./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_const5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 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_const5.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 e6c0909fc593366247feb227b85c6733aa1dfc9c572e69f3a5aa951fa82d0326 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 09:37:42,644 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 09:37:42,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 09:37:42,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 09:37:42,680 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 09:37:42,684 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 09:37:42,686 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 09:37:42,688 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 09:37:42,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 09:37:42,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 09:37:42,696 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 09:37:42,698 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 09:37:42,698 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 09:37:42,700 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 09:37:42,701 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 09:37:42,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 09:37:42,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 09:37:42,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 09:37:42,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 09:37:42,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 09:37:42,711 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 09:37:42,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 09:37:42,712 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 09:37:42,713 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 09:37:42,716 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 09:37:42,716 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 09:37:42,716 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 09:37:42,717 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 09:37:42,717 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 09:37:42,718 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 09:37:42,718 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 09:37:42,719 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 09:37:42,720 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 09:37:42,720 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 09:37:42,721 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 09:37:42,721 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 09:37:42,721 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 09:37:42,722 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 09:37:42,722 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 09:37:42,722 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 09:37:42,723 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 09:37:42,724 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 09:37:42,748 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 09:37:42,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 09:37:42,749 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 09:37:42,749 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 09:37:42,750 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 09:37:42,750 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 09:37:42,750 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 09:37:42,750 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 09:37:42,751 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 09:37:42,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 09:37:42,751 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 09:37:42,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 09:37:42,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 09:37:42,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 09:37:42,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 09:37:42,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 09:37:42,752 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 09:37:42,752 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 09:37:42,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 09:37:42,753 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 09:37:42,753 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 09:37:42,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 09:37:42,753 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 09:37:42,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 09:37:42,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 09:37:42,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 09:37:42,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 09:37:42,754 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 09:37:42,754 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 09:37:42,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 09:37:42,754 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 09:37:42,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 09:37:42,755 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 09:37:42,755 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 09:37:42,755 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 09:37:42,755 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6c0909fc593366247feb227b85c6733aa1dfc9c572e69f3a5aa951fa82d0326 [2023-02-15 09:37:42,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 09:37:42,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 09:37:42,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 09:37:42,967 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 09:37:42,968 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 09:37:42,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const5.c [2023-02-15 09:37:43,855 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 09:37:44,004 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 09:37:44,004 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const5.c [2023-02-15 09:37:44,008 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43c004416/814134182ff9484baebe163e2296eea6/FLAG1821c807b [2023-02-15 09:37:44,016 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43c004416/814134182ff9484baebe163e2296eea6 [2023-02-15 09:37:44,017 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 09:37:44,018 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 09:37:44,019 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 09:37:44,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 09:37:44,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 09:37:44,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:37:44" (1/1) ... [2023-02-15 09:37:44,022 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6da1938e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:37:44, skipping insertion in model container [2023-02-15 09:37:44,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:37:44" (1/1) ... [2023-02-15 09:37:44,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 09:37:44,038 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 09:37:44,116 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_const5.c[406,419] [2023-02-15 09:37:44,131 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 09:37:44,136 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 09:37:44,147 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_const5.c[406,419] [2023-02-15 09:37:44,159 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 09:37:44,167 INFO L208 MainTranslator]: Completed translation [2023-02-15 09:37:44,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:37:44 WrapperNode [2023-02-15 09:37:44,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 09:37:44,169 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 09:37:44,169 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 09:37:44,169 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 09:37:44,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:37:44" (1/1) ... [2023-02-15 09:37:44,178 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:37:44" (1/1) ... [2023-02-15 09:37:44,190 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 148 [2023-02-15 09:37:44,190 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 09:37:44,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 09:37:44,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 09:37:44,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 09:37:44,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:37:44" (1/1) ... [2023-02-15 09:37:44,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:37:44" (1/1) ... [2023-02-15 09:37:44,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:37:44" (1/1) ... [2023-02-15 09:37:44,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:37:44" (1/1) ... [2023-02-15 09:37:44,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:37:44" (1/1) ... [2023-02-15 09:37:44,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:37:44" (1/1) ... [2023-02-15 09:37:44,205 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:37:44" (1/1) ... [2023-02-15 09:37:44,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:37:44" (1/1) ... [2023-02-15 09:37:44,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 09:37:44,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 09:37:44,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 09:37:44,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 09:37:44,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:37:44" (1/1) ... [2023-02-15 09:37:44,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 09:37:44,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:37:44,233 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) [2023-02-15 