./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/eqn1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e 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-fpi/eqn1.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 14bc2dbf7c29b1d0f6a0a1f7aa323adbc9855e56ce7f667c86a31ecee97dcbe0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 12:06:50,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 12:06:50,187 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 12:06:50,212 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 12:06:50,213 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 12:06:50,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 12:06:50,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 12:06:50,220 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 12:06:50,221 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 12:06:50,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 12:06:50,225 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 12:06:50,227 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 12:06:50,227 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 12:06:50,229 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 12:06:50,230 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 12:06:50,231 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 12:06:50,232 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 12:06:50,233 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 12:06:50,234 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 12:06:50,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 12:06:50,239 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 12:06:50,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 12:06:50,241 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 12:06:50,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 12:06:50,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 12:06:50,247 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 12:06:50,247 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 12:06:50,249 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 12:06:50,249 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 12:06:50,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 12:06:50,250 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 12:06:50,251 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 12:06:50,252 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 12:06:50,253 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 12:06:50,254 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 12:06:50,254 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 12:06:50,255 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 12:06:50,255 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 12:06:50,255 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 12:06:50,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 12:06:50,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 12:06:50,257 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 12:06:50,285 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 12:06:50,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 12:06:50,286 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 12:06:50,286 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 12:06:50,287 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 12:06:50,287 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 12:06:50,287 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 12:06:50,287 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 12:06:50,288 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 12:06:50,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 12:06:50,288 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 12:06:50,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 12:06:50,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 12:06:50,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 12:06:50,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 12:06:50,289 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 12:06:50,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 12:06:50,290 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 12:06:50,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 12:06:50,290 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 12:06:50,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 12:06:50,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 12:06:50,290 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 12:06:50,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 12:06:50,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 12:06:50,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 12:06:50,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 12:06:50,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 12:06:50,291 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 12:06:50,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 12:06:50,292 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 12:06:50,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 12:06:50,292 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 12:06:50,292 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 12:06:50,292 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 12:06:50,292 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14bc2dbf7c29b1d0f6a0a1f7aa323adbc9855e56ce7f667c86a31ecee97dcbe0 [2023-02-18 12:06:50,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 12:06:50,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 12:06:50,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 12:06:50,512 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 12:06:50,523 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 12:06:50,524 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn1.c [2023-02-18 12:06:51,622 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 12:06:51,755 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 12:06:51,755 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn1.c [2023-02-18 12:06:51,760 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90a994e8e/727da2041904409e88aaa7c4bd118602/FLAGc0ed8c43f [2023-02-18 12:06:51,771 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90a994e8e/727da2041904409e88aaa7c4bd118602 [2023-02-18 12:06:51,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 12:06:51,774 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 12:06:51,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 12:06:51,775 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 12:06:51,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 12:06:51,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 12:06:51" (1/1) ... [2023-02-18 12:06:51,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3214eabe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:06:51, skipping insertion in model container [2023-02-18 12:06:51,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 12:06:51" (1/1) ... [2023-02-18 12:06:51,784 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 12:06:51,794 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 12:06:51,916 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-fpi/eqn1.c[587,600] [2023-02-18 12:06:51,942 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 12:06:51,951 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 12:06:51,963 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-fpi/eqn1.c[587,600] [2023-02-18 12:06:51,975 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 12:06:51,985 INFO L208 MainTranslator]: Completed translation [2023-02-18 12:06:51,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:06:51 WrapperNode [2023-02-18 12:06:51,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 12:06:51,987 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 12:06:51,987 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 12:06:51,987 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 12:06:51,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:06:51" (1/1) ... [2023-02-18 12:06:52,004 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:06:51" (1/1) ... [2023-02-18 12:06:52,025 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2023-02-18 12:06:52,026 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 12:06:52,027 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 12:06:52,027 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 12:06:52,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 12:06:52,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:06:51" (1/1) ... [2023-02-18 12:06:52,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:06:51" (1/1) ... [2023-02-18 12:06:52,035 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:06:51" (1/1) ... [2023-02-18 12:06:52,035 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:06:51" (1/1) ... [2023-02-18 12:06:52,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:06:51" (1/1) ... [2023-02-18 12:06:52,051 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:06:51" (1/1) ... [2023-02-18 12:06:52,052 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:06:51" (1/1) ... [2023-02-18 12:06:52,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:06:51" (1/1) ... [2023-02-18 12:06:52,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 12:06:52,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 