponding path program 2 times [2023-02-17 19:55:56,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:55:56,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135675718] [2023-02-17 19:55:56,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:55:56,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:55:56,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:55:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-17 19:55:56,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:55:56,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135675718] [2023-02-17 19:55:56,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135675718] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 19:55:56,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044797376] [2023-02-17 19:55:56,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 19:55:56,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:55:56,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 19:55:56,843 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) [2023-02-17 19:55:56,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 19:55:56,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 19:55:56,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 19:55:56,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-17 19:55:56,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 19:55:56,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-17 19:55:56,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 19:55:56,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-17 19:55:56,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044797376] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 19:55:56,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 19:55:56,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-02-17 19:55:56,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177904341] [2023-02-17 19:55:56,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 19:55:56,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 19:55:56,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:55:56,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 19:55:57,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-02-17 19:55:57,001 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) [2023-02-17 19:55:57,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:55:57,117 INFO L93 Difference]: Finished difference Result 101 states and 123 transitions. [2023-02-17 19:55:57,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 19:55:57,118 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 [2023-02-17 19:55:57,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:55:57,118 INFO L225 Difference]: With dead ends: 101 [2023-02-17 19:55:57,119 INFO L226 Difference]: Without dead ends: 69 [2023-02-17 19:55:57,119 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 [2023-02-17 19:55:57,120 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 19:55:57,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 20 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 19:55:57,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-17 19:55:57,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2023-02-17 19:55:57,136 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) [2023-02-17 19:55:57,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2023-02-17 19:55:57,137 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 43 [2023-02-17 19:55:57,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:55:57,138 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2023-02-17 19:55:57,139 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) [2023-02-17 19:55:57,139 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2023-02-17 19:55:57,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-17 19:55:57,142 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:55:57,142 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] [2023-02-17 19:55:57,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 19:55:57,342 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 [2023-02-17 19:55:57,343 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:55:57,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:55:57,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1004340752, now seen corresponding path program 3 times [2023-02-17 19:55:57,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:55:57,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704870710] [2023-02-17 19:55:57,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:55:57,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:55:57,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:56:01,089 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 19:56:01,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:56:01,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704870710] [2023-02-17 19:56:01,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704870710] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 19:56:01,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943519202] [2023-02-17 19:56:01,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 19:56:01,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:56:01,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 19:56:01,095 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) [2023-02-17 19:56:01,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 19:56:01,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-17 19:56:01,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 19:56:01,195 WARN L261 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 89 conjunts are in the unsatisfiable core [2023-02-17 19:56:01,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 19:56:01,258 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 [2023-02-17 19:56:02,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 19:56:02,407 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 19:56:02,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 45 [2023-02-17 19:56:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 19:56:02,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 19:56:06,382 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 224 treesize of output 200 [2023-02-17 19:56:06,407 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 19:56:06,408 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 1178 treesize of output 938 [2023-02-17 19:58:19,171 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 73 treesize of output 65 [2023-02-17 19:58:19,187 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 19:58:19,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 19:58:19,200 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 19:58:19,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 130 [2023-02-17 20:02:20,888 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 20:02:20,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943519202] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 20:02:20,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 20:02:20,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 23] total 55 [2023-02-17 20:02:20,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769928416] [2023-02-17 20:02:20,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 20:02:20,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-02-17 20:02:20,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 20:02:20,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-02-17 20:02:20,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=2663, Unknown=0, NotChecked=0, Total=2970 [2023-02-17 20:02:20,899 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 55 states, 55 states have (on average 3.0727272727272728) internal successors, (169), 55 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) [2023-02-17 20:02:31,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-17 20:03:28,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-17 20:03:29,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-17 20:04:30,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-17 20:04:35,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-17 20:04:37,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-17 20:04:45,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-17 20:04:51,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-17 20:04:53,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-17 20:04:56,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-17 20:04:58,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-17 20:05:00,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-17 20:05:03,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-17 20:05:05,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-17 20:05:06,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-17 20:05:09,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-17 20:05:11,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-17 20:05:13,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-17 20:05:14,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 20:05:14,580 INFO L93 Difference]: Finished difference Result 174 states and 200 transitions. [2023-02-17 20:05:14,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-17 20:05:14,580 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.0727272727272728) internal successors, (169), 55 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 [2023-02-17 20:05:14,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 20:05:14,581 INFO L225 Difference]: With dead ends: 174 [2023-02-17 20:05:14,581 INFO L226 Difference]: Without dead ends: 168 [2023-02-17 20:05:14,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 54 SyntacticMatches, 54 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2845 ImplicationChecksByTransitivity, 244.0s TimeCoverageRelationStatistics Valid=886, Invalid=7304, Unknown=0, NotChecked=0, Total=8190 [2023-02-17 20:05:14,585 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 64 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 1876 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.7s IncrementalHoareTripleChecker+Time [2023-02-17 20:05:14,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 134 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1876 Invalid, 0 Unknown, 0 Unchecked, 37.7s Time] [2023-02-17 20:05:14,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-17 20:05:15,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 101. [2023-02-17 20:05:15,003 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) [2023-02-17 20:05:15,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2023-02-17 20:05:15,004 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 59 [2023-02-17 20:05:15,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 20:05:15,005 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2023-02-17 20:05:15,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.0727272727272728) internal successors, (169), 55 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) [2023-02-17 20:05:15,005 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2023-02-17 20:05:15,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-02-17 20:05:15,006 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 20:05:15,006 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] [2023-02-17 20:05:15,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 20:05:15,207 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 [2023-02-17 20:05:15,207 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 