09:37:44,235 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 [2023-02-15 09:37:44,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 09:37:44,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 09:37:44,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 09:37:44,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 09:37:44,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 09:37:44,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 09:37:44,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 09:37:44,306 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 09:37:44,309 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 09:37:44,478 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 09:37:44,483 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 09:37:44,483 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2023-02-15 09:37:44,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:37:44 BoogieIcfgContainer [2023-02-15 09:37:44,484 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 09:37:44,486 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 09:37:44,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 09:37:44,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 09:37:44,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 09:37:44" (1/3) ... [2023-02-15 09:37:44,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bbeda10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:37:44, skipping insertion in model container [2023-02-15 09:37:44,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:37:44" (2/3) ... [2023-02-15 09:37:44,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bbeda10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:37:44, skipping insertion in model container [2023-02-15 09:37:44,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:37:44" (3/3) ... [2023-02-15 09:37:44,497 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_const5.c [2023-02-15 09:37:44,508 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 09:37:44,508 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 09:37:44,537 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 09:37:44,542 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;@9ba2f43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 09:37:44,542 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 09:37:44,545 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 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) [2023-02-15 09:37:44,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 09:37:44,549 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:37:44,549 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] [2023-02-15 09:37:44,550 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:37:44,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:37:44,554 INFO L85 PathProgramCache]: Analyzing trace with hash 226651140, now seen corresponding path program 1 times [2023-02-15 09:37:44,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:37:44,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899936076] [2023-02-15 09:37:44,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:37:44,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:37:44,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:37:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:37:44,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:37:44,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899936076] [2023-02-15 09:37:44,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899936076] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:37:44,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 09:37:44,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 09:37:44,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431137720] [2023-02-15 09:37:44,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:37:44,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 09:37:44,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:37:44,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 09:37:44,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 09:37:44,784 INFO L87 Difference]: Start difference. First operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 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 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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) [2023-02-15 09:37:44,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:37:44,812 INFO L93 Difference]: Finished difference Result 83 states and 126 transitions. [2023-02-15 09:37:44,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 09:37:44,814 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-15 09:37:44,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:37:44,819 INFO L225 Difference]: With dead ends: 83 [2023-02-15 09:37:44,820 INFO L226 Difference]: Without dead ends: 39 [2023-02-15 09:37:44,822 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 [2023-02-15 09:37:44,825 INFO L413 NwaCegarLoop]: 55 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, 55 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 [2023-02-15 09:37:44,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:37:44,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-02-15 09:37:44,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-02-15 09:37:44,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:37:44,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2023-02-15 09:37:44,852 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27 [2023-02-15 09:37:44,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:37:44,853 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2023-02-15 09:37:44,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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) [2023-02-15 09:37:44,854 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2023-02-15 09:37:44,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 09:37:44,855 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:37:44,855 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] [2023-02-15 09:37:44,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 09:37:44,856 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:37:44,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:37:44,857 INFO L85 PathProgramCache]: Analyzing trace with hash -833651044, now seen corresponding path program 1 times [2023-02-15 09:37:44,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:37:44,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876333368] [2023-02-15 09:37:44,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:37:44,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:37:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:37:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:37:44,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:37:44,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876333368] [2023-02-15 09:37:44,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876333368] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:37:44,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 09:37:44,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 09:37:44,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390369540] [2023-02-15 09:37:44,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:37:44,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 09:37:44,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:37:44,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 09:37:44,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 09:37:44,972 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2023-02-15 09:37:45,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:37:45,030 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2023-02-15 09:37:45,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 09:37:45,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-15 09:37:45,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:37:45,032 INFO L225 Difference]: With dead ends: 75 [2023-02-15 09:37:45,032 INFO L226 Difference]: Without dead ends: 41 [2023-02-15 09:37:45,032 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 [2023-02-15 09:37:45,033 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:37:45,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 50 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:37:45,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-15 09:37:45,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2023-02-15 09:37:45,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 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) [2023-02-15 09:37:45,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2023-02-15 09:37:45,038 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 27 [2023-02-15 09:37:45,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:37:45,038 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2023-02-15 09:37:45,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2023-02-15 09:37:45,039 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2023-02-15 09:37:45,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 09:37:45,039 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:37:45,040 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] [2023-02-15 09:37:45,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 09:37:45,040 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:37:45,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:37:45,041 INFO L85 PathProgramCache]: Analyzing trace with hash 479992254, now seen corresponding path program 1 times [2023-02-15 09:37:45,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:37:45,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519735933] [2023-02-15 