12:06:52,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 12:06:52,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 12:06:52,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:06:51" (1/1) ... [2023-02-18 12:06:52,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 12:06:52,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:06:52,098 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) [2023-02-18 12:06:52,100 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 [2023-02-18 12:06:52,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 12:06:52,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 12:06:52,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 12:06:52,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-18 12:06:52,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 12:06:52,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 12:06:52,128 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 12:06:52,174 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 12:06:52,175 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 12:06:52,310 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 12:06:52,314 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 12:06:52,314 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-18 12:06:52,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 12:06:52 BoogieIcfgContainer [2023-02-18 12:06:52,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 12:06:52,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 12:06:52,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 12:06:52,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 12:06:52,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 12:06:51" (1/3) ... [2023-02-18 12:06:52,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2452bd6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 12:06:52, skipping insertion in model container [2023-02-18 12:06:52,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:06:51" (2/3) ... [2023-02-18 12:06:52,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2452bd6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 12:06:52, skipping insertion in model container [2023-02-18 12:06:52,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 12:06:52" (3/3) ... [2023-02-18 12:06:52,361 INFO L112 eAbstractionObserver]: Analyzing ICFG eqn1.c [2023-02-18 12:06:52,394 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 12:06:52,394 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 12:06:52,438 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 12:06:52,445 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;@31b9b8d9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 12:06:52,449 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 12:06:52,453 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 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) [2023-02-18 12:06:52,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 12:06:52,457 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:06:52,457 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:06:52,458 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:06:52,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:06:52,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2023-02-18 12:06:52,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:06:52,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101820557] [2023-02-18 12:06:52,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:06:52,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:06:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:06:52,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:06:52,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101820557] [2023-02-18 12:06:52,578 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 12:06:52,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454173212] [2023-02-18 12:06:52,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:06:52,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:06:52,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:06:52,596 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) [2023-02-18 12:06:52,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 12:06:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:06:52,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 12:06:52,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:06:52,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:06:52,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 12:06:52,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454173212] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 12:06:52,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 12:06:52,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 12:06:52,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004150171] [2023-02-18 12:06:52,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 12:06:52,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 12:06:52,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:06:52,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 12:06:52,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 12:06:52,779 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2023-02-18 12:06:52,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:06:52,794 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2023-02-18 12:06:52,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 12:06:52,796 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12 [2023-02-18 12:06:52,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:06:52,806 INFO L225 Difference]: With dead ends: 38 [2023-02-18 12:06:52,807 INFO L226 Difference]: Without dead ends: 17 [2023-02-18 12:06:52,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 12:06:52,812 INFO L413 NwaCegarLoop]: 24 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, 24 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 [2023-02-18 12:06:52,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 12:06:52,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-18 12:06:52,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-18 12:06:52,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:06:52,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-02-18 12:06:52,847 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2023-02-18 12:06:52,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:06:52,848 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-02-18 12:06:52,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2023-02-18 12:06:52,849 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-02-18 12:06:52,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 12:06:52,850 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:06:52,850 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:06:52,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 12:06:53,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-18 12:06:53,056 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:06:53,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:06:53,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2023-02-18 12:06:53,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:06:53,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810136148] [2023-02-18 12:06:53,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:06:53,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:06:53,088 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 12:06:53,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [396415799] [2023-02-18 12:06:53,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:06:53,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:06:53,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:06:53,090 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) [2023-02-18 12:06:53,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 12:06:53,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:06:53,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 12:06:53,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:06:53,214 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 12:06:53,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 100 [2023-02-18 12:06:53,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 20 [2023-02-18 12:06:53,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 20 [2023-02-18 12:06:53,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 23 [2023-02-18 12:06:53,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-18 12:06:53,270 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:53,288 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 12:06:53,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 23 [2023-02-18 12:06:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:06:53,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 12:06:53,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:06:53,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810136148] [2023-02-18 12:06:53,298 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 12:06:53,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396415799] [2023-02-18 12:06:53,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396415799] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 12:06:53,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 12:06:53,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 