20:05:15,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 20:05:15,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1580077422, now seen corresponding path program 4 times [2023-02-17 20:05:15,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 20:05:15,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506564979] [2023-02-17 20:05:15,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:05:15,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 20:05:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 20:05:15,326 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-17 20:05:15,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 20:05:15,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506564979] [2023-02-17 20:05:15,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506564979] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 20:05:15,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758512888] [2023-02-17 20:05:15,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 20:05:15,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 20:05:15,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 20:05:15,328 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) [2023-02-17 20:05:15,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 20:05:15,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 20:05:15,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 20:05:15,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 20:05:15,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 20:05:15,437 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-17 20:05:15,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 20:05:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-17 20:05:15,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758512888] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 20:05:15,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 20:05:15,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-17 20:05:15,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203870344] [2023-02-17 20:05:15,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 20:05:15,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 20:05:15,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 20:05:15,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 20:05:15,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-17 20:05:15,484 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 20:05:16,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 20:05:16,599 INFO L93 Difference]: Finished difference Result 233 states and 268 transitions. [2023-02-17 20:05:16,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 20:05:16,599 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-02-17 20:05:16,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 20:05:16,600 INFO L225 Difference]: With dead ends: 233 [2023-02-17 20:05:16,600 INFO L226 Difference]: Without dead ends: 136 [2023-02-17 20:05:16,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 110 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-02-17 20:05:16,602 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 169 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 20:05:16,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 45 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 20:05:16,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-17 20:05:17,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 112. [2023-02-17 20:05:17,389 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) [2023-02-17 20:05:17,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2023-02-17 20:05:17,389 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 61 [2023-02-17 20:05:17,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 20:05:17,390 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2023-02-17 20:05:17,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 20:05:17,390 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2023-02-17 20:05:17,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-17 20:05:17,391 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 20:05:17,391 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] [2023-02-17 20:05:17,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 20:05:17,596 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 [2023-02-17 20:05:17,597 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 20:05:17,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 20:05:17,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1506179060, now seen corresponding path program 5 times [2023-02-17 20:05:17,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 20:05:17,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5477056] [2023-02-17 20:05:17,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:05:17,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 20:05:17,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 20:05:17,686 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-17 20:05:17,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 20:05:17,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5477056] [2023-02-17 20:05:17,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5477056] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 20:05:17,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183123594] [2023-02-17 20:05:17,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 20:05:17,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 20:05:17,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 20:05:17,689 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) [2023-02-17 20:05:17,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 20:05:17,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-17 20:05:17,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 20:05:17,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 20:05:17,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 20:05:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-17 20:05:17,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 20:05:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-17 20:05:17,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183123594] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 20:05:17,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 20:05:17,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-17 20:05:17,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983508741] [2023-02-17 20:05:17,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 20:05:17,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 20:05:17,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 20:05:17,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 20:05:17,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-17 20:05:17,878 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) [2023-02-17 20:05:19,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 20:05:19,041 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2023-02-17 20:05:19,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 20:05:19,041 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 [2023-02-17 20:05:19,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 20:05:19,042 INFO L225 Difference]: With dead ends: 126 [2023-02-17 20:05:19,042 INFO L226 Difference]: Without dead ends: 86 [2023-02-17 20:05:19,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 113 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-02-17 20:05:19,043 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 120 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 20:05:19,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 35 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 20:05:19,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-17 20:05:19,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2023-02-17 20:05:19,815 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) [2023-02-17 20:05:19,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2023-02-17 20:05:19,816 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 63 [2023-02-17 20:05:19,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 20:05:19,816 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2023-02-17 20:05:19,816 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) [2023-02-17 20:05:19,816 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2023-02-17 20:05:19,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-02-17 20:05:19,817 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 20:05:19,817 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] [2023-02-17 20:05:19,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 20:05:20,023 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 [2023-02-17 20:05:20,023 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 20:05:20,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 20:05:20,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1152417058, now seen corresponding path program 6 times [2023-02-17 20:05:20,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 20:05:20,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649017106] [2023-02-17 20:05:20,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:05:20,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 20:05:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 20:05:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 20:05:26,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 20:05:26,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649017106] [2023-02-17 20:05:26,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649017106] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 20:05:26,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549087044] [2023-02-17 20:05:26,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 20:05:26,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 20:05:26,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 20:05:26,166 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) [2023-02-17 20:05:26,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 20:05:26,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-17 20:05:26,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 20:05:26,246 WARN L261 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 118 conjunts are in the unsatisfiable core [2023-02-17 20:05:26,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 20:05:26,304 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 [2023-02-17 20:05:31,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 20:05:31,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 20:05:31,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 20:05:31,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 20:05:31,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 20:05:31,070 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 20:05:31,071 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 20:05:31,072 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 20:05:31,073 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 20:05:31,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 139 treesize of output 55 [2023-02-17 20:05:31,199 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 20:05:31,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 20:06:44,613 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 975 treesize of output 879 [2023-02-17 20:06:44,654 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 20:06:44,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 27037 treesize of output 16334