09:37:45,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:37:45,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:37:45,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:37:45,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 09:37:45,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:37:45,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519735933] [2023-02-15 09:37:45,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519735933] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:37:45,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 09:37:45,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 09:37:45,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245149162] [2023-02-15 09:37:45,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:37:45,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 09:37:45,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:37:45,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 09:37:45,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 09:37:45,116 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2023-02-15 09:37:45,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:37:45,215 INFO L93 Difference]: Finished difference Result 92 states and 120 transitions. [2023-02-15 09:37:45,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 09:37:45,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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 29 [2023-02-15 09:37:45,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:37:45,217 INFO L225 Difference]: With dead ends: 92 [2023-02-15 09:37:45,218 INFO L226 Difference]: Without dead ends: 61 [2023-02-15 09:37:45,220 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 [2023-02-15 09:37:45,222 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 73 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:37:45,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 19 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:37:45,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-02-15 09:37:45,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2023-02-15 09:37:45,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:37:45,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2023-02-15 09:37:45,239 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 29 [2023-02-15 09:37:45,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:37:45,239 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2023-02-15 09:37:45,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2023-02-15 09:37:45,239 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2023-02-15 09:37:45,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 09:37:45,241 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:37:45,241 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:37:45,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 09:37:45,242 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:37:45,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:37:45,243 INFO L85 PathProgramCache]: Analyzing trace with hash -509099182, now seen corresponding path program 1 times [2023-02-15 09:37:45,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:37:45,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915085172] [2023-02-15 09:37:45,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:37:45,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:37:45,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:37:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 09:37:45,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:37:45,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915085172] [2023-02-15 09:37:45,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915085172] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:37:45,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893288144] [2023-02-15 09:37:45,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:37:45,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:37:45,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:37:45,393 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) [2023-02-15 09:37:45,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 09:37:45,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:37:45,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 09:37:45,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:37:45,529 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 09:37:45,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:37:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 09:37:45,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893288144] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:37:45,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:37:45,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-15 09:37:45,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108612617] [2023-02-15 09:37:45,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:37:45,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 09:37:45,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:37:45,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 09:37:45,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-02-15 09:37:45,563 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2023-02-15 09:37:45,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:37:45,668 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2023-02-15 09:37:45,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 09:37:45,668 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-02-15 09:37:45,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:37:45,668 INFO L225 Difference]: With dead ends: 97 [2023-02-15 09:37:45,669 INFO L226 Difference]: Without dead ends: 53 [2023-02-15 09:37:45,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-02-15 09:37:45,675 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:37:45,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:37:45,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-15 09:37:45,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2023-02-15 09:37:45,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 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) [2023-02-15 09:37:45,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2023-02-15 09:37:45,683 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49 [2023-02-15 09:37:45,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:37:45,683 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2023-02-15 09:37:45,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2023-02-15 09:37:45,683 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2023-02-15 09:37:45,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 09:37:45,685 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:37:45,685 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:37:45,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 09:37:45,891 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 [2023-02-15 09:37:45,891 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:37:45,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:37:45,891 INFO L85 PathProgramCache]: Analyzing trace with hash 290748660, now seen corresponding path program 2 times [2023-02-15 09:37:45,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:37:45,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626190041] [2023-02-15 09:37:45,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:37:45,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:37:45,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:37:45,964 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 09:37:45,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:37:45,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626190041] [2023-02-15 09:37:45,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626190041] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:37:45,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475573050] [2023-02-15 09:37:45,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:37:45,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:37:45,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:37:45,982 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) [2023-02-15 09:37:45,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 09:37:46,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:37:46,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:37:46,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 09:37:46,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:37:46,086 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 09:37:46,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:37:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 09:37:46,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475573050] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:37:46,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:37:46,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-02-15 09:37:46,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113591219] [2023-02-15 09:37:46,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:37:46,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 09:37:46,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:37:46,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 09:37:46,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-02-15 09:37:46,147 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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) [2023-02-15 09:37:46,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:37:46,253 INFO L93 Difference]: Finished difference Result 123 states and 151 transitions. [2023-02-15 09:37:46,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 09:37:46,254 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-15 