12:06:53,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591412976] [2023-02-18 12:06:53,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 12:06:53,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 12:06:53,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:06:53,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 12:06:53,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-18 12:06:53,301 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2023-02-18 12:06:53,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:06:53,371 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2023-02-18 12:06:53,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 12:06:53,372 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 12 [2023-02-18 12:06:53,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:06:53,373 INFO L225 Difference]: With dead ends: 34 [2023-02-18 12:06:53,374 INFO L226 Difference]: Without dead ends: 32 [2023-02-18 12:06:53,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-02-18 12:06:53,379 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 12:06:53,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 54 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 12:06:53,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-18 12:06:53,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2023-02-18 12:06:53,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 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) [2023-02-18 12:06:53,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-02-18 12:06:53,391 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2023-02-18 12:06:53,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:06:53,391 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-02-18 12:06:53,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2023-02-18 12:06:53,392 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-02-18 12:06:53,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-18 12:06:53,393 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:06:53,393 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:06:53,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 12:06:53,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-18 12:06:53,599 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:06:53,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:06:53,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2023-02-18 12:06:53,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:06:53,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591926454] [2023-02-18 12:06:53,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:06:53,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:06:53,620 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 12:06:53,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [756820046] [2023-02-18 12:06:53,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:06:53,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:06:53,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:06:53,622 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) [2023-02-18 12:06:53,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 12:06:53,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:06:53,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 12:06:53,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:06:53,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:06:53,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 12:06:53,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:06:53,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591926454] [2023-02-18 12:06:53,694 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 12:06:53,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756820046] [2023-02-18 12:06:53,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756820046] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 12:06:53,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 12:06:53,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 12:06:53,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890018661] [2023-02-18 12:06:53,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 12:06:53,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 12:06:53,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:06:53,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 12:06:53,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 12:06:53,696 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2023-02-18 12:06:53,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:06:53,740 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2023-02-18 12:06:53,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 12:06:53,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2023-02-18 12:06:53,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:06:53,742 INFO L225 Difference]: With dead ends: 49 [2023-02-18 12:06:53,742 INFO L226 Difference]: Without dead ends: 40 [2023-02-18 12:06:53,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-18 12:06:53,743 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 12:06:53,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 30 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 12:06:53,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-18 12:06:53,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2023-02-18 12:06:53,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:06:53,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-02-18 12:06:53,747 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2023-02-18 12:06:53,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:06:53,747 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-02-18 12:06:53,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2023-02-18 12:06:53,748 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-02-18 12:06:53,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-18 12:06:53,748 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:06:53,748 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:06:53,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 12:06:53,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:06:53,954 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:06:53,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:06:53,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2023-02-18 12:06:53,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:06:53,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551172879] [2023-02-18 12:06:53,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:06:53,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:06:53,972 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 12:06:53,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [463297633] [2023-02-18 12:06:53,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:06:53,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:06:53,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:06:53,991 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) [2023-02-18 12:06:53,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 12:06:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:06:54,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 12:06:54,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:06:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:06:54,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 12:06:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:06:54,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:06:54,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551172879] [2023-02-18 12:06:54,058 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 12:06:54,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463297633] [2023-02-18 12:06:54,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463297633] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 12:06:54,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 12:06:54,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2023-02-18 12:06:54,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863174420] [2023-02-18 12:06:54,059 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 12:06:54,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 12:06:54,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:06:54,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 12:06:54,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 12:06:54,060 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2023-02-18 12:06:54,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:06:54,110 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2023-02-18 12:06:54,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 12:06:54,110 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 14 [2023-02-18 12:06:54,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:06:54,111 INFO L225 Difference]: With dead ends: 44 [2023-02-18 12:06:54,111 INFO L226 Difference]: Without dead ends: 37 [2023-02-18 12:06:54,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-02-18 12:06:54,112 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 12:06:54,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 45 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 12:06:54,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-18 12:06:54,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2023-02-18 12:06:54,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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) [2023-02-18 12:06:54,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-02-18 12:06:54,116 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2023-02-18 12:06:54,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:06:54,116 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-02-18 12:06:54,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2023-02-18 12:06:54,117 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-02-18 12:06:54,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 12:06:54,117 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:06:54,117 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:06:54,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 12:06:54,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:06:54,324 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:06:54,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:06:54,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2023-02-18 12:06:54,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:06:54,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119421976] [2023-02-18 12:06:54,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:06:54,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:06:54,354 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 12:06:54,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347478940] [2023-02-18 12:06:54,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:06:54,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:06:54,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:06:54,375 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) [2023-02-18 12:06:54,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 12:06:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:06:54,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 12:06:54,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:06:54,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:06:54,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 12:06:54,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:06:54,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119421976] [2023-02-18 12:06:54,459 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 12:06:54,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347478940] [2023-02-18 12:06:54,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347478940] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 12:06:54,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 12:06:54,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 12:06:54,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803638562] [2023-02-18 12:06:54,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 12:06:54,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 12:06:54,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:06:54,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 12:06:54,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-18 12:06:54,460 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2023-02-18 12:06:54,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:06:54,494 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2023-02-18 12:06:54,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 12:06:54,494 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 16 [2023-02-18 12:06:54,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:06:54,495 INFO L225 Difference]: With dead ends: 41 [2023-02-18 12:06:54,495 INFO L226 Difference]: Without dead ends: 27 [2023-02-18 12:06:54,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-02-18 12:06:54,496 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 12:06:54,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 27 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 12:06:54,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-18 12:06:54,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2023-02-18 12:06:54,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:06:54,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-02-18 12:06:54,499 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2023-02-18 12:06:54,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:06:54,499 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-02-18 12:06:54,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2023-02-18 12:06:54,499 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-02-18 12:06:54,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 12:06:54,499 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:06:54,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:06:54,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 12:06:54,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:06:54,700 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:06:54,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:06:54,700 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2023-02-18 12:06:54,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:06:54,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275116686] [2023-02-18 12:06:54,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:06:54,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:06:54,718 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 12:06:54,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [59844345] [2023-02-18 12:06:54,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:06:54,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:06:54,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:06:54,733 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) [2023-02-18 12:06:54,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 12:06:54,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:06:54,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 12:06:54,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:06:54,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-18 12:06:54,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:06:54,847 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 14 treesize of output 14 [2023-02-18 12:06:54,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-02-18 12:06:54,855 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 14 treesize of output 16 [2023-02-18 12:06:54,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 43 [2023-02-18 12:06:54,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:06:54,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:06:54,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 87 [2023-02-18 12:06:54,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:06:54,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:06:54,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 20 [2023-02-18 12:06:54,924 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 12:06:54,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 23 [2023-02-18 12:06:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:06:54,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 12:06:55,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:06:55,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:06:55,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275116686] [2023-02-18 12:06:55,031 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 12:06:55,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59844345] [2023-02-18 12:06:55,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59844345] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 12:06:55,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 12:06:55,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2023-02-18 12:06:55,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053293787] [2023-02-18 12:06:55,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 12:06:55,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 12:06:55,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:06:55,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 12:06:55,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=116, Unknown=4, NotChecked=0, Total=156 [2023-02-18 12:06:55,033 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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) [2023-02-18 12:06:55,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:06:55,209 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2023-02-18 12:06:55,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 12:06:55,210 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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 16 [2023-02-18 12:06:55,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:06:55,210 INFO L225 Difference]: With dead ends: 54 [2023-02-18 12:06:55,210 INFO L226 Difference]: Without dead ends: 52 [2023-02-18 12:06:55,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=353, Unknown=4, NotChecked=0, Total=506 [2023-02-18 12:06:55,211 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 12:06:55,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 54 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 12:06:55,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-18 12:06:55,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 26. [2023-02-18 12:06:55,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:06:55,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-02-18 12:06:55,218 