09:37:46,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:37:46,257 INFO L225 Difference]: With dead ends: 123 [2023-02-15 09:37:46,257 INFO L226 Difference]: Without dead ends: 83 [2023-02-15 09:37:46,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2023-02-15 09:37:46,257 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 58 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:37:46,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 22 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:37:46,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-02-15 09:37:46,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2023-02-15 09:37:46,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:37:46,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2023-02-15 09:37:46,270 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 51 [2023-02-15 09:37:46,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:37:46,270 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2023-02-15 09:37:46,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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) [2023-02-15 09:37:46,271 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2023-02-15 09:37:46,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-15 09:37:46,275 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:37:46,275 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1] [2023-02-15 09:37:46,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 09:37:46,480 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 [2023-02-15 09:37:46,480 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:37:46,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:37:46,481 INFO L85 PathProgramCache]: Analyzing trace with hash -813057144, now seen corresponding path program 3 times [2023-02-15 09:37:46,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:37:46,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417845532] [2023-02-15 09:37:46,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:37:46,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:37:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:37:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:37:50,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:37:50,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417845532] [2023-02-15 09:37:50,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417845532] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:37:50,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590005067] [2023-02-15 09:37:50,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:37:50,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:37:50,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:37:50,197 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) [2023-02-15 09:37:50,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 09:37:50,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 09:37:50,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:37:50,256 WARN L261 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 104 conjunts are in the unsatisfiable core [2023-02-15 09:37:50,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:37:51,581 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 09:37:51,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2023-02-15 09:37:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:37:51,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:37:56,189 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 09:37:56,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 75 [2023-02-15 09:37:56,478 INFO L321 Elim1Store]: treesize reduction 58, result has 13.4 percent of original size [2023-02-15 09:37:56,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 19 [2023-02-15 09:37:57,127 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:37:57,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590005067] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:37:57,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:37:57,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 29] total 62 [2023-02-15 09:37:57,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235329903] [2023-02-15 09:37:57,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:37:57,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-15 09:37:57,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:37:57,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-15 09:37:57,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=3407, Unknown=0, NotChecked=0, Total=3782 [2023-02-15 09:37:57,131 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 62 states, 62 states have (on average 3.306451612903226) internal successors, (205), 62 states have internal predecessors, (205), 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) [2023-02-15 09:38:06,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:38:06,608 INFO L93 Difference]: Finished difference Result 207 states and 237 transitions. [2023-02-15 09:38:06,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-15 09:38:06,609 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.306451612903226) internal successors, (205), 62 states have internal predecessors, (205), 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 71 [2023-02-15 09:38:06,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:38:06,610 INFO L225 Difference]: With dead ends: 207 [2023-02-15 09:38:06,610 INFO L226 Difference]: Without dead ends: 201 [2023-02-15 09:38:06,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 100 SyntacticMatches, 36 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3086 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=987, Invalid=8325, Unknown=0, NotChecked=0, Total=9312 [2023-02-15 09:38:06,612 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 73 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 2443 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 2610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 2443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-02-15 09:38:06,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 138 Invalid, 2610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 2443 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-02-15 09:38:06,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-02-15 09:38:06,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 125. [2023-02-15 09:38:06,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1612903225806452) internal successors, (144), 124 states have internal predecessors, (144), 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) [2023-02-15 09:38:06,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2023-02-15 09:38:06,623 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 71 [2023-02-15 09:38:06,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:38:06,623 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2023-02-15 09:38:06,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.306451612903226) internal successors, (205), 62 states have internal predecessors, (205), 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) [2023-02-15 09:38:06,623 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2023-02-15 09:38:06,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-15 09:38:06,624 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:38:06,624 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 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, 1, 1, 1, 1] [2023-02-15 09:38:06,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 09:38:06,831 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 [2023-02-15 09:38:06,832 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:38:06,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:38:06,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1767165226, now seen corresponding path program 4 times [2023-02-15 09:38:06,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:38:06,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467876242] [2023-02-15 09:38:06,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:38:06,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:38:06,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:38:06,940 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-15 09:38:06,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:38:06,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467876242] [2023-02-15 09:38:06,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467876242] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:38:06,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550379487] [2023-02-15 09:38:06,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 09:38:06,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:38:06,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:38:06,958 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) [2023-02-15 09:38:06,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 09:38:07,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 09:38:07,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:38:07,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 09:38:07,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:38:07,077 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-15 09:38:07,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:38:07,136 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-15 09:38:07,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550379487] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:38:07,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:38:07,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-15 09:38:07,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318034412] [2023-02-15 09:38:07,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:38:07,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 