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2023-02-18 12:06:55,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:06:55,218 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-02-18 12:06:55,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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) [2023-02-18 12:06:55,218 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-02-18 12:06:55,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 12:06:55,219 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:06:55,219 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:06:55,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-18 12:06:55,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:06:55,426 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:06:55,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:06:55,426 INFO L85 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2023-02-18 12:06:55,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:06:55,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772111351] [2023-02-18 12:06:55,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:06:55,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:06:55,443 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 12:06:55,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [299757102] [2023-02-18 12:06:55,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:06:55,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:06:55,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:06:55,445 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 12:06:55,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 12:06:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:06:55,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-18 12:06:55,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:06:55,524 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 12:06:55,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 67 [2023-02-18 12:06:55,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2023-02-18 12:06:55,533 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 12:06:55,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 111 [2023-02-18 12:06:55,541 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:55,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 20 [2023-02-18 12:06:55,557 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:55,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 289 treesize of output 296 [2023-02-18 12:06:55,579 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:06:55,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:06:55,581 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:06:55,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 37 treesize of output 27 [2023-02-18 12:06:55,587 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:55,593 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:06:55,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:06:55,595 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:06:55,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 37 treesize of output 27 [2023-02-18 12:06:55,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 368 treesize of output 274 [2023-02-18 12:06:55,626 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:06:55,629 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:06:55,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 61 [2023-02-18 12:06:55,632 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:55,633 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:55,646 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:06:55,649 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:06:55,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 58 [2023-02-18 12:06:55,657 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:06:55,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-02-18 12:06:55,663 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:55,665 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:55,667 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:06:55,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2023-02-18 12:06:55,672 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:06:55,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 55 [2023-02-18 12:06:55,678 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:06:55,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-02-18 12:06:55,683 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:55,693 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:55,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-18 12:06:55,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:06:55,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 2103 treesize of output 1655 [2023-02-18 12:06:55,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1766 treesize of output 1764 [2023-02-18 12:06:55,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1764 treesize of output 1762 [2023-02-18 12:06:55,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1762 treesize of output 1760 [2023-02-18 12:06:55,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1760 treesize of output 1758 [2023-02-18 12:06:55,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1758 treesize of output 1756 [2023-02-18 12:06:56,008 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:56,010 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:56,014 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:56,016 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:56,019 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:56,021 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:56,024 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:56,025 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:56,028 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:56,031 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:56,032 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:56,035 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:56,037 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:56,039 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:56,056 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:56,064 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:56,076 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:56,078 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:56,088 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:56,113 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:06:56,115 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:06:56,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:06:56,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:06:56,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 117 [2023-02-18 12:06:56,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:06:56,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:06:56,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 11 [2023-02-18 12:06:56,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:06:56,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 2159 treesize of output 1703 [2023-02-18 12:06:56,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1906 treesize of output 1904 [2023-02-18 12:06:56,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1904 treesize of output 1902 [2023-02-18 12:06:56,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1902 treesize of output 1900 [2023-02-18 12:06:56,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1900 treesize of output 1898 [2023-02-18 12:06:56,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1898 treesize of output 1896 [2023-02-18 12:06:57,039 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:57,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:06:57,046 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:06:57,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:06:57,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:06:57,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 4 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 370 [2023-02-18 12:06:57,069 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:57,075 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:57,087 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:06:57,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:06:57,090 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:06:57,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:06:57,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:06:57,092 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:06:57,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 6 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 205 treesize of output 761 [2023-02-18 12:06:57,198 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:57,212 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:57,217 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:57,221 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:06:57,225 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:07:00,728 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 12:07:00,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 31 select indices, 31 select index equivalence classes, 0 disjoint index pairs (out of 465 index pairs), introduced 31 new quantified variables, introduced 465 case distinctions, treesize of input 8324 treesize of output 10522