09:38:07,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:38:07,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 09:38:07,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-15 09:38:07,140 INFO L87 Difference]: Start difference. First operand 125 states and 144 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:38:07,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:38:07,408 INFO L93 Difference]: Finished difference Result 289 states and 334 transitions. [2023-02-15 09:38:07,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 09:38:07,408 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2023-02-15 09:38:07,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:38:07,409 INFO L225 Difference]: With dead ends: 289 [2023-02-15 09:38:07,409 INFO L226 Difference]: Without dead ends: 168 [2023-02-15 09:38:07,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 136 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-02-15 09:38:07,410 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 274 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 09:38:07,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 39 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 09:38:07,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-15 09:38:07,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 140. [2023-02-15 09:38:07,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.1366906474820144) internal successors, (158), 139 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:38:07,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 158 transitions. [2023-02-15 09:38:07,424 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 158 transitions. Word has length 73 [2023-02-15 09:38:07,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:38:07,425 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 158 transitions. [2023-02-15 09:38:07,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:38:07,425 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 158 transitions. [2023-02-15 09:38:07,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-15 09:38:07,425 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:38:07,426 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1] [2023-02-15 09:38:07,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-15 09:38:07,630 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 [2023-02-15 09:38:07,630 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:38:07,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:38:07,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1072452492, now seen corresponding path program 5 times [2023-02-15 09:38:07,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:38:07,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28121347] [2023-02-15 09:38:07,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:38:07,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:38:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:38:07,701 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-02-15 09:38:07,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:38:07,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28121347] [2023-02-15 09:38:07,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28121347] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:38:07,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995065738] [2023-02-15 09:38:07,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 09:38:07,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:38:07,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:38:07,704 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) [2023-02-15 09:38:07,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 09:38:07,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-15 09:38:07,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:38:07,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 09:38:07,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:38:07,872 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-02-15 09:38:07,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:38:07,946 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-02-15 09:38:07,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995065738] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:38:07,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:38:07,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-15 09:38:07,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556138262] [2023-02-15 09:38:07,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:38:07,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 09:38:07,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:38:07,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 09:38:07,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-15 09:38:07,948 INFO L87 Difference]: Start difference. First operand 140 states and 158 transitions. Second operand has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 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) [2023-02-15 09:38:08,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:38:08,182 INFO L93 Difference]: Finished difference Result 156 states and 174 transitions. [2023-02-15 09:38:08,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 09:38:08,182 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 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 75 [2023-02-15 09:38:08,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:38:08,183 INFO L225 Difference]: With dead ends: 156 [2023-02-15 09:38:08,183 INFO L226 Difference]: Without dead ends: 104 [2023-02-15 09:38:08,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 141 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-02-15 09:38:08,184 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 181 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 09:38:08,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 24 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 09:38:08,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-02-15 09:38:08,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2023-02-15 09:38:08,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.118279569892473) internal successors, (104), 93 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:38:08,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2023-02-15 09:38:08,188 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 75 [2023-02-15 09:38:08,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:38:08,189 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2023-02-15 09:38:08,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 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) [2023-02-15 09:38:08,189 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2023-02-15 09:38:08,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-02-15 09:38:08,190 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:38:08,190 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1] [2023-02-15 09:38:08,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 09:38:08,394 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 [2023-02-15 09:38:08,396 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:38:08,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:38:08,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1413596990, now seen corresponding path program 6 times [2023-02-15 09:38:08,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:38:08,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327902703] [2023-02-15 09:38:08,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:38:08,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:38:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:38:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:38:16,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:38:16,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327902703] [2023-02-15 09:38:16,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327902703] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:38:16,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773420575] [2023-02-15 09:38:16,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 09:38:16,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:38:16,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:38:16,785 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) [2023-02-15 09:38:16,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 09:38:16,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-15 09:38:16,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:38:16,852 WARN L261 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 150 conjunts are in the unsatisfiable core [2023-02-15 09:38:16,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:38:16,879 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 [2023-02-15 09:38:16,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2023-02-15 09:38:22,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:38:22,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:38:22,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:38:22,680 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:38:22,681 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:38:22,681 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:38:22,682 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:38:22,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:38:22,716 INFO L321 Elim1Store]: treesize reduction 65, result has 43.0 percent of original size [2023-02-15 09:38:22,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 65 treesize of output 65 [2023-02-15 09:38:22,992 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:38:22,992 INFO L328 TraceCheckSpWp]: Computing backward predicates...